COMSPHERE 392xPLUS MODEMS MODELS 3920PLUS AND 3921PLUS TECHNICAL REFERENCE MANUAL Document No.
COMSPHERE 392xPlus Modems COMSPHERE 392xPlus Modems Models 3920Plus and 3921Plus Technical Reference Manual 3920-A2-GH30-41 6th Edition (February 2002) Changes and enhancements to the product and to the information herein will be documented and issued as a new release or a Firmware Update Description document to this manual. For the Model 3920Plus standalone modems, the Universal Service Order Code (USOC) for Permissive mode is RJ11C. The Canadian equivalent to RJ11C is CA11A.
Safety Instructions Important Safety Instructions 1. Read and follow all warning notices and instructions marked on the product or included in the manual. 2. Some models are provided with a three-wire grounding type plug – a plug which has a grounding pin. This is a safety feature. Equipment grounding is vital to ensure safe operation. Do not defeat the purpose of the grounding type plug by modifying the plug or using an adapter.
COMSPHERE 392xPlus Modems Notices WARNING THIS EQUIPMENT HAS BEEN TESTED AND FOUND TO COMPLY WITH THE LIMITS FOR A CLASS A DIGITAL DEVICE, PURSUANT TO PART 15 OF THE FCC RULES. THESE LIMITS ARE DESIGNED TO PROVIDE REASONABLE PROTECTION AGAINST HARMFUL INTERFERENCE WHEN THE EQUIPMENT IS OPERATED IN A COMMERCIAL ENVIRONMENT.
Table of Contents Preface Objectives and Reader Assumptions . . . . . . . . . . . . . . . . . . . . . . . . . How to Use This Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Related Documents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vii vii viii 1. Introduction Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . COMSPHERE 392xPlus Models . . . . . . . . . . . . . . . . . . . . . . . . . . .
COMSPHERE 392xPlus Modems 4. Status Branch Status Branch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1 5. Configure Branch Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Configure Branch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Configuration Tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Multiport Mode . . . . . . . . . . . . . . . . .
Table of Contents 14. AT Command Set and S-Registers Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Command and Data Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Command Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . AT Command List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . S-Register List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
COMSPHERE 392xPlus Modems List of Figures Figure 1-1 1-2 1-3 1-4 2-1 2-2 2-3 2-4 2-5 3-1 3-2 3-3 5-1 8-1 8-2 8-3 8-4 8-5 8-6 10-1 C-1 C-2 C-3 C-4 G-1 G-2 G-3 G-4 G-5 G-6 G-7 G-8 G-9 G-10 H-1 H-2 H-3 H-4 iv Page 3920-A2 Standalone Modem . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3920-A1 Standalone Singleport and Multiport Modems . . . . . . . . . . . . . . . . . . . . . . Model 3921Plus Singleport Modem . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Table of Contents List of Tables Table 1-1 1-2 3-1 3-2 3-3 3-4 3-5 4-1 4-2 4-3 5-1 5-2 5-3 5-4 5-5 5-6 5-7 5-8 5-9 5-10 5-11 5-12 5-13 5-14 7-1 10-1 12-1 12-2 12-3 12-4 12-5 12-6 12-7 14-1 14-2 14-3 3920-A2-GH30-40 Page 392xPlus Operational Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Technical Specifications for 392xPlus Modems . . . . . . . . . . . . . . . . . . . . . . . . . . . . 392xPlus DCP LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
COMSPHERE 392xPlus Modems Table B-1 B-2 B-3 B-4 B-5 B-6 B-7 B-8 C-1 C-2 D-1 D-2 E-1 F-1 H-1 vi Page Modem Health . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Leased-Line Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Dial Backup Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Modem — DTE Connection . . . . . . . . . . . . . . . .
Preface Objectives and Reader Assumptions This manual describes how to install and operate the COMSPHERE Model 3920Plus standalone and Model 3921Plus carrier-mounted modems. Users of this manual must have a basic understanding of modems and their operation. How to Use This Manual Chapter 1 provides technical specifications, information about the four 392xPlus models, the modem features, and the government requirements for using these modems.
COMSPHERE 392xPlus Modems Appendix C provides EIA-232-D and VF TELCO pin assignments. Appendix D provides V.25bis dialing information. Appendix E provides an ASCII translation chart. Appendix F provides a list of all default configuration options available for the factory preset configurations. Appendix G provides diagrams of sample configurations for the 392xPlus modems. Appendix H provides Synchronous Data Compression information. Appendix I provides an equipment list for the 392xPlus modems.
Introduction Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . COMSPHERE 392xPlus Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Model 3920Plus Standalone Singleport Modems . . . . . . . . . . . . . . . . . . . Model 3920Plus Standalone Multiport Modem . . . . . . . . . . . . . . . . . . . . Model 3921Plus Singleport Carrier-Mounted Modem . . . . . . . . . . . . . . . Model 3921Plus Multiport Carrier-Mounted Modem . .
COMSPHERE 392xPlus Modems COMSPHERE 392xPlus Models The COMSPHERE 392xPlus modem is available in the following models: • Model 3920Plus standalone singleport modem (model no. 3920-A1-xxx and 3920-A2-xxx). • Model 3920Plus standalone multiport modem (model no. 3920-A1-40x). • Model 3921Plus carrier-mounted singleport modem (model no. 3921-B1-01x). • Model 3921Plus carrier-mounted multiport modem (model no. 3921-B1-00x). A reference to 392xPlus modems refers to all 3920Plus and 3921Plus models.
Chapter Title Model 3920Plus Standalone Multiport Modem The Model 3920Plus multiport is a standalone modem (Figure 1-2), with an integral time division multiplexer (TDM) and a modem sharing device (MSD) as standard equipment. The TDM provides time division multiplexing of up to four independent ports over point-to-point lines using the V.34 family or V.32 family modulation. The MSD allows multiple physical ports on a tributary modem to share a single communication channel using the V.34 family, V.
COMSPHERE 392xPlus Modems Model 3921Plus Singleport Carrier-Mounted Modem The Model 3921Plus singleport is a carrier-mounted modem (Figure 1-3) capable of either 4-wire/2-wire leased-line or dial operation. The modem installs into a COMSPHERE 3000 Series Carrier, occupying a single slot. The modem’s faceplate has sixteen (16) LED status indicators for displaying modem activity and an audio speaker jack for the carrier’s optional speaker.
Introduction Model 3921Plus Multiport Carrier-Mounted Modem The Model 3921Plus multiport is a carrier-mounted modem (Figure 1-4) equipped with an integral time division multiplexer (TDM) with a modem sharing device (MSD). The modem installs into the COMSPHERE 3000 Series Carrier, occupying two slots. The modem’s faceplate covers two slots in the carrier. It has twenty (20) LED status indicators for displaying modem activity and an audio speaker jack for the carrier’s optional speaker.
COMSPHERE 392xPlus Modems 392xPlus Operational Modes The 392xPlus operational modes determine how your modem performs in various applications. These operational modes are determined by your modem model and the selected configuration options. There are two operational modes: • Singleport. Operates on both the singleport and multiport modem models. The Singleport mode only supports one port (DTE 1). Singleport mode is the only operational mode for the singleport modem models.
Introduction 392xPlus Modem Features The 392xPlus modems share a wide variety of features. • Asynchronous DTE rates of 115.2 kbps and 76.8 kbps. • Asynchronous data compression and error correction. • Synchronous data compression. • Additional VF parameters under the V.32 and V.34 family modulations in 4-wire mode. • International Support to correctly detect the call progress signals (dial tone, busy, fast busy, ringback) for a variety of countries.
COMSPHERE 392xPlus Modems Applications Multipoint Multipoint is available in all 392xPlus modem models. It utilizes leased-line circuits for time sharing the same front-end processor (FEP) port with multiple remote locations. The FEP (via the control modem) regulates traffic on the line by continuously polling the tributary DTE(s) in a predefined sequence. Only one tributary can communicate with the control modem at a given time.
Introduction When the Digital Bridging feature is enabled, a new menu is present with the following conditions: • TDM capability is disabled when DTE Bridge configuration option is set to Enable, therefore the rate of Port 1 is forced to run at the line rate. • Configuration options are provided for Port 1 only; Port 2 cannot be configured. • Ports 3 and 4 are not available. • Port-related tests, such as digital loopbacks and Pattern tests, are available for Port 1.
COMSPHERE 392xPlus Modems NOTE When a 2400 V.34 modulation connection occurs on one end of a modem pair with configuration options set for Asymmetric rates, the other modem is 24K due to the 2400 symbol rate it uses. Multiport Backup When the 392xPlus multiport modem has the MUX Mode configuration option set to either TDM/MSD or DTE Bridge, it is in Multiport mode, and either dial lines or a 2-wire leased line can be used to back up the primary 4-wire leased line.
Introduction 4. The ringer equivalence (REN) is used to determine the quantity of devices which may be connected to the telephone line. Excessive RENs on the telephone line may result in the devices not ringing in response to an incoming call. In most, but not all areas, the sum of the RENs should not exceed five (5.0). To be certain of the number of devices that may be connected to the line, as determined by the total RENs, contact the telephone company to determine the maximum RENs for the calling area.
COMSPHERE 392xPlus Modems Canada NOTICE TO USERS OF THE CANADIAN PUBLIC SWITCHED TELEPHONE NETWORK The Canadian Department of Communications label identifies certified equipment. This certification means that the equipment meets certain telecommunications network protective, operational, and safety requirements. The Department does not guarantee the equipment will operate to the user’s satisfaction.
Introduction Technical Specifications Table 1-2 shows the technical specifications for the 392xPlus modems. Table 1-2 (1 of 2) Technical Specifications for 392xPlus Modems Description Specifications APPROVALS Model 3920Plus, 3921Plus, and COMSPHERE 3000 Series Carrier Refer to the product labeling or contact your service representative.
COMSPHERE 392xPlus Modems Table 1-2 (2 of 2) Technical Specifications for 392xPlus Modems Specifications Description TRANSMIT LEVEL Leased Line (North America) 0 through –15 dBm (in 1 dBm decrements) Factory default is 0 dBm Leased Line (All Other Countries) –1 through –15 dBm (in 1 dBm decrements) Factory default is country dependent Dial Line (North America) –10 through –32 dBm (in 1 dBm decrements) Factory default is Permissive (–9 dBm) Dial Line (All Other Countries) Level setting is not acces
Modem Installation Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 392xPlus Modem Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Customer-Supplied Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Model 3920Plus Modem Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Connecting Cables to the Model 3920Plus Modem . . . . . . . . . . . . . . . . . . . .
COMSPHERE 392xPlus Modems For the carrier-mounted models • Installation instructions • Model 3921Plus modem • One (singleport) connector plate or two (multiport) connector plates with two DB-25-S edge card connectors on each plate If any hardware components are damaged, notify your service representative. Return equipment using the procedures described in the Government Requirements and Equipment Return section of Chapter 1, Introduction.
Modem Installation Model 3920Plus Modem Installation Before installing your standalone modem, make sure your installation site is clean and well-ventilated. Allow space around the modem for installing cables and telephone cords, and make sure the modem is located within reach of the ac power outlet. The distance between your modem and DTE should be minimized if DTE data rates exceed 19,200 bps.
COMSPHERE 392xPlus Modems DIAL LEASED LEASED-LINE NETWORK 8-POSITION PLUG DIAL NETWORK 6-POSITION PLUG DTE 1 NMS PWR ON OFF DATA TERMINAL EQUIPMENT DB-25-P CONNECTOR SUB-MINIATURE 4-POSITION PLUG FOR NETWORK HUBBING MANAGEMENTDEVICE SYSTEM OPERATION POWER SUPPLY 98-14677-03 Figure 2-1.
Modem Installation DB-25-S CONNECTORS DTE 2 DTE 3 LEASED DIAL LEASED-LINE NETWORK 8-POSITION, 8-CONDUCTOR PLUG DIAL NETWORK 6-POSITION, 4-CONDUCTOR PLUG OR LEASED BACKUP 8-POSITION, 8-CONDUCTOR PLUG DTE 1 DTE 4 NMS PWR ! ON OFF DATA TERMINAL EQUIPMENT DB-25-P CONNECTOR NETWORK MANAGEMENT SYSTEM SUB-MINIATURE, 4-POSITION, 4-CONDUCTOR PLUG POWER SUPPLY HUBBING DEVICE POWER CORD 495-14788 Figure 2-2.
COMSPHERE 392xPlus Modems Data Terminal Equipment Connection Use the following steps to connect an EIA-232-D cable from the modem to a DTE: 1. Make sure the modem is powered OFF. 2. Connect the DB-25-P (plug) connector on the cable to the first or only DB-25-S (socket) connector (Figure 2-1 or 2-2) on the modem’s back panel, labeled DTE 1. Use a small screwdriver to secure the cable to the modem. 3. For multiport modems, connect cables similarly to DTE 2 through DTE 4. 4.
Modem Installation Leased-Line Network Connection Use the following steps to connect the leased-line network interface: 1. Insert the 8-position, 8-conductor modular plug into the jack labeled LEASED (Figure 2-1 or 2-2). 2. Insert the other end of the modular cord into the leased-line network interface. 3. If the Model 3920Plus has a backup line, follow the steps listed in the Dial Backup Connection section.
COMSPHERE 392xPlus Modems Removing and Replacing the Model 3920Plus Modem To remove and replace the Model 3920Plus modem, perform the following steps: 1. Make sure the modem is offline. Press the modem’s back panel power switch to OFF. 2. Disconnect the power cord from the ac power outlet. 3. Disconnect the dc power cable from the connector on the back of the modem. 4. Disconnect the leased-line and dial modular cord(s) from the modem’s back panel. 5.
Modem Installation DTE A DTE A PORT 3 PORT 1 EIA232/V.24 SINGLEPORT BACK CONNECTOR PLATE MULTIPORT BACK CONNECTOR PLATES EIA232/V.24 CONNECTOR V.35 (3600/3500) PORT 2 RS366A/V.25 (3800) DTE B PORT 4 DTE B GROUNDING TAB FUTURE USE 495-14696-01 Figure 2-3. Model 3921Plus Back Connector Plates 2.
COMSPHERE 392xPlus Modems 3000 SERIES CARRIER SDU MODEL 3921Plus SINGLEPORT MODEM LATCH CIRCUIT CARD GUIDES 3000 SERIES CARRIER SDU MODEL 3921Plus MULTIPORT MODEM LATCH CIRCUIT CARD GUIDES 495-14708 Figure 2-4.
Modem Installation If the Model 3921Plus modem is to communicate with an installed SDCP, install the modem as described above and perform the following steps: 1. Press the Select key on the SDCP. The Carr:Slot screen appears with the cursor on the slot selection position (01 on the first LCD line in following screen example). Carr:Slot: ↑ ↓ F1 F2 1:01A 1:01A F3 2. Press the F1 ( " ) or F2 ( # ) key until the slot number you want appears. 3.
COMSPHERE 392xPlus Modems 6. When the modem is installed properly and the power-up self-test completes, rotate the circuit pack lock until it covers the faceplate latch (Figure 2-5). Tighten the retention screw on the circuit pack lock. This prevents the modem from accidently being removed once it is installed in a carrier. 7. Configure the modem as described in the Selecting Factory Configuration Options section in this chapter.
Modem Installation Removing the Model 3921Plus Modem CAUTION When removing the Model 3921Plus modem from the carrier, always use a ground strap when handling the modem. Always store the Model 3921Plus modems in an antistatic bag when it is removed from the carrier. It is not necessary to power down the carrier to remove the Model 3921Plus modem. Perform the following steps: 1. Rotate the circuit pack lock until the release tab is exposed (Figure 2-4). 2.
COMSPHERE 392xPlus Modems configuration, then you must change the factory setting using either the modem’s DCP (as described in the following sections) or the AT command set. The purpose of having preset configurations is so that you can have a “head start” in getting your modem operating and reducing the amount of time required to configure your modem. For a better understanding of DCP operation and factory preset configuration options, refer to Chapter 5, Configure Branch.
DCP Operation Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Diagnostic Control Panels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Model 3920Plus Diagnostic Control Panel . . . . . . . . . . . . . . . . . . . . . . . . Model 3921Plus Faceplate and Shared Diagnostic Control Panel (SDCP) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Status Indicators . . . . . . . . . . . . . . . .
COMSPHERE 392xPlus Modems Model 3920Plus Diagnostic Control Panel The diagnostic control panel (DCP) of the Model 3920Plus modem (Figure 3-1) contains status indicators, pushbutton-type keys, an LCD, and speaker grill. F1 PWR F3 F2 ALRM DIAG DTR RTS CTS TXD LSD RXD 108 105 106 103 109 104 SQ TEST RATE DIAL COMSPHERE 3920Plus 142 496-14412-02 Figure 3-1.
DCP Operation MULTIPORT SINGLEPORT Status Status Status OK Pwr Alrm Alrm Diag In Diag Out 142 Pwr Alrm Test 142 Dial 125 Test Dial RI 125 RI Busy Busy Serv Serv SQ SQ 1 3 Port 2 4 103 TXD 103 TXD 104 RXD 104 RXD 105 RTS 105 RTS 106 CTS 106 CTS 107 DSR 107 DSR 108 DTR 108 DTR 109 LSD 109 LSD Front Panel Front Panel Spkr Spkr 3921Plus 3921Plus SDU CARRIER SLOTS 1–16 SDU 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Select OK Alarm
COMSPHERE 392xPlus Modems Table 3-1 (1 of 2) 392xPlus DCP LEDs Label Color Indicates Pwr green Power has been applied to the modem. Alrm red Flashing – A major alarm has been detected in a remote 392xPlus modem. ON – A major alarm has been detected in the local modem. (For Health and Status alarm conditions, refer to Table 4-1 in Chapter 4, Status Branch.) Diag (3920Plus only) green The modem is receiving diagnostic communications (either a command or a status poll).
DCP Operation Table 3-1 (2 of 2) 392xPlus DCP LEDs Label Color Indicates Port* 1,2,3,4 (3921Plus multiport only) green ON – The selected port* is one of the mux ports (either 1, 2, 3, or 4). TXD/103* green The modem is receiving data from the selected port* to transmit. (ON equals space.) RXD/104* green Data is being transferred to the selected port*. (ON equals space.) RTS/105* green RTS signal is ON for the selected port*. CTS/106* green CTS signal is ON for the selected port*.
COMSPHERE 392xPlus Modems Diagnostic Control Panel Operation The 392xPlus modem’s diagnostic control panel (DCP) is the user interface to all functions used to configure and control the modem. In addition to the status LEDs, this interface includes the liquid crystal display (LCD) and keypad (Figure 3-3). LCD TOP LINE MOVES UP ONE LEVEL FROM CURRENT DISPLAY HIDDEN CHOICE INDICATOR Leased:33.
DCP Operation Other Indicators Other indicators may turn on depending on existing conditions, such as error detection, informational alerts, and warnings. These indicators appear on the top or bottom line of the LCD. Remote Mode Indicator If the local 392xPlus modem establishes a connection with the remote 392xPlus modem via the Remote branch, then appears in the upper right corner of the LCD top line on both modems. For more information on the Remote Mode indicator, refer to Chapter 13, Remote Branch.
COMSPHERE 392xPlus Modems F1 F2 F3 Keys Function keys F1, F2, and F3 select the LCD choice that appears above the function key. If the displayed LCD choice spans more than one function key, then any of the function keys can select that choice. (The screen examples in this manual use the F1 key to illustrate selection when multiple function keys select the choice.) Select Key (Model 3921Plus only) The Select key appears on the optional SDCP of the COMSPHERE 3000 Series Carrier.
DCP Operation The menu tree contains the following branches: 3920-A2-GH30-40 Quick Config — Used to display the basic operational characteristics of the modem. Status — Used to monitor the current status of the VF line and DTE interface as well as view the identity of the modem. Configure — Used to change and save the modem’s configuration options.
COMSPHERE 392xPlus Modems Top-Level Menu Status and Operational Messages Access to all menu tree branches from the DCP begins at the Top-Level menu, the head of the menu hierarchy. The LCD’s top line identifies the modem status, as listed in Table 3-3, while the bottom line displays the main menu tree branches as well as operational and security messages, as listed in Table 3-4 and Table 3-5.
DCP Operation Table 3-3 (2 of 3) Top-Level Menu Status Status Call Failure Message Indicates Busy Signal The answering modem is busy. Delayed Number { As a result of failed call attempts, this number can not be called at this time. Please try again later. Dial Line in Use The modem is operating on dial networks when another call attempt is issued. Forbidden Number { As a result of failed call attempts, this number can not be called again.
COMSPHERE 392xPlus Modems Table 3-3 (3 of 3) Top-Level Menu Status Status Call Disconnect Firmware Download Result AT Command Reset 3-12 Message Indicates ATH Disconnect The modem has disconnected due to an ATH command. Bad Lines Disc The modem has disconnected because the lines do not support the modulation and/or data rate selected. No Carrier Disc The modem disconnects due to the loss of carrier signal from the remote modem.
DCP Operation Messages listed in Table 3-4 are common operational messages that occur during modem operation. These messages normally appear on the second line of the LCD. Table 3-4 Common Operational Messages Common Operational Message Indicates Please Wait... A command to a local device takes more than two seconds to complete. Command Sent... A command is sent to a remote modem. No Rem Response or Remote Modem Fail A remote modem does not respond to a command within 5 seconds.
COMSPHERE 392xPlus Modems Quick Configuration Display The Quick Configuration display indicates the basic operational characteristics of the modem. Leased:33.6 Status Configure F1 F3 F2 The modem’s Quick Configuration information appears on the LCD’s bottom line. To access the Quick Configuration display from the Top-Level display, press the on the configuration of the modem, one of two screens appears. key. Based If the modem is not operating with V.34 modulation, the following screen appears.
DCP Operation The following provides information about the Quick Configuration LCD display. a Displays the network position of the modem. The letter C indicates this is a control modem, and T indicates this is a tributary modem. bbb Displays the network management address of the modem. The valid address field range is from 001 to 256. c Displays the DTE mode. The letter A indicates the currently selected port is in Asynchronous mode, and S indicates the currently selected port is in Synchronous mode.
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DCP Operation Diagnostic Control Panel Access NOTE This page of the manual is self supporting and can be removed to prevent unwanted knowledge of the DCP security access selections. Use the DCP security access function to “lock” the DCP of any 392xPlus modem and prevent unwanted user access. Two options are available for this function: Grant and Deny. Grant allows any branch of the Top-Level menu to be accessed from the DCP. Deny only allows access to the Status branch of the Top-Level menu.
COMSPHERE 392xPlus Modems 3-18 October 1998 3920-A2-GH30-40
Status Branch Status Branch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Device Health and Status (DeviceHS) . . . . . . . . . . . . . . . . . . . . . . . . . . . VF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Displaying VF Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Clearing VF Counters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
COMSPHERE 392xPlus Modems “Status” PList Configure Control Test SubHS SDC V.
Status Branch Device Health and Status (DeviceHS) DeviceHS provides a ‘‘snapshot” of current modem alarms which are active at the time the DeviceHS function is selected. To access DeviceHS from the Status branch, make the following selection: Status: DeviceHS F1 F2 > VF F3 Select DeviceHS. Device HS: Major F1 F2 > Minor F3 If alarms are present, press the appropriate function key to view the messages associated with these alarms (Table 4-1).
COMSPHERE 392xPlus Modems Table 4-1 (2 of 3) Health and Status Messages Type Status Dial Thresh* Message Indicates Subtree Truncate Downstream health and status information has been truncated because it overflowed system limits. There is a large amount of health and status information in the subnetwork. Test Mode The modem or an upstream device is running a disruptive test. Disabled The modem’s DTE port has been disabled. On Dial Backup The modem is operating in Dial Backup mode.
Status Branch Table 4-1 (3 of 3) Health and Status Messages Type Security Ports 1 Ports 2 Ports 3 Ports 4 Message Indicates Database Reset The security database has been reset (passwords erased). Password Protect Security password protection is enabled. Mode Change There has been a change in security mode. (Refer to Chapter 12, Dial Access Security.) Password Change A security password has been changed. Database Change The security database containing passwords has been changed.
COMSPHERE 392xPlus Modems Displaying VF Conditions Status:VF Display F1 F2 Clear F3 To display VF conditions, select Display from the Status:VF screen. Status:VF SigQual=Excelent F1 F2 > F3 If the modem is receiving a signal, the signal quality appears on the LCD’s bottom line. If the modem is not receiving a signal, the message No Signal appears. Press the key to scroll and view the VF conditions. NOTE Not all conditions are available at 4800 bps.
Status Branch EchoFreqOff Echo Frequency Offset displays the frequency offset of the far end echo. This parameter appears for V.34, V.32terbo, V.32bis, and V.32 modulations (in 2-wire only). Phase Hts Phase Hits reports the total hit count of sudden uncontrolled changes in the phase of the receive signal for the past 15 minutes. This parameter appears for V.34 family, V.32terbo, V.32bis, and V.32 modulations (in 4-wire only).
COMSPHERE 392xPlus Modems VF Counter Clear Command Complete F1 F3 F2 The message Command Complete appears on the LCD’s bottom line indicating the VF Counters are cleared. To exit VF and remain in the Status branch, press the key. Top-Level menu, press the key. To exit and return to the Identity Identity displays the modem’s serial number, model number, firmware revision level, hardware revision number and firmware part number.
Status Branch To exit the Identity function and remain in the Status branch, press the return to the Top-Level menu, press the key. key. To exit and DTE DTE displays the state and/or activity of the following interface leads: LSD, DTR, DSR, TST, TXD, RXD, RTS, and CTS. The interface leads status is updated every 5 seconds. To access DTE from the Status branch, make the following selections: Status: Identity F1 Press the DTE F2 F3 key until DTE appears. Select DTE.
COMSPHERE 392xPlus Modems SDC When running synchronous data compression, the SDC function displays information about the modem’s transmitting and receiving DTE rate, compression ratio, and line efficiency. NOTE Once a connection terminates, the last valid parameters are locked in place until the next connection. To access SDC from the Status branch, make the following selections: Status: SDC F1 V.34 F2 F3 Select SDC. SDC Performance: Tx Rx F1 F2 F3 Select either Tx (transmit) or Rx (receive).
Status Branch Table 4-2 SDC Performance Measurements DTE Rate Compression Ratio Line Efficiency Tx The number of bits per second received from the DTE. This number takes into account only the data between the opening and closing flags of the HDLC frames. Flags and DTE interframe time fill are ignored. The ratio between the number of bits in the input and output of the compression algorithm. The calculation does not include the overhead of the LAPM frame or the DTE flags and DTE interframe time fill.
COMSPHERE 392xPlus Modems If the modem is receiving a signal, the signal quality appears on the second LCD line. Press the key to scroll and view the V.34 modem receive rate, symbol rate, transmit rate, and asymmetric. If the modem is not receiving a signal, the message No Sync appears. 4-12 TxRate Modem Transmit Rate indicates the rate at which the modem is transmitting data. Possible values are 2400, 4800, 7200, 9600, 12.0 (12,000), 14.4 (14,400), 16.8 (16,800), 19.2 (19,200), 21.6 (21,600), 24.
Status Branch Backup The Status Backup function displays the configuration of the modem’s current operating line facility and the configuration and condition of the inactive line. NOTE The modem’s rear panel has two line interface jacks: LEASE and DIAL (see Figure 2-2 in Chapter 2). The jack labeled LEASE is the APL primary interface and accepts either 2-wire or 4-wire APL. The jack labeled DIAL is the backup interface and accepts either 2-wire APL (Dual Lease Line) or Dial lines.
COMSPHERE 392xPlus Modems Table 4-3 Backup Status Screens Active Line 1st Screen Display Line=Pri 4w APL or Line=Pri 2w APL Inactive Line 2nd Screen Display Bckup:2wAPL=XXXX or Bckup : Dial =(blank) Possible Inactive/Backup Line Condition Good indicates that line continuity is detected. Bad indicates that line continuity is not detected. ???? indicates that the line condition is unknown (Backup Facility Check is making its first determination of the line conditions since the last retrain).
Status Branch Options The Options Status function displays all optional firmware features currently installed in the modem. If no firmware options are installed, None_Installed appears on the LCD. To access Options from the Status branch, make the following sections: Status: DTE F1 Press the Options F3 F2 key until Options appears. Select Options. Options:Status V.29 F1 F2 > V.33 F3 If optional features are installed in the modem, they appear on the LCD’s bottom line.
COMSPHERE 392xPlus Modems Record Record is a troubleshooting tool used in conjunction with support personnel. This function retrieves and reports any sequence faults to support personnel. A sequence fault is an irregular or unexpected event. There are two selections under Record: Display and Clear. Display allows up to eight sequence fault messages that are recorded by the modem and displayed on the LCD in descending order. If no sequence faults have occurred, then Modem O.K. appears.
Status Branch Service Log Service Log is a troubleshooting tool used in conjunction with support personnel. Use this function to retrieve and report Service Log data to support personnel. To access Service Log from the Status branch, make the following selections: Status: Service_Log F1 Press the F2 < F3 key until Service appears. Select Service Log. Service Log: xx Nxt mm/dd/yy zz F1 F2 F3 Support personnel will request the applicable information from this screen.
COMSPHERE 392xPlus Modems 4-18 October 1998 3920-A2-GH30-40
Configure Branch Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Configure Branch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Editing and Saving a Configuration Option . . . . . . . . . . . . . . . . . . . . . . . Configuration Tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Multiport Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
COMSPHERE 392xPlus Modems • Factory is a read-only (unchangeable) configuration area containing six sets of predefined configuration options labeled Sync Leased, Async Leased, TMp (Trellis Multipoint), Async Dial, Sync Dial, and UNIX Dial. If Sync Leased or Async Leased is selected, you must choose either Answer or Originate mode. If TMp is selected, you must choose either Control or Trib (Tributary) mode.
Configure Branch Configure Branch The Configure branch of the Top-Level menu contains all of the modem’s configuration options which determine how the modem operates. These configuration options are accessed by scrolling down and across various levels of the Configure branch.
COMSPHERE 392xPlus Modems The Configure branch consists of the following three levels: • Ld EditArea frm. Allows the selection of the Active (Operating), Active (Saved), Customer 1, Customer 2, and Factory configuration areas. • Choose Function. Allows you to make changes (Edit) to existing configuration options or write (Save) these changes to either the Active (Saved), Customer 1, or Customer 2. • Edit Strap Group.
Configure Branch Ld Fact Preset: Sync_Leased F1 > F3 F2 Select Sync_Leased. Choose Mode: Answer Originate F1 F3 F2 Select Answer. Choose Function: Edit Save F1 F3 F2 Select Edit. Edit StrapGroup: DTE_Interface F1 F2 > F3 Edit StrapGroup Test Misc F1 F2 F3 Scroll across the LCD and select the Misc configuration options group.
COMSPHERE 392xPlus Modems StrapsWhenDisc > Nxt No_Change F1 F2 F3 RemAccssPasswrd: Nxt "00000000 F1 F2 F3 Select Nxt until RemAccssPasswrd appears. RemAccssPasswrd: Nxt "10000000 F1 F2 F3 Select the F2 ( " ) key to increment password values. RemAccssPasswrd: Nxt "10000000 F1 Press the F2 F3 key to move the cursor to the next position. RemAccssPasswrd: Nxt "12345678 F1 F2 F3 Continue this sequence until you have entered the new password value.
Configure Branch To save the new password to a configuration area, make the following selections: RemAccssPasswrd: Nxt "12345678 F1 Press the F3 F2 key to scroll up (twice). Choose Function Edit Save F1 F3 F2 Select Save. Sav EditArea to Active(Saved) F1 F2 > F3 Select a configuration area (Active (Saved), Customer 1, or Customer 2) to save the changes. Select the branch.
COMSPHERE 392xPlus Modems Configuration Tables Each modem operates in either the Multiport or Singleport mode depending on the modem’s configuration (refer to 392xPlus Operational Modes in Chapter 1, Introduction). The modem’s configuration options are arranged into six groups in the Multiport mode, and nine groups in the Singleport mode. When using configuration option tables, be sure you are referencing the correct group (Multiport or Singleport mode).
Configure Branch Multiport Mode DTE Interface DTE Dialer Line Dialer Dial Line AutoAnswerRing# Dialer Type DialTone Detect Blind Dial Paus BusyTone Detect "," Pause Time NoAnswer Timout Fast Disconnect Line Crnt Disc Long Space Disc No Carrier Disc No Data Disc Auto Make Busy MUX MUX Mode –TDM/MSD –DTE Bridge Tx Clock Source Port4 Ext Alarm Bakup_TXClk_Src CT111_Rate Cntl MSD Port Control Dial Modulation Dial Line Rate Autorate V32bis Override Dial Tx Level Train Time V34 Symbol Rate V.
COMSPHERE 392xPlus Modems DTE Interface — Multiport Mode l The DTE Interface configuration options contain EIA-232-D (ITU-T V.24) and asynchronous character format information essential for maintaining a connection and for transmitting data between the DTEs and the modem.
Configure Branch Table 5-1 (2 of 9) DTE Interface Configuration Options — Multiport Mode l Port4 Ext Alarm: Disable Nxt Disable EnableLow EnableHigh This configuration option only appears when MUX Mode is configured for TDM/MSD. Port 4 External Alarm Monitor. Determines if Port 4 can be used to transmit user data. When enabled, this configuration option prevents Port 4 of the modem from being used to transmit user data.
COMSPHERE 392xPlus Modems Table 5-1 (3 of 9) DTE Interface Configuration Options — Multiport Mode l MSD Port Control: Host Nxt Host Modem This configuration option does not appear when MSD is disabled. Modem Sharing Device Port Control. Host – The host computer determines the polling sequence that controls which port transmits at any given time. When the DTE/DCE equipment attached to a port raises RTS (Request-to-Send) it gets to use the channel.
Configure Branch Table 5-1 (4 of 9) DTE Interface Configuration Options — Multiport Mode l Rate at 14.4 K Nxt Disable 14400 12000 9600 7200 4800 2400 1200 Rate at 14.4K. When the modem rate is 14,400 bps the port rate will be as selected by this configuration option (Disable or 14400 to 1200). The total for all ports cannot exceed the modem rate of 14,400 bps. Rate at 12.0 K Nxt Disable 12000 9600 7200 4800 2400 1200 Rate at 12.0K.
COMSPHERE 392xPlus Modems Table 5-1 (5 of 9) DTE Interface Configuration Options — Multiport Mode l Asyn #Data Bits: 8 Nxt 8 7 9 6 This configuration option only appears when Async/Sync Mode is configured for Async. Asynchronous Number of Data Bits. Determines if the asynchronous data length is composed of 6, 7, 8, or 9 data bits. This data length excludes start, parity, and stop bits. 8 – Sets data length to 8 data bits. 7 – Sets data length to 7 data bits.
Configure Branch Table 5-1 (6 of 9) DTE Interface Configuration Options — Multiport Mode l DSR Control: Stndrd_RS232 Nxt Stndrd_RS232 Forced_On WinkWhenDisc Follows_DTR On_Early Delay_ToData Data Set Ready Control. DSR is a signal from the modem to the DTE indicating the modem is connected and ready for operation. Standard RS232 – Allows the modem to control DSR to the DTE. The modem raises DSR when it begins the handshake process. DSR lowers upon disconnect.
COMSPHERE 392xPlus Modems Table 5-1 (7 of 9) DTE Interface Configuration Options — Multiport Mode l CTS Control: Stndrd_RS232 Nxt Stndrd_RS232 Forced_On WinkWhenDisc Follows_DTR Follows_RTS Clear-to-Send Control. CTS is a signal from the modem to the DTE indicating that it can accept data from the DTE. Standard RS232 – In Synchronous mode, forces the state of CTS to follow the state of RTS in normal EIA-232-D operation.
Configure Branch Table 5-1 (8 of 9) DTE Interface Configuration Options — Multiport Mode l XTXC Clamps TXC: Enable Nxt Enable Disable This configuration option only appears when the TX Clock Source or Bakup_TXClk_Src configuration option is set to Port 1, 2, 3, or 4 and Async/Sync mode is Sync. External Transmit Clock Clamps Transmit Clock. Allows the port’s TXC output (Pin 15 on the EIA-232-D interface) to be clamped OFF when TX Clock Source is configured for Port 1, 2, 3, or 4.
COMSPHERE 392xPlus Modems Table 5-1 (9 of 9) DTE Interface Configuration Options — Multiport Mode l Port TXC Source: Internal Nxt Internal External Port Transmit Clock Source. Determines the clock source used to clock transmit data into the port buffer from Pin 2 (TXD) of the EIA-232-D interface. The port buffer is used to compensate for timing differences when a port is connected via a crossover cable to another modem’s EIA-232-D interface.
Configure Branch Line Dialer — Multiport Mode l The Line Dialer configuration options establish parameters used by the modem to answer or originate calls. Table 5-2 shows each Line Dialer configuration option as it appears on the LCD, with the Sync Leased factory default setting (the default value if the modem is just being installed) shown following the colon ( : ) on the first line and with all available selections listed on the second line. Following this is a description of the configuration option.
COMSPHERE 392xPlus Modems Table 5-2 (2 of 3) Line Dialer Configuration Options — Multiport Mode l Blind Dial Paus: 2sec Nxt 2sec 4sec 6sec 8sec 10sec 20sec This configuration option only appears when Dial Tone Detect is disabled. Blind Dial Pause. Determines how long the modem waits before dialing a telephone number when Dial Tone Detect is disabled. NOTE: The range of allowable values may be restricted in some countries. BusyTone Detect: Enable Nxt Enable Disable Busy Tone Detect.
Configure Branch Table 5-2 (3 of 3) Line Dialer Configuration Options — Multiport Mode l Long Space Disc: Enable Nxt Enable Disable Long Space Disconnect. Determines the modem’s response to a continuous spacing condition sent from the remote modem before it goes on-hook. Issuing a long space is one method of disconnecting a call. Enable – Modem disconnects if it receives a continuous space from the DTE.
COMSPHERE 392xPlus Modems Dial Line — Multiport Mode l The Dial Line configuration options are used to configure the modem for operation over dial lines. Table 5-3 shows each Dial Line configuration option as it appears on the LCD, with the Sync Leased factory default setting (the default value if the modem is just being installed) shown following the colon ( : ) on the first line and with all available selections listed on the second line. Following this is a description of the configuration option.
Configure Branch Table 5-3 (2 of 3) Dial Line Configuration Options — Multiport Mode l Dial Tx Level: Permissv(–9) Nxt Permissv(–9) –10 –11 –12 –13 –14 –15 –16 –17 –18 –19 –20 –21 –22 –23 –24 –25 –26 –27 –28 –29 –30 –31 –32 Dial Transmit Level. Selects the modem’s transmit power level over dial lines. The transmit output level can be selected in 1 dBm decrements from –9 dBm to –32 dBm. NOTE: In North America the range of allowable values is –10 dBm to –32 dBm, plus Permissive (–9 dBm).
COMSPHERE 392xPlus Modems Table 5-3 (3 of 3) Dial Line Configuration Options — Multiport Mode l Asymmetric Rate: Disabled End Enable Disable This configuration option only appears when V.34 is enabled. Asymmetric Rate. Controls rate symmetry when running V.34 modulation by enabling or disabling the V.34 modulation from using equal transmit and receive rates. Enable – The modem operates in asymmetric rate mode (the transmit and receive rates can be different) when running V.34 modulation.
Configure Branch Leased Line — Multiport Mode l The Leased Line configuration options only appear when the Sync Leased factory preset template is selected. They are used to configure the modem for operation over leased lines.
COMSPHERE 392xPlus Modems Table 5-4 (2 of 5) Leased Line Configuration Options — Multiport Mode l Autorate: Enable Nxt Enable Disable Fast GainHit Autorate. Once connected, the modem automatically lowers the line rate if line conditions become impaired. When line conditions improve, the modem automatically shifts up to the highest data rate the line can support. Autorate only occurs between 19,200 bps and 4800 bps during V.32, V.32bis, and V.32terbo connections and 33.6 and 2400 bps for the V.34 family.
Configure Branch Table 5-4 (3 of 5) Leased Line Configuration Options — Multiport Mode l 2 Sec LSD Hold: Disable Nxt Disable Enable This configuration option only appears when V.34 is enabled. Two-Second LSD Hold. Holds the Line Signal Detect (LSD) for a maximum of two seconds. During this time, the carrier can drop completely and be reacquired by the receiver without retraining.
COMSPHERE 392xPlus Modems Table 5-4 (4 of 5) Leased Line Configuration Options — Multiport Mode l AutoDialStandby: Disable Nxt Disable 15min 1hr 4hr Test(2min) Adv 15min Adv 30min Adv 1 hr TestAdv2min Automatic Dial Standby. Permits a modem operating on dial lines (regardless of the method of dialing origination) to check the quality of the leased lines periodically and, if they are good, to disconnect from the dial lines and resume operations on the leased lines.
Configure Branch Table 5-4 (5 of 5) Leased Line Configuration Options — Multiport Mode l TMp TxPre-Value: 5 Nxt 0 1 2 3 4 5 6 7 8 9 A B C D E F This configuration option only appears if Leased-Line Rate is configured for TMp. Trellis Multipoint (TMp) Transmit Preemphasis Value. When the TMp TxPreemphis configuration option is enabled, select a value to control the amount of amplification for frequencies above the carrier frequency to compensate for high-frequency line attenuation.
COMSPHERE 392xPlus Modems Test — Multiport l The Test configuration option determines the duration of a test. Table 5-5 shows the Test configuration option as it appears on the LCD, with the Sync Leased factory default setting (the default value if the modem is just being installed) shown following the colon ( : ) on the first line and with all available selections listed on the second line. Following this is a description of the configuration option.
Configure Branch Misc — Multiport l The Miscellaneous configuration options determine specifics for various functions, including network management parameters and remote modem access. Table 5-6 shows each Misc (Miscellaneous) configuration option as it appears on the LCD, with the Sync Leased factory default setting (the default value if the modem is just being installed) shown following the colon ( : ) on the first line and with all available selections listed on the second line.
COMSPHERE 392xPlus Modems Table 5-6 (2 of 4) Miscellaneous Configuration Options — Multiport Mode l Dir#1_Callback: Disable Nxt Disable Enable Directory Location 1 Callback. This configuration option controls whether or not the modem’s single number callback function is used. Disable – Modem does not use the single number callback function. Enable – Modem answers a call, disconnects, and dials the number stored in directory location 1.
Configure Branch Table 5-6 (3 of 4) Miscellaneous Configuration Options — Multiport Mode l VF_Prompt_Type: 2nd_DialTone Nxt 2nd_DialTone Quiet_Answer This configuration option only appears when the Special Security configuration option is set to RemAccsPswd or CallbkDir#. VF Prompt Type. Determines how the answering modem requests a valid password from the originating modem for the valid password. This configuration option is only used for VF-side password entry and Special Security.
COMSPHERE 392xPlus Modems Table 5-6 (4 of 4) Miscellaneous Configuration Options — Multiport Mode l Diag Connection: Modem(DC) Nxt Modem(DC) NMS(CC) Disable This configuration option does not appear when the LeaseLine Rate is configured for TMp, and NetworkPosition is configured for Tributary. NOTE: TMp tributaries cannot be diagnostically extended, therefore the Diag Connection configuration option is forced to Disable. Diagnostic Connection.
Configure Branch Singleport Mode A In Singleport mode, the modem’s configuration options are arranged into nine groups based on functionality: • DTE Interface (Table 5-7) • DTE Dialer (Table 5-8) • Line Dialer (Table 5-9) • Dial Line (Table 5-10) • Leased Line (Table 4-11) • V.42/MNP/Buffer (Table 5-12) • Test (Table 5-13) • Misc (Table 5-14) • Security (Chapter 12, Dial Access Security) The following graphic represents the structure of the configuration options in Singleport mode.
COMSPHERE 392xPlus Modems Singleport Mode Line Dialer DTE Interface MUX* Port 1* MUX Mode Async/Sync Mode Sync DTE Rate Async DTE Rate Asyn #Data Bits Asyn Parity Bit Asyn #Stop Bits DTR Action DSR Control RTS Action RTS Antistream CTS Control RTS/CTS Delay LSD Control Tx Clock Source Bakup_TXClk_Src XTXC Clamps TXC CT111_Rate Cntl DTE_Rate=VF DTE Alarm Mask Extend Main Ch.
Configure Branch DTE Interface — Singleport Mode A The DTE Interface configuration options contain EIA-232-D (ITU-T V.24) and asynchronous character format information essential for maintaining a connection and for transmitting data between the DTE and the modem.
COMSPHERE 392xPlus Modems Table 5-7 (2 of 8) DTE Interface Configuration Options — Singleport Mode A Async DTE Rate: 19200 Nxt 19200 115200 76800 57600 38400 28800 14400 12000 9600 7200 4800 2400 1200 0–300 This configuration option only appears when Async/Sync Mode is configured for Async. Asynchronous DTE Data Rate. Identifies the asynchronous DTE’s operating rate to the modem. Data rates from 115,200 bps to 300 bps are supported.
Configure Branch Table 5-7 (3 of 8) DTE Interface Configuration Options — Singleport Mode A Asyn #Stop Bits: 1 Nxt 1 2 This configuration option only appears when Async/Sync Mode is configured for Async. Asynchronous Number of Stop Bits. Selects 1 or 2 bits to signal the end of an asynchronous character. NOTE: If the DTE Dialer Type configuration option is set to AT or V.25bis Async, then the total character size must equal 10 bits. Total character size consists of start, data, parity, and stop bits. V.
COMSPHERE 392xPlus Modems Table 5-7 (4 of 8) DTE Interface Configuration Options — Singleport Mode A DSR Control: Stndrd_RS232 (Cont.) Delay to Data – Operation is similar to the Standard RS232 except that DSR does not turn ON until the modem enters Data mode. Normally, the modem raises DSR when it begins the handshaking process. Use this setting when the DTE cannot operate with a long DSR-to-CTS delay (common for V.
Configure Branch Table 5-7 (5 of 8) DTE Interface Configuration Options — Singleport Mode A CTS Control: Stndrd_RS232 Nxt Stndrd_RS232 Forced_On WinkWhenDisc Follows_DTR Follows_RTS Clear-to-Send Control. CTS is a signal from the modem to the DTE indicating that it can accept data from the DTE. Standard RS232 – In Synchronous mode, forces the state of CTS to follow the state of RTS in normal EIA-232-D operation.
COMSPHERE 392xPlus Modems Table 5-7 (6 of 8) DTE Interface Configuration Options — Singleport Mode A LSD Control: Stndrd_RS232 Nxt Stndrd_RS232 Forced_On WinkWhenDisc Follows_DTR Sim_Cntl_Car =DTR/DiscOFF Line Signal Detect Control. LSD is a signal indicating that the carrier signal is being received from the remote modem. It is normally turned OFF to the DTE when the power level of the received carrier signal drops below the carrier detect threshold.
Configure Branch Table 5-7 (7 of 8) DTE Interface Configuration Options — Singleport Mode A Bakup_TXClk_Src: Internal Nxt Internal External RXC_Loop This configuration option only appears in customized installations in which the Dual_Leased_Ln is configured for Enable and Async/Sync Mode is Sync. Backup Transmit Clock Source. Selects the clock reference source when operating in the Dual Leased Line Mode. This is a special mode in which one leased line is used to back up another.
COMSPHERE 392xPlus Modems Table 5-7 (8 of 8) DTE Interface Configuration Options — Singleport Mode A DTE_Rate=VF: Disable Nxt Disable Enable This configuration option does not appear when Async/Sync is configured for Sync. DTE Rate = VF. Forces the DTE’s data rate to be equal to the VF (telephone line) data rate. Disable – The data rate of the connection between the DTE and modem is the value of the Async DTE Rate configuration option.
Configure Branch DTE Dialer — Singleport Mode A The DTE Dialer configuration options establish the DTE-to-modem protocol for call establishment and control. Table 5-8 shows each DTE Dialer configuration option as it appears on the LCD, with the Sync Leased factory default setting (the default value if the modem is just being installed) shown following the colon ( : ) on the first line and with all available selections listed on the second line. Following this is a description of the configuration option.
COMSPHERE 392xPlus Modems Table 5-8 (2 of 5) DTE Dialer Configuration Options — Singleport Mode A AT Escape Char: 043 ASCI Nxt " 043 ASCI This configuration option only appears when DTE Dialer Type is configured for AT. AT Escape Character. The escape sequence (+++) allows you to move from Data mode to Command mode. Use the ATO command to return to Data mode. The ASCII value of the escape character (43 ASCII) can be set to any ASCII value from 0 ASCII to 255 ASCII.
Configure Branch Table 5-8 (3 of 5) DTE Dialer Configuration Options — Singleport Mode A Linefeed Char: 010 Nxt " 010 ASCI This configuration option only appears when DTE Dialer Type is configured for AT. Line Feed Character. Sets the character used to perform a line feed in Command mode for responses from the modem. The AT command is S-Register S4 = n, where n is a value from 0 to 127.
COMSPHERE 392xPlus Modems Table 5-8 (4 of 5) DTE Dialer Configuration Options — Singleport Mode A ResultCode Form: Words Nxt Words Numbers (1) Numbers (2) This configuration option only appears when DTE Dialer Type is configured for AT. Result Codes Format. Controls whether or not result codes appear as words or as numeric codes. Some DTEs do not recognize Result Codes as words; therefore, numbers are required. The Numbers (2) format is required for some modem pooling applications.
Configure Branch Table 5-8 (5 of 5) DTE Dialer Configuration Options — Singleport Mode A V25b NewLineChr: CR+LF End CR+LF CR LF This configuration option only appears when DTE Dialer is configured for V.25bis Async. V.25bis New Line Character. Sets the modem for the command line terminator used by the DTE in V.25bis Async mode. The modem responds to the DTE using the same line terminator.
COMSPHERE 392xPlus Modems Table 5-9 (2 of 4) Line Dialer Configuration Options — Singleport Mode A DialTone Detect: Enable Nxt Enable Disable Dial Tone Detect. Sets the modem for dial tone detection (Enable) or blind dialing (Disable). Enable – Modem disconnects the call if a dial tone is not detected within 10 seconds and displays No Dial Tone on both the LCD and asynchronous DTE terminal. Disable – Modem dials a call whether or not it detects a dial tone on the line. This is known as blind dialing.
Configure Branch Table 5-9 (3 of 4) Line Dialer Configuration Options — Singleport Mode A Fast Disconnect: Disable Nxt Disable Enable Fast Disconnect. Allows the modem to disconnect immediately after receiving a disconnect command from a local DTE or its own diagnostic control panel. Disable – The modem follows its normal disconnect sequence by issuing a cleardown sequence or long space disconnect. This is also known as a graceful disconnect since the other modem receives advance notice of a disconnection.
COMSPHERE 392xPlus Modems Table 5-9 (4 of 4) Line Dialer Configuration Options — Singleport Mode A No Data Disc: Disable Nxt Disable 10min 30min 60min No Data Disconnect. Forces the modem to disconnect if no data is transmitted and received within a specified amount of time. Disable – Modem remains connected despite the lack of data flow. 10, 30, 60 min – Modem disconnects if data is not received and transmitted within 10-minute, 30-minute, or 60-minute intervals.
Configure Branch Dial Line — Singleport Mode A The Dial Line configuration options are used to configure the modem for operation over dial lines. Table 5-10 shows each Dial Line configuration option as it appears on the LCD, with the Sync Leased factory default setting (the default value if the modem is just being installed) shown following the colon ( : ) on the first line and with all available selections listed on the second line. Following this is a description of the configuration option.
COMSPHERE 392xPlus Modems Table 5-10 (2 of 4) Dial Line Configuration Options — Singleport Mode A Automode: Enable Nxt Enable Disable System 85 This configuration option only appears when Dial Line Rate is configured for V.32 or V.34 families data rate. Automode. The modem automatically adapts to the modulation scheme and line rate of the remote modem. However, the maximum data rate the modem uses is determined by the Dial Line Rate configuration option.
Configure Branch Table 5-10 (3 of 4) Dial Line Configuration Options — Singleport Mode A V22b Guard Tone: Disable Nxt Disable 550Hz 1800Hz This configuration option only appears when Dial Line Rate is configured for V.22bis or V.22 data rate, or when Automode is configured for Enable. V.22bis Guard Tone. Determines whether the V.22bis guard tone is disabled, set to 550 Hz, or set to 1800 Hz. Disable – No guard tone.
COMSPHERE 392xPlus Modems Table 5-10 (4 of 4) Dial Line Configuration Options — Singleport Mode A V.34 Precoder: Disable Nxt Disable Enable This configuration option only appears when V.34 is enabled. V.34 Precoder. Determines whether the V.34 Precoder is used when operating with V.34 family modulation on either dial or leased lines. The V.34 Precoder can improve performance under certain unusual line conditions, i.e., low harmonic distortion, single frequency interference. Disable – Does not use the V.
Configure Branch Leased Line — Singleport Mode A The Leased Line configuration options only appear when the Sync Leased factory preset template is selected. They are used to configure the modem for operation over leased lines.
COMSPHERE 392xPlus Modems Table 5-11 (2 of 7) Leased Line Configuration Options — Singleport Mode A LeasedLine Rate: 33600(V34) (Cont.) NOTE: The modem must be in DirectMode before the modulation scheme can be changed from V.32bis, V.34 family, or TMp to another leased-line modulation (V.33, V.29, or V.22bis). See Err Contrl Mode configuration option for more about DirectMode. On leased lines, V.42 error control and BufferMode are only supported by V.32bis, V.34 family, or TMp.
Configure Branch Table 5-11 (3 of 7) Leased Line Configuration Options — Singleport Mode A Gain Hit Thresh: 010 ASCI Nxt " 010 ASCI This configuration option only appears when Autorate is set to GainHit. Gain Hit Threshold. Determines the rate of gain hits required to force the modem to shift to the next lowest line rate. The threshold is specified as a decimal number 0 through 127 inclusive, representing the maximum number of gain hits that will be tolerated in a 15-minute interval.
COMSPHERE 392xPlus Modems Table 5-11 (4 of 7) Leased Line Configuration Options — Singleport Mode A 2W SQ Retrain: Disable Nxt Disable 1 2 3 4 5 This configuration option is available only if Leased Mode is 2WLL-Orig or 2WLL-Ans and affects only V.34, V.32bis, and V.32 modulations. 2-Wire Leased Line Signal Quality Retrain. Forces the modem to retrain if the SQ (Signal Quality) LED is on for more than the specified number of seconds (1–5).
Configure Branch Table 5-11 (5 of 7) Leased Line Configuration Options — Singleport Mode A AutoDialStandby: Disable Nxt Disable 15min 1hr 4hr Test(2min) Adv 15min Adv 30min Adv 1 hr TestAdv2min Automatic Dial Standby. Permits a modem operating on dial lines (regardless of the method of dialing origination) to check the quality of the leased lines periodically and, if they are good, to disconnect from the dial lines and resume operations on the leased lines.
COMSPHERE 392xPlus Modems Table 5-11 (6 of 7) Leased Line Configuration Options — Singleport Mode A V29 TrainOnData: Disable Nxt Disable Enable This configuration option only appears when Leased-Line Rate is configured for V29. V.29 Train On Data. When enabled, the modem receiver can train based upon the incoming data or a training sequence from the distant modem. This function is necessary for a remote (tributary) modem in a V.29 multipoint network and is recommended for a control modem as well.
Configure Branch Table 5-11 (7 of 7) Leased Line Configuration Options — Singleport Mode A Dual_Leased_Ln: Disable End Disable Enable Dual Leased Line. Allows the 2-wire backup facility to function as a 2-wire leased line facility. When this configuration option is disabled, the backup facility is a 2-wire dial line. NOTE: Plug the leased line into the jack labeled DIAL on the rear panel of the modem (see Figure 2-1 in Chapter 2).
COMSPHERE 392xPlus Modems V.42/MNP/Buffer — Singleport Mode A V.42/MNP/Buffer configuration options determine the type of error correction and flow control used by the modems and attached DTEs. Some choices within this group may not appear depending upon how previous configuration options have been selected. Table 5-12 shows each V.
Configure Branch Table 5-12 (2 of 8) V.42/MNP/Buffer Configuration Options — Singleport Mode A Err Contrl Mode: V.42/MNPorBfr (Cont.) The AT command for BufferMode is \N0. The AT command for DirectMode is \N1. The AT command for MNP or Disconnect is \N2. The AT command for MNP or Buffer is \N3. The AT command for V42/MNP or Disconnect is \N4. The AT command for V42/MNP or Buffer is \N5. The AT command for LAPM or Disconnect is \N6. The AT command for LAPM or Buffer is \N7.
COMSPHERE 392xPlus Modems Table 5-12 (3 of 8) V.42/MNP/Buffer Configuration Options — Singleport Mode A EC Fallbck Char: 013 ASCI Nxt " 013 ASCI This configuration option only appears when Async/Sync Mode is configured for Async, and EC Negotiate Buffer is not configured for Disable. Error Control Fallback Character. This configuration option allows you to enter the ASCII value of the error control fallback character.
Configure Branch Table 5-12 (4 of 8) V.42/MNP/Buffer Configuration Options — Singleport Mode A XON/XOFF Psthru: Disable Nxt Disable Enable This configuration option only appears when Async/Sync Mode is configured for Async, Error Control Mode is not configured for DirectMode, and Flow Control of Modem is configured for XON/XOFF. XON/XOFF Passthrough. Considers an XON/XOFF character as data and passes it on to the remote modem.
COMSPHERE 392xPlus Modems Table 5-12 (5 of 8) V.42/MNP/Buffer Configuration Options — Singleport Mode A Send Break Cntl: Data_First End Data_First Break_First This configuration option only appears when Async/Sync Mode is configured for Async, and Error Control Mode is not configured for DirectMode. Send Break Control. Determines what is sent from the modem first, data or break if a break sequence is sent from the DTE.
Configure Branch Table 5-12 (6 of 8) V.42/MNP/Buffer Configuration Options — Singleport Mode A SDC Idle Fill: Flag_Fill Nxt Flag_Fill Mark_Fill This configuration option only appears when the Async/Sync Mode configuration option is set is to Sync and Sync Comp Mode configuration option is not set to DirectMode. Synchronous Data Compression Idle Fill. Determines whether the modem uses an HDLC flag or mark to fill the time between DTE frame transfers.
COMSPHERE 392xPlus Modems Table 5-12 (7 of 8) V.42/MNP/Buffer Configuration Options — Singleport Mode A Sync Flow Cntrl: Tx_Clock Nxt Tx_Clock None CTS_SyncDTE This configuration option only appears when the Async/Sync Mode configuration option is set is to Sync and Sync Comp Mode configuration option is not set to DirectMode. Synchronous Flow Control. Controls the type of synchronous data flow control while using data compression.
Configure Branch Table 5-12 (8 of 8) V.42/MNP/Buffer Configuration Options — Singleport Mode A RdcdAsyncBufSiz: Disable End Disable Enable This configuration option only appears when Async/Sync Mode is configured for Async, and Error Control Mode is configured for BufferMode or V42/MNPorBfr. Reduced Asynchronous Buffer Size. When enabled, the modem’s buffer size is limited to a maximum of 20 characters. The AT command is S-Register S97 = n, where n is 0 for Disable and 1 for Enable.
COMSPHERE 392xPlus Modems Table 5-13 (2 of 2) Test Configuration Options — Singleport Mode A Test Timeout: Disable Nxt Disable 30sec 60sec 240sec Test Timeout. Determines how long a test runs before aborting. Disable – Allows a test to run indefinitely. 30, 60, or 240 seconds – Allows the test to run for 30 seconds, 60 seconds, or 240 seconds. The AT command is S-Register S18 = n, where n is 0 for Disable and 1 to 255 seconds. Rcv Remote Loop: Enable Nxt Enable Disable Receive Remote Loopback Response.
Configure Branch Misc — Singleport Mode A The Miscellaneous configuration options determine specifics for various functions, including network management parameters and remote modem access. Table 5-14 shows each Misc (Miscellaneous) configuration option as it appears on the LCD, with the Sync Leased factory default setting (the default value if the modem is just being installed) shown following the colon ( : ) on the first line and with all available selections listed on the second line.
COMSPHERE 392xPlus Modems Table 5-14 (2 of 5) Miscellaneous Configuration Options — Singleport Mode A Access frm Remt: Enable Nxt Enable Disable Access from Remote. Determines if your modem’s DCP can be accessed by a remote modem via the VF line. CAUTION: If this configuration option is disabled, the modem cannot be accessed by another modem. Enable – Allows access from a remote modem. Disable – Does not allow access from a remote modem.
Configure Branch Table 5-14 (3 of 5) Miscellaneous Configuration Options — Singleport Mode A SpecialSecurity: Disable Nxt Disable RemAccsPswd CallbkDir# This configuration option only appears when the modem is in Dial Only mode or Lease Answer Mode, and Answer Security Mode is configured for No_Answ_Sec. Special Security. Provides two types of security that are not as rigorous as the standard security described in Chapter 12, Dial Access Security.
COMSPHERE 392xPlus Modems Table 5-14 (4 of 5) Miscellaneous Configuration Options — Singleport Mode A NMS_Call_Msgs: CallCnct&Prg Nxt CallCnct&Prg Disable CallCnctOnly CallProgOnly NMS Call Messages. Determines if the modem status and/or call summary information is sent to the NMS. The modem can itemize status, such as CallProgress messages, or it can report a summary of activity, such as Call Connect messages, to the NMS.
Configure Branch Table 5-14 (5 of 5) Miscellaneous Configuration Options — Singleport Mode A Diag Connection: Modem(DC) Nxt Modem(DC) NMS(CC) Disable Diagnostic Connection. Allows the configuration of the serial diagnostic port of the modem to be either a diagnostic channel that is connected to another modem (DC), or a control channel that is connected to a network management device (CC).
COMSPHERE 392xPlus Modems Security — Singleport Mode A The Security configuration options allow you to set the parameters that control how a dial access security password is entered. For security configuration options, refer to Chapter 12, Dial Access Security.
Poll List Branch Poll List Branch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Clear . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Change . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Add . . . . . . . . . . . . . . . . . . . . . . .
COMSPHERE 392xPlus Modems To access PList from the Top-Level menu, make the following selections: Leased:33.6 PList Control F1 Press the F2 F3 key until PList appears. Select PList. Within a network link, a control modem can communicate with a tributary modem by using the tributary modem’s network management address for polling functions. Each TMp tributary modem must have a different network management address.
Poll List Branch If there are modems in the poll list when you select Display, xxx Displays the network management address of the modem in the poll list. yyyyyy Displays either Active or Skip to indicate the poll list in which the network management address is included. Select Nxt to scroll through the entries in the Active or Skip poll lists. To exit this function and remain in the PList Display branch, press the return to the Top-Level menu, press the key. key.
COMSPHERE 392xPlus Modems Change allows you to add modems to the Active poll list (Active), delete modems from both Active and Skip poll lists (Delete), and move modems from the Active to the Skip poll list. Poll List:Chang > Active Delete F1 F3 F2 To implement Change, select the appropriate function (Active, Delete, or Skip). (For Skip, you will need to press the key until Skip appears.
Poll List Branch Add The Add function does not appear in Remote mode or on control modems. Add allows you to add the tributary modem to a control modem’s poll list. This function should be initiated from only one tributary modem at a time. To access Add from the Plist branch, make the following selections: Poll List: Change F1 Press the Add F2 F3 key until Add appears. Select Add.
COMSPHERE 392xPlus Modems Press the key until Acquire appears. Select Acquire. NOTE If an error message (OtherTestActive or Unable To Acquir) appears on the second line of the LCD, move up one level in the menu tree to clear the message and return to the PList Acquire branch. The OtherTestActive message indicates that a test is running which blocks the Acquire function. The Unable To Acquir message indicates that the diagnostic network is in a busy state.
7 Control Branch Control Branch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Speaker . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Data Stream . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Selecting All Ports . . . . . . . . . . . . . . . . .
COMSPHERE 392xPlus Modems To access Control from the Top-Level menu, make the following selections: Leased:33.6 Control F1 Press the F2 Test F3 key until Control appears. Select Control. Speaker Speaker allows you to make temporary adjustments to the modem’s speaker volume. Upon a reset, speaker volume returns to its configured setting. For more information on speaker settings, refer to the Misc section in Chapter 5, Configure Branch.
Control Branch Reset Reset causes the modem to stop operation and perform a complete program restart. The modem begins the power-up test sequence that ends with the Top-Level menu displayed on the LCD. Configuration options stored in an Active (Saved) configuration area are copied to the Active (Operating) configuration area. To access Reset from the Control branch, make the following selection: Control: Speaker F1 > Reset F2 F3 Select Reset.
COMSPHERE 392xPlus Modems Now go to the next screen (Data Stream). Data Stream Port1 Disable F1 F3 F2 The port field (for example, Port1) displays the selected port. The available Data Stream action (Disable or Enable) appears on the second line of the LCD beside the port field. If the modem’s data transmitter is enabled, the word Disable appears to indicate that you may disable the data transmitter by selecting this action. To change the modem’s data stream, press the F2 key.
Control Branch To enable or disable the modem’s data transmitter function on all ports, press the appropriate function key, F1 (Enable) or F3 (Disable). When the message Command Complete appears, press the key to clear the message. Select DS Port All F1 F2 > F3 To change the data stream on all ports again, press the F1 key. or To exit this function and remain in the Control branch, press the the Top-Level menu, press the key. key.
COMSPHERE 392xPlus Modems The port field (xxxxx) displays the currently selected interface. Valid interface selections are Port1, Port2, Port3, Port4, and depending on the set value of the Diagnostic Connection configuration option, CC (NMS Control Channel), or DC (Diagnostic Channel). Refer to Diag Connection configuration option in the Misc section of Chapter 5, Configure Branch. Press the F1 key until the appropriate digital interface appears.
Control Branch To remove the modem from Make Busy mode, press the RemoveMakeBusy appears. key once and the key until Control: RemoveMakeBusy F1 F2 F3 Press any function key to select RemoveMakeBusy. The message Command Complete appears on the LCD. To exit this function and remain in the Control branch, press the the Top-Level menu, press the key. key.
COMSPHERE 392xPlus Modems Press F1 (Service_Line) to switch the modem from its normal dial line to the service line. Service_Line Command Complete F1 F3 F2 The message Command Complete appears. Now, when the modem places a call, instead of using the dial, the call is placed on the service line. To disconnect the modem from the service line and resume normal operation, press the key (returning to Control branch). From the Control branch, press the key until DiscServiceLine appears.
Control Branch Selecting Clone Remote NOTE Clone Remote operations are not supported unless both local and remote modems are 392xPlus modems. (The 3800 or 391x Series modems cannot be used in cloning operations with 392xPlus modems.) To access DwnLoadSoftware from the Control branch, make the following selections: Control: Download_Code F1 F3 F2 Press the key until Download_Code appears. Press any function key to select Download_Code. The DwnLoadSoftware screen appears.
COMSPHERE 392xPlus Modems Clone Remote in Broadcast Configurations A tributary modem configured for extended diagnostics (Diagnostic Connection configuration option set to Modem(DC)) can perform two types of Remote Clone operations. It can clone the upstream, VF connected, control modem (SC_Clone) or it can clone all the 392xPlus modems attached to its downstream Diagnostic Channel (DC_Broadcast).
Control Branch Viewing DC Broadcast Clone Results Choose DLL Type > DC_CloneResults F1 F2 F3 From the Choose DLL Type screen, press the key until DC_CloneResults appears to view the results of the last DC_Broadcast clone operation. If the message Trib List Empty appears, this indicates that a multiple download was never initiated. DC Clone Results Nxt xxx Pass F1 F2 F3 The address field (xxx) displays the network management address of one of the remote modems.
COMSPHERE 392xPlus Modems • For Multiple download configurations, ensure that: — the tributaries are responding properly to polls (this may take several minutes after the control modem powers up). Refer to Chapter 9, Sub-Network Health and Status Branch, for more information. — the control modem’s active poll list contains all the network management addresses for the remote 392xPlus tributary modems that will receive the download (refer to Chapter 6, Poll List Branch).
Control Branch Cloning a Multiple TMp Remote Choose DLL Type > Single Multiple F1 F2 F3 Press the F3 key to select Multiple Clone Remote. After completing this action, proceed to the next section titled Implementing a Clone Remote Operation. Viewing Multiple TMp Clone Results Choose DLL Type > MPtCloneResults F1 F2 F3 From the Choose DLL Type screen, press the key until the MPtCloneResults screen appears to view the results of the last multiple TMp clone operation.
COMSPHERE 392xPlus Modems Implementing a Clone Remote Operation WARNING The modem begins a transfer of its own program to the remote modem. This process takes the communication link out-of-service for a period of time depending on the data rate of the link. If the Clone Remote process is started and then interrupted, the remote modem is left in a partially programmed state in which its functional capabilities are limited to those required to initiate and complete another download attempt.
Control Branch If unsuccessful, the modem remains in the Download Transfer mode. The LCD’s top line displays RemClone Failed and the bottom line displays one of the following messages: Incompat Modulat The modems are connected, but are using a modulation scheme other than V.34 family, V.33, V.32 family, V.29, or TMp. No Response The remote modem is not a 3900 Series modem or the connection between the two modems is poor. Access Disabled The remote modem’s Access from Remote configuration is disabled.
COMSPHERE 392xPlus Modems Automatic Firmware Download New releases may be available for the 392xPlus modem. The latest 392xPlus firmware is available at no charge from the Automatic Firmware Download Center. Refer to the Government Requirements and Equipment Return section in Chapter 1, Introduction, for contact information. To download the firmware, your modem must be configured for dialing.
Control Branch VF Thresholds Update The VF Thresholds Update function allows you to set the thresholds that determine the Health and Status alarm conditions for the VF parameters. Refer to Table 7-1 in this section for VF thresholds and their valid ranges and default values. To access VF_Thresh_Update from the Control branch, make the following selections: Control: < VF_Thresh_Update F1 F2 F3 Press the key until VF_Thresh_Update appears. Press any function key to select VF_Thresh_Update.
COMSPHERE 392xPlus Modems NOTE Note that a warning ( r ) appears on the second line of the screen if you enter an invalid VF threshold (out of range). You cannot save your edits until all thresholds are within their valid range. Refer to Table 7-1 for valid VF threshold ranges. RSL High (- dBm) Nxt " 19 r F1 F2 F3 key to move the cursor to the next position ( 9 ). Press the Select the F2 ( " ) key to change the number above the cursor ( 9 ) to 0.
Control Branch If the edited VF thresholds are valid, the Save command stores them into nonvolatile memory. When the Save completes, the message Save Completed appears. Save VF Thresh Thd Out of Range F1 F2 F3 If the edited VF threshold is invalid (out of range), the error message Thd Out of Range appears. This indicates the Save procedure was unsuccessful. Return to the Edit screen and correct the invalid threshold range. To correct the invalid VF threshold, press the Edit/Save/Reset screen.
COMSPHERE 392xPlus Modems Table 7-1 Valid Ranges for VF Thresholds Valid Ranges VF Thresholds Default Values Receive Signal Level High 0 dBm to –15 dBm Above –9 dBm Receive Signal Level Low –16 dBm to – 50 dBm Below –23 dBm Signal to Noise Ratio 5 dB to 40 dB Below 23 dB Non-Linear Distortion 15 dB to 50 dB Below 30 dB Retrains (per 15 minutes) 1 to 255 trains 15 trains Signal Quality Excellent (lowest) Good Fair Poor No Signal (highest) Good Near Echo 0āć38 dBm Above –20 dBm Far Ec
8 Test Branch Test Branch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Abort . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Self . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Loc Analog Loop . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Rem Digital Loop . . . . . . . . . . . . . . . . . .
COMSPHERE 392xPlus Modems NOTE What Test branch selections are available depends on your modem’s configuration. See the description of each test for more information. To access the Test branch from the Top-Level menu, make the following selections: Leased:33.6 Control F1 Press the F2 Test F3 key until Test appears. Select Test. Abort Abort ends any test that is in progress and brings the modem back to the normal mode of operation. Confirmation is provided by the Command Complete message.
Test Branch Self Self performs an internal self-test of the modem, which takes less than a minute to complete. The modem must be offline; otherwise, Invalid Command appears. WARNING When this test is run in Remote mode, it causes the Remote mode session to be lost. The Remote mode session will reestablish after the self-test completes (usually one or two minutes).
COMSPHERE 392xPlus Modems Loc Analog Loop Loc Analog Loop performs a local analog loopback (ITU-T V.54 Loop 3), Figure 8-1, that verifies modem operation as well as the connection between the DTE and modem. The modem must be offline and in Synchronous or Asynchronous Direct mode to perform this test, otherwise Invalid Command appears.
Test Branch NOTE The test delays 15 to 30 seconds to allow any outstanding network management messages to propagate before the VF channel is interrupted by the test. The message Started appears on the LCD, and the Test LED lights for the duration of the test. If OtherTestActive appears on the LCD, another test is in progress. Select Abort to clear the current test and try again. If the Test Timeout configuration option is enabled, Test Timeout appears at the conclusion of the test.
COMSPHERE 392xPlus Modems To access Rem_Digital_Loop from the Test branch, make the following selections: Test: Rem_Digital_Loop F1 Press the F2 F3 key until Rem_Digital_Loop appears. Press any function key to start this test. Pick Test Port > Port1 Port2 F1 F2 F3 Select the appropriate port by pressing the corresponding function key. Press the scroll other ports into view. key to This screen does not appear in Singleport mode.
Test Branch Loc Digital Loop Loc Digital Loop is issued by a local modem and forces it to loopback any data received from the remote modem (Figure 8-3). (This test operates the same as a ITU-T V.54 Loop 2 except it is issued at your modem.) This is useful if a remote modem is incapable of initiating a remote digital loopback from its location. For this test to operate properly, the modems must be operating at the same rate and in Synchronous or Asynchronous Direct mode.
COMSPHERE 392xPlus Modems This screen does not appear in Singleport mode. Test:P1:Dig Loop Started F1 F2 F3 The message Started appears on the LCD and the Test LED lights. The port field (for example, P1 for Port 1) displays the port that is currently selected. You may see P1, P2, P3, or P4. If OtherTestActive appears on the LCD, another test is in progress. Select Abort to clear the current test and try again.
Test Branch Figure 8-5. Pattern Test and Digital Loopback Test Figure 8-6. End-to-End Pattern Test To access Pattern from the Test branch, make the following selections: Test: Pattern F1 Press the < F2 F3 key until Pattern appears. Select Pattern to start this test.
COMSPHERE 392xPlus Modems Select the appropriate port by pressing the corresponding F key. Press the ports into view. key to scroll other The Pick Test Port screen does not appear in Singleport mode. Test:P1:Pattern Started F1 F3 F2 The message Started appears on the LCD and the Test LED lights. The port field (for example, P1 for Port 1) displays the port that is currently selected. You may see P1, P2, P3, or P4.
Sub-Network Health and Status Branch 9 Sub-Network Health and Status Branch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-1 Sub-Network Health and Status Branch The Sub-Network Health and Status (SubHS) function is not available on multipoint tributary modems or with certain modulations (V.29, V.33, V.22bis, and V.27bis). The SubHS branch of the Top-Level menu allows you to display alarm conditions in downstream modems.
COMSPHERE 392xPlus Modems Press the key until SubHS appears. Select SubHS. NOTE If there are no modems in the poll list, the message Poll List Empty! appears on the second line of the LCD. Sub-network HS Nxt xxx yyyyyy F1 F2 F3 When you select SubHS, xxx Displays the network management address of the downstream modem selected. yyyyyy Displays the status of the downstream modem. This message is updated every several seconds to display the latest status.
Call Setup Branch 10 Call Setup Branch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Dial . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Disconnect . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Answer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Dial Standby/Return to Dial . . . . . . . . .
COMSPHERE 392xPlus Modems “Status” Status Configure PList Control Test Disconnect Answer Security Remote Call_Setup (Dial Backup only) Dial Tlk/Data SubHS Change_Directory Dial_Standby or Return_to_Dial Directory_Status (Does not appear in North America) Directory Locations 1 - 24 To access the Call Setup branch from the Top-Level menu, make the following selections: Leased:33.6 Call_Setup F1 Press the F3 F2 key until Call_Setup appears. Select Call Setup.
Call Setup Branch Select Dial to display the first directory telephone number. DialDirectory: Nxt 01:5551234 F1 F3 F2 To view other directory locations, select Nxt. DialDirectory: Nxt 02:3219876 F1 F3 F2 Once the directory location you want appears on the LCD, press the F2 or F3 key to dial the number. DialDirectory:01 Off Hook F1 F2 F3 The Call Setup status Off Hook appears during the connection process.
COMSPHERE 392xPlus Modems Disconnect For dial backup applications, use this function when you want to disconnect an established call on a dial line. For leased backup applications, use this function to switch between the primary leased line and the backup leased line. To access Disconnect from the Call Setup branch, make the following selection: Call Setup: Dial Disconnect F1 F2 > F3 Select Disconnect.
Call Setup Branch Answer For dial backup applications, Answer allows the modem to go off-hook, generate an answer tone, and begin the handshaking process with the calling modem. Use the Answer function when the Auto-Answer Ring Count configuration option is disabled. (Refer to the Line Dialer section in Chapter 5, Configure Branch.) For leased backup applications, Answer allows the modem to begin a “handshake” process with the remote modem.
COMSPHERE 392xPlus Modems Under normal backup conditions, when a problem occurs on the primary leased line, the modems establish a connection over the backup network. Call Setup: Dial Standby F1 F3 F2 When this occurs, the Dial Standby function appears on the LCD. If you select Dial Standby, the modem switches back to the primary leased-line while still maintaining the backup connection. As a result, the Return_to_Dial function appears on the LCD instead of Dial Standby.
Call Setup Branch If the modem is operating in a Dial Backup mode, the Dial Standby function forces the modem to primary leased-lines and the LCD displays the status message Command Complete. Once the modem is in Dial Standby mode, Return_to_Dial appears on the LCD. Selecting this function forces the modem to backup networks and the LCD displays the status message Command Complete. To exit this function and remain in the Call Setup branch, press the to the Top-Level menu, press the key. key.
COMSPHERE 392xPlus Modems Entering Telephone Numbers and Dial Command Modifiers into Directory Locations The following example uses an empty directory location for describing how to enter a telephone number. If you want to change an existing telephone number in any of the 24 directory locations, follow the same procedures. To add a telephone number to a directory location, make the following selections: 02:z Nxt F1 " F2 # F3 Select Nxt until a blank directory appears on the LCD.
Call Setup Branch Table 10-1 Valid Dial Command Modifiers Dial command modifiers are parameters entered in the dial command string which specify how, when, and what number to dial. The following is a list of parameters the 392xPlus modems recognize: T — Tone (DTMF) dial. Any digit 0–9, *, or # can be dialed as tone. P — Pulse dial. Only the digits 0–9 can be dialed in Pulse Dial mode.
COMSPHERE 392xPlus Modems Directory Status (may not appear for certain countries) Directory Status displays the status of each directory location. To access Directory Status from the Call Setup branch, make the following selections: Press the key until Directory_Status appears. Press any function key to select Directory_Status. Call Setup: Directory_Status F1 F2 < F3 Press the key until Directory_Status appears. Press any function key to select Directory_Status.
Talk/Data Branch 11 Talk/Data Branch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-1 Manual Dialing When the Remote Modem is Configured for Auto-Answer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-2 Manual Dialing When the Remote Modem is Configured for Manual Answer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
COMSPHERE 392xPlus Modems Manual Dialing When the Remote Modem is Configured for Auto-Answer NOTE On the remote modem, the Line Current Disconnect configuration option (refer to the Line Dialer section in Chapter 5, Configure Branch) must be set to Disable. This configuration option does not appear on Models 3920-A1-401, 411 and 3921-B1-001, 011. If you are originating a call using a telephone and the remote modem is configured for Auto-Answer, perform the following procedure. Idle:33.
Talk/Data Branch Manual Dialing When the Remote Modem is Configured for Manual Answer NOTE On both modems, the Line Current Disconnect configuration option (refer to the Line Dialer section in Chapter 5, Configure Branch) must be set to Disable. If you are originating a call using a telephone and the remote modem is configured for Manual Answer, perform the following procedure. Once the remote telephone is answered by the remote user, you must both decide when to place the modems into Data mode.
COMSPHERE 392xPlus Modems 11-4 October 1998 3920-A2-GH30-40
Dial Access Security 12 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Originate Access Security . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Answer Access Security . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . VF-Side Passwords . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . DTE-Side Passwords . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
COMSPHERE 392xPlus Modems The COMSPHERE 392xPlus modems use an outbound and inbound method of security known respectively as Originate Access and Answer Access security. Both methods of security require some type of password entry whether it be included as part of an AT command dial string or entered directly from a remote user’s DTE. Originate Access Security Originate Access lets you control who can originate a call from a local modem via the AT command set.
Dial Access Security VF-Side Passwords VF-side password entry occurs between modems prior to connecting. Once the VF-side password is entered, no other user intervention is required since security negotiation is handled solely by the modems. When the answering modem is configured for VF entry technique, it goes off-hook and transmits to the originating modem either a secondary dial tone or silence (this choice depends on how the VF Prompt Type option is configured).
COMSPHERE 392xPlus Modems DTE-Side Passwords DTE-side password entry requires the originating user to supply a valid password via the DTE. This method of password entry occurs after the modems’ training sequence, but before normal connection. The modems must be configured for asynchronous operation to use this type of security. When using DTE-side password entry, the modems go through their normal training and error control negotiation.
Dial Access Security Security Branch The Security branch of the Top-Level menu allows you to change and save parameters that are critical to the dial access security password database. This database is a collection of passwords and their associated parameters that determine how the modems control password access. Most of the functions within this branch are protected by an Administrative Password. Once the correct password is entered, these security functions display on the modem’s LCD.
COMSPHERE 392xPlus Modems Set Access Ctrl Set Access Control allows you to configure critical parameters contained within the security database table that control dial access security. These parameters are protected by an Administrative Password, which is an 8-digit decimal number. Set Access Control contains the Edit Password Table, Set Answer Security, Set Originate Security, and Set Administrative Password security configuration groups.
Dial Access Security Press the key to scroll the Set Answer Security, Set Originate Security, and Set Administrative Password groups into view. If an incorrect administrative password is entered, then the message PassWrd Invalid appears as well as the last password entered. Enter the correct password value or press the or key to exit the Security branch. EditPasswdTable The Password Table is the modem’s security database.
COMSPHERE 392xPlus Modems Select Index Ent "0001 F1 F2 F3 Select Index appears. Press the F2 ( " ) key to increment index values. Press the key to move the cursor to the next position. Continue this sequence until the desired index appears, and then press the F1 key to select Ent. If an index outside of the range is entered, the message Index Too Big appears. Choose an index from the database’s current index range.
Dial Access Security Table 12-1 describes the settings of the Edit Table Password group options. Table 12-1 Edit Password Table Group Options PsWdType xxxx Nxt Cleared DTE_Entry VF_Entry VF_plus_DTE Password Type. Indicates whether this index location is configured for VF-side password, DTE-side password, or both. Cleared displays for an index location that contains no valid entry. Note that this configuration option only identifies the type of password used.
COMSPHERE 392xPlus Modems Set Answer Sec Set Answer Security determines if dial access security is enabled or disabled. This method of inbound security is configured in the answering modem. Although this also appears under the Security Configuration Option group, it can only be changed from the Set Answer Sec LCD display in the Security branch.
Dial Access Security Set Orig Sec Set Originate Security controls whether or not the modem can originate a call using AT commands when the dial access security feature is installed. This method of outbound security only applies to modems originating a call. To access Set_Orig_Sec from Set Access Ctrl, make the following selections: Set Access Ctrl Set_Orig_Sec F1 Press the F2 F3 key until Set_Orig_Sec appears. Select Set_Orig_Sec.
COMSPHERE 392xPlus Modems Set Admin PsWd Set Administrative Password is used to change the Administrative Password value. The Administrative Password is an 8-digit decimal number that allows authorized users to enter the Access Security Control function. NOTE If this value is forgotten, then the only way to access any of the security functions is by selecting Reset Security. This restores the password to a known value, but erases the contents of the modem’s security database.
Dial Access Security Reset Security Reset Security is the second major function within the Security branch of the Top-Level menu. It erases all contents of the security database table and resets all index locations to Cleared. Two selections appear under Reset Security: Abort Security Reset and Erase All PassWords. Use Reset Security if you want to redo the entire security database table. CAUTION This function can be used as a last resort if the Administrative Password is no longer known.
COMSPHERE 392xPlus Modems This concludes the description of the functions found in the Security branch of the Top-Level menu tree. The following section describes the security configuration options found within the Configure branch of the Top-Level menu tree. Security Configuration Options The Security Configuration Options group allows you to view and set dial access security parameters. This group is located in the Configuration branch of the Top-Level menu. It only appears if the mux is disabled.
Dial Access Security Table 12-4 (2 of 3) Security Configuration Options DTE_PW_TermChar: 013 Nxt " 013 This configuration option does not appear if Answer Security Mode is configured for No_Answ_Sec. DTE Password Termination Character. Allows you to change the ASCII character used to indicate the end of a password or User ID entered by an originating user. This character can be set to any ASCII value except those representing alphanumeric characters (A–Z, a–z, and 0–9).
COMSPHERE 392xPlus Modems Table 12-4 (3 of 3) Security Configuration Options Originate_Secur: No_OrigSec End No_OrigSec Ena_Orig_Sec Originate Security Mode. This configuration option is read-only and cannot be changed from the Configuration branch. The setting of this configuration option can only be changed in the Set Orig Sec group found in the Security branch. No Originate Security – Disables originate security so that a modem can originate a call using AT commands.
Dial Access Security NOTE While pulse dial can be used to originate the call, DTMF tones must be used for the password. This can be accomplished by using the P and T modifiers appropriately. Refer to the Dial command in Chapter 14, AT Command Set and S-Registers, for more on modifiers. A DTE-side password is entered after the modems have trained, but before a normal connection is established.
COMSPHERE 392xPlus Modems Database Table Examples The following examples illustrate possible database tables in which the password type is configured for VF Entry, DTE Entry or a combination of VF, DTE, and VF plus DTE Entry. These tables are shown for illustrative purposes only. Passwords shown are not representative of good password selections. NOTE The Assigned to column in Table 12-5 is not stored in the modem. Table 12-5 is an example of a database table with passwords configured for VF Entry only.
Dial Access Security Table 12-7 is an example of a security database table that uses a mixture of VF and DTE passwords.
COMSPHERE 392xPlus Modems This page intentionally left blank.
Dial Access Security NOTE This page is self-supporting and can be removed for security reasons. 00282600 The following provides instructions to clear the dial access security alarm light from the modem’s front panel: Press the key to return to the Top-Level menu. Press F1 to access the Status branch. Press F1 again to access the DevHs branch. Press F3 to access the Security branch. From the Security branch, press F1 twenty (20) times. The security alarm light clears.
COMSPHERE 392xPlus Modems 12-22 October 1998 3920-A2-GH30-40
Remote Branch 13 Remote Branch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13-1 Remote Branch The Remote branch of the Top-Level menu allows you to control the remote modem’s DCP using the local modem’s DCP. This function allows you to change configuration options and control test functions in a remote modem. Any changes made to configuration options while using the Remote branch are not saved until you exit the Remote branch.
COMSPHERE 392xPlus Modems The following conditions must be met before using the Remote branch: • A connection using either leased lines or the dial network must be established. • The Access from the Remote configuration option must be enabled in the remote modem. • In point-to-point networks, the Remote Access Password configuration option must be the same for both the local and remote modems. In multipoint networks the remote access password must be entered at the appropriate prompt.
Remote Branch For Trellis Multipoint (TMp) control modems, you must specify the network management address of a tributary modem. The following display does not appear in point-to-point or Trellis Multipoint tributary modems. Choose Address: Ent "xxx F1 F3 F2 The address field (xxx) displays the network management address of the modem to be accessed by the Remote function. The valid address field range is from 001 to 256.
COMSPHERE 392xPlus Modems displays and press any function key. Primary channel operation is not available when initiating a Remote function from a TMp tributary modem. Leased:33.6 Control ExitRem F1 F3 F2 If the remote modem accepts the password and the entry is successful, the Top-Level menu of appears in the upper right-hand the remote modem appears on the local modem’s LCD. An corner indicating that what is displayed on your LCD is actually the Top-Level menu of the remote 392xPlus modem.
14 AT Command Set and S-Registers Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Command and Data Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Switching Between Data Mode and Online Command Mode . . . . . . . . . Escape Sequence and Escape Guard Time . . . . . . . . . . . . . . . . . . . . . . Command Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
COMSPHERE 392xPlus Modems Escape Sequence and Escape Guard Time The escape sequence is only issued when the modem is online and in Data mode. The 392xPlus modems use three consecutive plus ( + ) characters as the escape sequence. (To change this value, refer to S-Register S2 discussed later in Table 14-3 in the S-Register Format section.
AT Command Set and S-Registers Result Codes Table 14-1 lists all valid result codes for the 392xPlus modems.
COMSPHERE 392xPlus Modems Table 14-1 (2 of 3) Result Codes Numbers (1) Numbers (2) 22 12 CONNECT 9600/ EC** Connection at 9600 bps with error control 23 16 CONNECT 12000/ EC** Connection at 12,000 bps with error control 24 13 CONNECT 14400/ EC** Connection at 14,400 bps with error control 25 17 CONNECT 16800/ EC** Connection at 16,800 bps with error control 26 15 CONNECT 7200/ EC** Connection at 7200 bps with error control 27 5 CONNECT 1200/ EC*** Connection at 1200 bps with error
AT Command Set and S-Registers Table 14-1 (3 of 3) Result Codes Numbers (1) Numbers (2) 42 42 CONNECT 33600* Connection at 33,600 bps 43 43 CONNECT 21600/ EC** Connection at 21,600 bps with error control 44 44 CONNECT 24000/ EC** Connection at 24,000 bps with error control 45 45 CONNECT 26400/ EC** Connection at 26,400 bps with error control 46 46 CONNECT 28800/ EC** Connection at 28,800 bps with error control 47 47 CONNECT 31200/ EC** Connection at 31,200 bps with error control 4
COMSPHERE 392xPlus Modems Table 14-2 (1 of 10) 392xPlus AT Commands AT Command Description DCP LCD Command Sequence A/ Repeat Last Command. Reexecutes last command string. (Not to be preceded with AT or followed by pressing the Return key.) Call Setup\ Answer A Answer Mode. Goes off-hook and attempts to establish a connection without waiting for a ring. None Dn Dial. Begins the dialing sequence. The dial string n (modifiers and telephone number) is entered after the D command.
AT Command Set and S-Registers Table 14-2 (2 of 10) 392xPlus AT Commands AT Command DS=n En Description Dial Stored Number. Dials the number stored in Location n (1–24). (To store a telephone number, refer to the &Zn=x command.) Call Setup\Dial\ Dial Directory Command Character Echo. Configure\Edit\ DTE Dialer E0 E1 Hn DCP LCD Command Sequence Disables echo to the DTE. Enables echo to the DTE. Hook Switch Control. H0 H1 H0: Call Setup\ Disconnect or Control\Remove Make Busy Modem goes on-hook.
COMSPHERE 392xPlus Modems Table 14-2 (3 of 10) 392xPlus AT Commands AT Command Xn DCP LCD Command Sequence Description Extended Result Code, Dial Tone Detect, and Busy Tone Detect Configuration Options. X0 X1 X2 X3 X4 X5 X6 X7 Extended Result Code: Dial Tone Detect: Busy Tone Detect: Disable Enable Enable Enable Enable Add/EC Add/V42.
AT Command Set and S-Registers Table 14-2 (4 of 10) 392xPlus AT Commands AT Command &Cn &Dn Description LSD Control. &C0 Forced On. LSD ON at all times. &C1 Standard RS232. LSD is ON when the remote modem’s carrier signal is detected. LSD is OFF when carrier signal is not detected. &C2 Wink When Disconnect. LSD normally forced ON, turns OFF for approximately one second upon disconnecting. &C3 Follows DTR. State of LSD follows state of DTR. &C4 Simulated Control Carrier.
COMSPHERE 392xPlus Modems Table 14-2 (5 of 10) 392xPlus AT Commands AT Command &Gn Description V.22bis Guard Tone. &G0 &G1 &G2 DCP LCD Command Sequence Configure\Edit\ Dial Line Disable. 550 Hz. 1800 Hz. NOTE: The V.22bis Guard Tone cannot be disabled in some countries. &In Dial Transmit Level. Configure\Edit\ Dial Line The AT command is &In, where n is: 0 for – 0 dBm 1 for –1 dBm • • • 32 for –32 dBm NOTE: In North America the range of allowable values is –10 dBm to –32 dBm.
AT Command Set and S-Registers Table 14-2 (6 of 10) 392xPlus AT Commands AT Command &Mn and &Qn Description Async/Sync Mode and DTE Dialer Type. &M0, &Q0 Modem operates in Asynchronous mode using AT Command protocol. &M1, &Q1 Modem operates in Synchronous mode using AT Command protocol. &M2, &Q2 Modem operates in Synchronous mode and dials telephone number stored in directory location 1 when DTR signal turns OFF and then ON. &M3, &Q3 Modem operates in Synchronous mode using AT Command protocol.
COMSPHERE 392xPlus Modems Table 14-2 (7 of 10) 392xPlus AT Commands AT Command &Tn Description Tests. &T0 &T1 &T2 &T3 &T4 &T5 &T6 &T7 &T8 &T9 &Vn &Wn &X1 &X2 &T4 and &T5: Configure\Edit\ Tests None Active (Operating) configuration options. Active (Saved) configuration options. Customer 1 configuration options. Customer 2 configuration options. Directory locations 1–24. Configure\Save Saved to Active(Save). Saved to Customer 1. Saved to Customer 2. Transmit Clock Source. &X0 14-12 Abort.
AT Command Set and S-Registers Table 14-2 (8 of 10) 392xPlus AT Commands AT Command &Zn=x DCP LCD Command Sequence Description Store Telephone Numbers. Modem saves the telephone numbers and dial command modifiers (if any) entered for x (up to 40 characters in length) in Directory Location n (1–24). For example, the command AT&Z1 = 5551234 stores the telephone number 555-1234 into directory location 1.
COMSPHERE 392xPlus Modems Table 14-2 (9 of 10) 392xPlus AT Commands AT Command \Nn Description Asynchronous Error Control Mode. \N0 \N1 \N2 \N3 \N4 \N5 \N6 \N7 \Qn \Tn Configure\Edit\ V42/MNP/Buffer Buffer Mode. Direct Mode. MNP or Disconnect. MNP or Buffer. V.42/MNP or Disconnect. V.42/MNP or Buffer. LAPM or Disconnect. LAPM or Buffer. Asynchronous Flow Control of DTE, Asynchronous Flow Control of Modem.
AT Command Set and S-Registers Table 14-2 (10 of 10) 392xPlus AT Commands AT Command #Qn Description Synchronous Flow Control of DTE. #Q0 #Q1 #Q2 #SCn Synchronous Data Compression Mode. #SC0 #SC1 3920-A2-GH30-40 No flow control. Flow control using transmit clock (circuit 114). Flow control using CTS (circuit 106). Disable Synchronous Data Compression mode. Enable Synchronous Data Compression mode.
COMSPHERE 392xPlus Modems S-Register List S-Registers affect the operating parameters of the 392xPlus modems. S-Registers are only applicable when the DTE Dialer Type configuration option is set for AT. (Refer to the &Mn and &Qn commands.) Table 14-3 lists all S-Registers supported by the 392xPlus modems. The first column lists the S-Register. The second column lists all possible values for that register. The third column lists the key sequence used to enter the equivalent from the DCP.
AT Command Set and S-Registers Table 14-3 (1 of 15) 392xPlus S-Registers S-Register Description S0 Auto-Answer Ring Number1. Register determines number of rings the modem will count before automatically answering a call. DCP LCD Command Sequence Configure\Edit\ Line Dialer Enter zero (0) if you do not want the modem to automatically answer any calls. Otherwise, enter a value from 1–255 for the number of rings to count before answering. The factory setting is 1. S2 AT Escape Character.
COMSPHERE 392xPlus Modems Table 14-3 (2 of 15) 392xPlus S-Registers S-Register Description S12 Escape Guard Time. Register sets the value (in 20-millisecond increments) for the required pause before and after the escape sequence is issued. The guard time prevents the modem from interpreting data as the escape sequence characters. DCP LCD Command Sequence Configure\Edit\ DTE Dialer Enter a value from 0–255 in 20-millisecond increments. The factory setting of 50 equals 1000 milliseconds or one second.
AT Command Set and S-Registers Table 14-3 (3 of 15) 392xPlus S-Registers S-Register Description S23 Proactive Retrain. Determines whether the modem automatically retrains if the Signal to Noise ratio drops 1.2 dB. DCP LCD Command Sequence Configure\Edit\ Dial Line Register has the following values: 0 = Enable 1 = Disable The factory setting is Enable. S24 Rate Auto Orig. Register selects the maximum leased line rate at which the modem will run before a rate fallback causes an automatic dialup.
COMSPHERE 392xPlus Modems Table 14-3 (4 of 15) 392xPlus S-Registers S-Register Description S28 Port4 Ext Alarm. Register determines whether Port 4 is used to pass user data or to monitor for external alarms. Register has the following values: 0 = Disable 1 = EnableLow 4 = EnableHigh DCP LCD Command Sequence Configure\Edit\ DTE Interface\MUX The factory setting is Disable. S30 Sync DTE Rate. Register determines the modem’s synchronous DTE rate (transmit clock/receive clock frequency).
AT Command Set and S-Registers Table 14-3 (5 of 15) 392xPlus S-Registers S-Register Description S33 Mixed Trib F/W. Mixed tributary firmware. Establishes that a multipoint network has modems using mixed firmware (prior to and after Release M02.00xx). DCP LCD Command Sequence Configure\Edit\ Misc Register has the following values: 0 = No 1 = Yes The factory setting is No. S35 SDC Negotiation. Controls negotiation between two modems attempting to connect using SDC.
COMSPHERE 392xPlus Modems Table 14-3 (6 of 15) 392xPlus S-Registers S-Register S41 Description Dial Line Rate. Register determines the modem’s data rate and modulation scheme for operation on dial lines. DCP LCD Command Sequence Configure\Edit\ Dial Line Register has the following values: 1 = 14,400 (V.32bis) 2 = 12,000(V.32bis) 3 = 9600 (V.32bis) 4 = 7200 (V.32bis) 5 = 4800 (V.32bis) 6 = 2400 (V.22bis) 7 = 1200 (V.22) 8 = 1200 (212A) 10 = 0–300 (V.21) 11 = 0–300 (103J) 12 = 1200/75 (V.
AT Command Set and S-Registers Table 14-3 (7 of 15) 392xPlus S-Registers S-Register Description S44 Leased-Line Rate. Register determines the modem’s data rate and modulation scheme for operation on either 2-wire or 4-wire leased lines in either Answer or Originate mode. DCP LCD Command Sequence Configure\Edit\ Leased Line Register has the following values: 1 = 14,400 (V.32bis) 2 = 12,000 (V.32bis) 3 = 9600 (V.32) 4 = 7200 (V.32bis) 5 = 4800(V.32) 6 = 2400 (V.22bis) 11 = 14,400 (V.33) 12 = 12,000 (V.
COMSPHERE 392xPlus Modems Table 14-3 (8 of 15) 392xPlus S-Registers S-Register S46 Description Automatic Dial Backup. Register determines if the modem performs an automatic dial backup if the leased lines fail. DCP LCD Command Sequence Configure\Edit\ Leased Line Register has the following values: 0 = Disable 1 = Enable The factory setting is Disable. S47 Automatic Dial Standby. Register determines if the modem performs an automatic dial standby if in Dial Backup mode.
AT Command Set and S-Registers Table 14-3 (9 of 15) 392xPlus S-Registers S-Register S52 Description DTE LL (CT141). Register determines if the modem performs a local analog loopback if it receives a CT141 signal from the DTE. DCP LCD Command Sequence Configure\Edit\ Tests Register has the following values: 0 = Disable 1 = Enable 2 = Fast The factory setting is Disable. S53 V.54 Address. Identifies the address of the modem to be placed in a loopback test.
COMSPHERE 392xPlus Modems Table 14-3 (10 of 15) 392xPlus S-Registers S-Register S61 Description CT111 Rate Control. Register determines if CT111 Rate is disabled, set for Fallback 1 or Fallback 2. DCP LCD Command Sequence Configure\Edit\ DTE Interface CT111 Rate allows the DTE to control modem rate via Pin 23 of the EIA-232-D interface. This configuration option determines the effect of the DTE Rate Control signal. It is only valid in Async Direct mode and Synchronous mode.
AT Command Set and S-Registers Table 14-3 (11 of 15) 392xPlus S-Registers S-Register S66 Description NMS Call Messages. Register determines if the modem sends information regarding status (Call Progress) and/or sends summarized call statistics (Call Connect) to the 6700 Series Network Management System (NMS).
COMSPHERE 392xPlus Modems Table 14-3 (12 of 15) 392xPlus S-Registers S-Register S74 Description Network Position Identification. Register identifies each modem as either a control or tributary modem. DCP LCD Command Sequence Configure\Edit\ Misc Register has the following values: 0 = Tributary 1 = Control The factory setting is Tributary. S75 Network Management Address. Register determines the modem’s network address. This address is used when accessing the modem from the 6700 Series NMS.
AT Command Set and S-Registers Table 14-3 (13 of 15) 392xPlus S-Registers S-Register S84 Description AT Command Mode. Register determines how the modem responds to valid and invalid AT commands. DCP LCD Command Sequence Configure\Edit\ DTE Dialer Register has the following values: 0 = Normal 1 = No ERROR 2 = No Strap or ERROR The factory setting is Normal. S85 Fast Disconnect.
COMSPHERE 392xPlus Modems Table 14-3 (14 of 15) 392xPlus S-Registers S-Register S90 Description DTE Rate = VF. Register allows the DTE’s data rate to be equal to the VF (telephone line) data rate. If Enabled, the data rate between the DTE and modem is the same as the modem’s VF data rate. As a result, when the modem is in Data mode, the speed of the data passed between the modem and DTE occurs at the VF data rate.
AT Command Set and S-Registers Table 14-3 (15 of 15) 392xPlus S-Registers S-Register Description S96 Trellis Multipoint (TMp) Tx Preemphasis. Provides amplification for frequencies above the carrier frequency to compensate for high frequency line attenuation. DCP LCD Command Sequence Configure\Edit\ Leased Register has the following values: 0 = Enable 1 = Disable The factory setting is Enable. S97 Reduced Asynchronous Buffer Size. Register limits the modem’s buffer size to a maximum of 20 characters.
COMSPHERE 392xPlus Modems 14-32 October 1998 3920-A2-GH30-40
Menu Tree A Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1 Overview Pages A-2 and A-3 provide a menu tree for the 392xPlus modems.
COMSPHERE 392xPlus Modems Displays current status of modem along with data rate and error control mode. "Status" Status Configure PList Ld EditArea frm: Activ (Operating) Identity VF Major Minor Status Dial Thresh Security Port1 Port2 Port3 Port4 Backup SDC V.
Menu Tree (Singleport mode only) from previous page Control Test SubHS Call_Setup Tlk/Data Security (Dial Backup only) Dial Answer Disconnect Choose Address (TMp Control only) Change_Directory Choose Password (TMp only) Dial_Standby or Return_to_Dial Secondary Directory Locations 1 – 24 Self Abort Rem_Digital_Loop Loc_Analog_Loop Loc_Digital_Loop Set_Access_Ctrl Data_Stream Reset Make_Busy or RemoveMakeBusy EIA_LEDS Reset_Security (Admin Password?) Download_Code (DownloadSoftware)
COMSPHERE 392xPlus Modems A-4 October 1998 3920-A2-GH30-40
Troubleshooting B Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-1 Overview This appendix points out basic problems that can occur when operating a 392xPlus modem. Use Tables B-1 through B-8 to check out these problems. If you are having data communication difficulties, such as periodic character loss, random errors, or constant format errors, use the loopback tests described in Chapter 8, Test Branch.
COMSPHERE 392xPlus Modems Table B-2 Leased-Line Operation Action Symptom The modems do not train-up on leased lines. Verify that the correct cabling is used for your application. Refer to Chapter 2, Modem Installation. Verify that one modem is configured for Answer mode and the other is configured for Originate mode. (For TMp operation one modem must be configured as a control modem and the other as a tributary modem.) Verify that both modems are using the same modulation scheme.
Troubleshooting Table B-4 Modem — DTE Connection Action Symptom The modem does not accept or echo back AT commands. Verify that the cable between the Async port of the DTE and the modem is a standard RS-232 cable. (Null modem cables, also known as crossover cables, do not work in this application.) Verify that the Command Character Echo configuration option is enabled. Refer to DTE Dialer in Chapter 5, Configure Branch. Verify that the DTE Dialer Type configuration option is set to AT.
COMSPHERE 392xPlus Modems Table B-5 (1 of 2) Modem — VF Connection Action Symptom The modem does not receive a dial tone. Attach a telephone directly to the telephone line to verify that a dial tone exists. The modem does not go off-hook and answer an incoming call. Verify that the Auto Answer Ring Count configuration option is set to a value other than 0 (disable). Refer to Line Dialer in Chapter 5, Configure Branch. Make sure the VF line is connected to the modem’s rear jack labeled DIAL.
Troubleshooting Table B-5 (2 of 2) Modem — VF Connection Symptom Action Intermittent disconnects, high error rates, or excessive retransmissions occur. Perform an End-to-End test. Refer to Pattern located in Chapter 8, Test Branch. The modem establishes and then disconnects the call. You may have a poor VF connection. Try dialing again. The remote modem may have encountered an error control (EC) disconnect. If the modems cannot negotiate EC, then a disconnect occurs.
COMSPHERE 392xPlus Modems Table B-8 MUX Operation Action Symptom The MUX configuration option does not appear under DTE Interface. The Dial Access Security feature is enabled. Verify that both the Answer and Originate security options are disabled. Refer to sections Set Answer Sec and Set Orig Sec in Chapter 12, Security. The Dial Line Rate or LeasedLine Rate configuration option is set to an invalid modulation.
Pin Assignments Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . EIA-232-D Pin Assignments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . VF Connector Pin Assignments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Auxiliary Cables Not Supplied . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
COMSPHERE 392xPlus Modems EIA-232-D Pin Assignments Table C-1 lists the EIA-232-D pin assignments for the modem.
Pin Assignments VF Connector Pin Assignments Table C-2 lists the connector pin assignments for Model 3920Plus modular jacks as well as the pin assignments for the TELCO jacks. (See Figure C-1.) Table C-2 VF Connector Pin Assignments Type of Telco Jack Pin Leased Dial RJ11 JM8 1 4-Wire: TX 2-Wire: TX/RX Ring 1 2 4-Wire: TX 2-Wire: TX/RX Tip 1 6-Pin Leased 3 4 Ring Ring Ring 5 Tip Tip Tip 6 7 4-Wire: RX Tip 8 4-Wire: RX Ring Figure C-1.
COMSPHERE 392xPlus Modems Auxiliary Cables Not Supplied To add an external telephone to your modem, use an external “Y” cable to connect the phone line to both the modem and the telephone (Figure C-2). Figure C-2.
Pin Assignments For 2-wire leased-line connections to a JM8 network interface, use an 8-position to 6-position crossover cable (Figure C-3) according to the following FCC requirements: “The RJ series of jacks should not be used for connecting data equipment to nonswitched private line networks — specifically, the service equivalents of the pre-divestiture Series 3002 (Category II, Tariff #260) service.
COMSPHERE 392xPlus Modems To connect a Model 3920Plus port to another modem’s EIA-232-D interface, use a 25-pin crossover cable (Figure C-4). 25-POSITION PLUG PIN NO. 25-POSITION PLUG PIN NO.
ITU-T V.25bis Dialing Command and Responses Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Call Request Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Call Request with Number Provided (CRN) . . . . . . . . . . . . . . . . . . . . . . . Call Request with Stored Memory Address Provided (CRS) . . . . . . . . . . Call Response . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
COMSPHERE 392xPlus Modems Call Request Commands Call Request commands are issued from the DTE to the modem and are responsible for initiating dial calls. Call Request commands include Call Request with Number Provided (CRN) and Call Request with Stored Memory Address Provided (CRS). Call Request with Number Provided (CRN) The CRN command dials the telephone number entered from the DTE. CRN is similar to the ATD command. The CRN command format is: CRNn Where: n is the telephone number to be dialed.
ITU-T V.25bis Dialing Command and Responses NS is similar to the Common Operational Message Invalid Number and the result code ERROR. CB is similar to the Call Failure Messages Dial Line in Use and No Dial-Test and the result code ERROR. RT is similar to the Call Failure Message No Answer Tone and the result code NO CARRIER. AB is similar to the Call Failure Messages No Dial Tone and No Dial-DTR and the result code NO DIALTONE and ERROR.
COMSPHERE 392xPlus Modems Connect Incoming Call (CIC) The CIC command forces the modem to cancel any DIC commands and answer an incoming call. This command is only valid when the DTE issues a DIC command. CIC must be issued within 10 seconds after sending a DIC. CIC is similar to the ATA command. The CIC command format is CIC. If CIC is issued within 10 seconds, the modem sends the VAL response to the DTE. If CIC is issued after 10 seconds, INV is returned.
ITU-T V.25bis Dialing Command and Responses Request List of Stored Numbers (RLN) The Request List of Stored Numbers (RLN) command displays telephone numbers stored in the modem’s directory location. If the RLN command is entered without specifying a directory location, then all directory locations and telephone numbers appear. If a directory location is entered, then only that telephone number appears.
COMSPHERE 392xPlus Modems Command Response A Command Response indicates that the command entered was a valid or invalid entry. Command Response includes Valid (VAL) and Invalid (INV). Valid (VAL) The VAL response indicates that the modem has accepted the V.25bis command issued by the DTE. VAL is similar to the AT result code OK. Invalid (INV) The INV response indicates that the modem has received an incorrect V.25bis command from the DTE. INV is similar to the AT result code ERROR.
ITU-T V.25bis Dialing Command and Responses Table D-1 (2 of 2) V.25bis Commands V.25bis Command AT Command/ S-Register Equivalent Description List Request RLD Request to List Delayed Numbers NONE RLF Request to List Forbidden Numbers NONE RLN Request to List Stored Numbers NONE List Response LSD List Delayed Numbers NONE LSF List Forbidden Numbers NONE LSN List Stored Numbers NONE Table D-2 lists V.25bis response messages supported by the 392xPlus modems. Table D-2 V.
COMSPHERE 392xPlus Modems D-8 October 1998 3920-A2-GH30-40
ASCII Character Table E Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-1 Overview Table E-1 in this appendix provides the ASCII character table.
COMSPHERE 392xPlus Modems Table E-1 (2 of 4) ASCII Characters E-2 Hexadecimal ASCII Value Decimal ASCII Value Control Character Key 17 18 023 ETB CTRL-W 024 CAN CTRL-X 19 025 EM CTRL-Y 1A 026 SUM CTRL-Z 1B 027 ESC CTRL-[ 1C 028 FS CTRL-/ 1D 029 GS CTRL-] 1E 030 RS CTRL-|Ax 1F 031 US 20 032 spacebar 21 033 ! 22 034 “ 23 035 # 24 036 $ 25 037 % 26 038 & 27 039 ’ 28 040 ( 29 041 ) 2A 042 * CTRL-_ 2B 043 + 2C 044 , 2D 045 - 2E
ASCII Character Table Table E-1 (3 of 4) ASCII Characters 3920-A2-GH30-40 Hexadecimal ASCII Value Decimal ASCII Value Control Character 3E 062 > 3F 063 ? 40 064 @ 41 065 A 42 066 B 43 067 C 44 068 D 45 069 E 46 070 F 47 071 G 48 072 H Key 49 073 I 4A 074 J 4B 075 K 4C 076 L 4D 077 M 4E 078 N 4F 079 O 50 080 P 51 081 Q 52 082 R 53 083 S 54 084 T 55 085 U 56 086 V 57 087 W 58 088 X 59 089 Y 5A 090 Z 5B 091 [ 5C 0
COMSPHERE 392xPlus Modems Table E-1 (4 of 4) ASCII Characters E-4 Hexadecimal ASCII Value Decimal ASCII Value Control Character 65 101 e 66 102 f 67 103 g 68 104 h 69 105 i 6A 106 j Key 6B 107 k 6C 108 l 6D 109 m 6E 110 n 6F 111 o 70 112 p 71 113 q 72 114 r 73 115 s 74 116 t 75 117 u 76 118 v 77 119 w 78 120 x 79 121 y 7A 122 z 7B 123 { 7C 124 | 7D 125 } 7E 126 - 7F 127 delete October 1998 3920-A2-GH30-40
Default Configuration Options F Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F-1 Overview Table F-1 lists the six sets of default (preset) configuration options, labeled Sync Leased, Async Leased, TMp (Trellis Multipoint), Async Dial, Sync Dial, and UNIX Dial. These six sets contain the most commonly used configuration options for modems installed into these hardware environments.
COMSPHERE 392xPlus Modems Table F-1 (1 of 10) Factory Default Configuration Options Configuration Option Sync Leased Default Settings Async Leased Default Settings TMp Default Settings Async Dial Default Settings UNIX Dial Default Settings Sync Dial Default Settings DTE Interface (Multiport mode) MUX Sub-group ÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁ
Default Configuration Options Table F-1 (2 of 10) Factory Default Configuration Options Configuration Option Sync Leased Default Settings Async Leased Default Settings TMp Default Settings Async Dial Default Settings UNIX Dial Default Settings Sync Dial Default Settings Port Rate Sub-group (Cont’d) ÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ
COMSPHERE 392xPlus Modems Table F-1 (3 of 10) Factory Default Configuration Options Sync Leased Default Settings Configuration Option Async Leased Default Settings TMp Default Settings Async Dial Default Settings UNIX Dial Default Settings Sync Dial Default Settings Port EIA Sub-group (Cont’d) ÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁ
Default Configuration Options Table F-1 (4 of 10) Factory Default Configuration Options Sync Leased Default Settings Configuration Option Async Leased Default Settings TMp Default Settings Async Dial Default Settings UNIX Dial Default Settings Sync Dial Default Settings DTE Interface (Singleport mode Cont’d) ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁ
COMSPHERE 392xPlus Modems Table F-1 (5 of 10) Factory Default Configuration Options Sync Leased Default Settings Configuration Option Async Leased Default Settings TMp Default Settings Async Dial Default Settings UNIX Dial Default Settings Sync Dial Default Settings ÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁ
Default Configuration Options Table F-1 (6 of 10) Factory Default Configuration Options Sync Leased Default Settings Configuration Option Async Leased Default Settings TMp Default Settings Async Dial Default Settings UNIX Dial Default Settings Sync Dial Default Settings ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
COMSPHERE 392xPlus Modems Table F-1 (7 of 10) Factory Default Configuration Options Sync Leased Default Settings Configuration Option Async Leased Default Settings TMp Default Settings Async Dial Default Settings UNIX Dial Default Settings Sync Dial Default Settings Lease Line (Cont’d) ÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁ
Default Configuration Options Table F-1 (8 of 10) Factory Default Configuration Options Configuration Option Sync Leased Default Settings Async Leased Default Settings TMp Default Settings Async Dial Default Settings UNIX Dial Default Settings Sync Dial Default Settings ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁ Á
COMSPHERE 392xPlus Modems Table F-1 (9 of 10) Factory Default Configuration Options Configuration Option Sync Leased Default Settings Async Leased Default Settings TMp Default Settings Async Dial Default Settings UNIX Dial Default Settings Sync Dial Default Settings V.
Default Configuration Options Table F-1 (10 of 10) Factory Default Configuration Options Sync Leased Default Settings Configuration Option Async Leased Default Settings TMp Default Settings Async Dial Default Settings UNIX Dial Default Settings Sync Dial Default Settings ÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁÁÁ
COMSPHERE 392xPlus Modems F-12 October 1998 3920-A2-GH30-40
Sample Configurations Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Point-to-Point . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Configuration Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Extended Point-to-Point . . . . . . . . . . . . . .
COMSPHERE 392xPlus Modems Point-to-Point Figure G-1 shows a sample configuration for point-to-point applications. 28800(V34) 9600 DTE (Sync) 28800(V34) TX 9600 1 2 3 4 4800 TX Leased 3920Plus A 3920Plus B 1 2 3 4 4800 Cable 2 9600 DTE (Sync) 9600 DTE (Sync) 4800 DTE (Sync) 4800 DTE (Sync) Cable 2 Cable 1 Cable 1 Cable 1 Cable 1 Cable 1 Cable 1 Cable 1 Cable 1 Figure G-1.
Sample Configurations Sample Port Rate Table ÁÁÁ ÁÁÁÁ ÁÁÁ ÁÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁÁ ÁÁÁ ÁÁÁÁ ÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁ ÁÁÁÁ ÁÁÁ ÁÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁÁ ÁÁÁ ÁÁÁÁ ÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁ ÁÁÁÁ ÁÁÁ ÁÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁÁ ÁÁÁ ÁÁÁÁ ÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ Port Rate Port 1 Port 2 Port 3 Port 4 28.8K 9600 9600 4800 4800 24.0K 9600 Disable 4800 4800 19.2K 9600 Disable 4800 4800 16.8K 9600 Disable Disable 4800 14.
COMSPHERE 392xPlus Modems Extended Point-to-Point Figure G-2 shows a sample configuration for extended point-to-point applications.
Sample Configurations 3910 A Use Sync Leased (Answer) default configuration options with the following exceptions: Tx Clock Source Set to External. LeasedLine Rate Set to 4800(V32b). Autorate (Leased Line) Set to Disable. 3910 B Use Sync Leased (Originate) default configuration options with the following exceptions: Tx Clock Source Set to RXC_Loop. LeasedLine Rate Set to 4800(V32b). Autorate (Leased Line) Set to Disable.
COMSPHERE 392xPlus Modems Extended Multipoint Figure G-3 shows a sample configuration for extended multipoint applications.
Sample Configurations Configuration Options 3920Plus A Use Sync Leased (Answer) default configuration options with the following exception: Rate Refer to Sample Port Rate Table in this section. 3920Plus B Use Sync Leased (Originate) default configuration options with the following exceptions: Tx Clock Source Set to RXC_Loop. Rate Refer to Sample Port Rate Table in this section. Port TXC Source Set Port 4 to External.
COMSPHERE 392xPlus Modems Cables Cable 1 Use a standard, customer-supplied, EIA-232-D/V.24 cable with a DB-25-P (plug) connector at one end to attach to the modem. Attach this to the connector labeled DTE1, 2, 3, or 4. Cable 2 Use part number 125-0053-1431 (an 8-position, 8-wire modular cord that is supplied with the modem). Attach this to the connector labeled LEASED. Cable 3 Use part number 818-2759-0111 or an equivalent customer-supplied, EIA-232-D/V.
Sample Configurations Configuration Options 3920Plus A Use Sync Leased (Answer) default configuration options with the following exceptions: Auto Dial Back Set to Enable. Rate Refer to Sample Port Rate Table in this section. 3920Plus B Use Sync Leased (Originate) default configuration options with the following exceptions: Auto Dial Back Set to Enable. Rate Refer to Sample Port Rate Table in this section.
COMSPHERE 392xPlus Modems Point-to-Point with Network Management Figure G-5 shows a sample configuration for point-to-point applications with network management.
Sample Configurations Sample Port Rate Table ÁÁÁ ÁÁÁÁ ÁÁÁ ÁÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁÁ ÁÁÁ ÁÁÁÁ ÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁ ÁÁÁÁ ÁÁÁ ÁÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁÁ ÁÁÁ ÁÁÁÁ ÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁ ÁÁÁÁ ÁÁÁ ÁÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁÁ ÁÁÁ ÁÁÁÁ ÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ Port Rate Port 1 Port 2 Port 3 Port 4 28.8K 9600 9600 4800 4800 24.0K 9600 Disable 4800 4800 19.2K 9600 Disable 4800 4800 16.8K 9600 Disable Disable 4800 14.
COMSPHERE 392xPlus Modems Carrier with Network Management Figure G-6 shows a sample configuration for COMSPHERE 3000 Series Carrier applications with network management.
Sample Configurations Configuration Options 3921Plus A Use Sync Leased (Answer) default configuration options with the following exceptions: Rate Refer to the Sample Port Rate Table in this section. Diag Connection Set to NMS(CC). NetMngmtAddress Set to 1. 3920Plus B Use Sync Leased (Originate) default configuration options with the following exception: Rate Refer to the Sample Port Rate Table in this section.
COMSPHERE 392xPlus Modems Extended Diagnostics Figure G-7 shows a sample configuration for extended diagnostics. Figure G-7. Sample Configuration Extended Diagnostics Configuration Options G-14 3920Plus A Use Sync Leased (Answer) default configuration options with the following exceptions: NetworkPosition Set to Control. Diag Connection Set to NMS(CC). NetMngmtAddress Set to 1.
Sample Configurations 3920Plus C Use Sync Leased (Answer) default configuration options with the following exceptions: Tx Clock Source Set to External. Extended Channel Set Port 1 to Enable. Upstream Port # Set to Port 1. Diag Connection Set to Modem(DC). NetworkPosition Set to Control. 3920Plus D, F 3910 H Use Sync Leased (Originate) default configuration options with the following exception: Tx Clock Source Set to RXC_Loop.
COMSPHERE 392xPlus Modems Digital Bridging Figure G-8 shows a sample for Digital Bridging.
Sample Configurations 3920Plus E, G Use TMp Tributary template default configuration options with the following exceptions: Port2 MSD Set to Enable. RTS Action Set to Sim_Cntl_Car. Auto Dial Back Set to Enable. Auto Dial Standby Set to Adv 15min. Dial Line Rate Set to 14400(V32). 3920Plus F Use TMp Tributary template default configuration options with the following exceptions:. RTS Action Set to Sim_Cntl_Car. Auto Dial Back Set to Enable. Auto Dial Standby Set to Adv 15min.
COMSPHERE 392xPlus Modems Point-to-Point MSD Figure G-9 shows a sample configuration for point-to-point MSD. Cable 1 Cable 1 Logical Channel FEP 1 19200 2 3920Plus A 9600 3 DTE 4 (Sync) Cable 1 Cable 2 Ports 1-3 MSD Leased 3920Plus B Port 4 TDM Cable 2 1 2 3 4 DTE (Sync) Addr = 1 DTE (Sync) Addr = 2 DTE (Sync) Addr = 3 DTE (Sync) Addr = 4 495-14613a-01 Figure G-9.
Sample Configurations Sample Port Rate Table: Point-to-Point MSD 3920Plus A ÁÁÁ ÁÁÁÁ ÁÁÁ ÁÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁÁ ÁÁÁ ÁÁÁÁ ÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁ ÁÁÁÁ ÁÁÁ ÁÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁÁ ÁÁÁ ÁÁÁÁ ÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁ ÁÁÁÁ ÁÁÁ ÁÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁÁ ÁÁÁ ÁÁÁÁ ÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ Port Rate Port 1 Port 2 Port 3 Port 4 28.8K 19200 Disable Disable 9600 24.0K 14400 Disable Disable 9600 19.
COMSPHERE 392xPlus Modems Multipoint MSD Figure G-10 shows a sample configuration for multipoint MSD.
Sample Configurations Cables 3920-A2-GH30-40 Cable 1 Use a standard, customer-supplied, EIA-232-D/V.24 cable with a DB-25-P (plug) connector at one end to attach to the modem. Attach this to the connector labeled DTE1, 2, 3, or 4. Cable 2 Use part number 125-0053-1431 (an 8-position, 8-wire modular cord that is supplied with the modem). Attach this to the connector labeled LEASED.
COMSPHERE 392xPlus Modems G-22 October 1998 3920-A2-GH30-40
Synchronous Data Compression Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Synchronous Data Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SDC Algorithm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . DTE and DCE Frames . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SDC User Interface . . . . . . . . . . . . . . . . . .
COMSPHERE 392xPlus Modems DCE SYNCHRONOUS DTE DATA COMPRESSION FUNCTION INTERCHANGE CIRCUITS FUNCTION ERROR CORRECTION FUNCTION SIGNAL CONVERTER LINE CONTROL FUNCTION 495-14785 Figure H-2. Synchronous Data Compression Synchronous Data Format The SDC feature supports the HDLC and SDLC type protocols for synchronous DTE data. An HDLC frame is composed of an information field containing the data to transmit, plus an overhead (address, control, and FCS fields) used by the DTE protocol.
Synchronous Data Compression DTE and DCE Frames Data exchanged between the local and remote DCEs is according to the LAPM protocol. The structure of a LAPM frame (DCE frame) is identical to the HDLC frame. The data from the DTE is compressed into the information field of the DCE frame. After compression, one DTE frame is segmented into one or several DCE frames. SDC User Interface When SDC is enabled, the following configuration options are available to set up the SDC feature. V.
COMSPHERE 392xPlus Modems Data Synchronization Data exchanged between the synchronous DTE and the modem is synchronized by two clock signals. Data coming from the DTE is synchronized by the transmit clock and data received by the DTE is synchronized by the receive clock. The transmit clock is provided by the modem on circuit 114 or by the synchronous DTE on circuit 113. The receive clock is provided by the modem on circuit 115.
Synchronous Data Compression Flow Control Method The data transmitted from the DTE is sent to the DCE at a rate determined by the transmit clock frequency. When SDC is active, this data is then compressed in the DCE and sent to the remote DCE at the line rate less than the the rate between the DTE and DCE (usually twice, three, or four times less).
COMSPHERE 392xPlus Modems Tuning SDC Efficiency SDC efficiency is dependent on the configuration parameters of the DTE and the modem. DTE Configuration The way DTE parameters are changed, and whether they can be changed, depends on your DTE. See the documentation that came with your DTE. DTE rate configuration parameter. The nominal DTE rate (the Tx/Rx clock’s frequency at the DTE/DCE interface) can be a bottleneck.
Synchronous Data Compression SDC Negotiation The use of the synchronous data compression function and the value of the associated parameters is negotiated at link establishment via a protocol.
COMSPHERE 392xPlus Modems H-8 October 1998 3920-A2-GH30-40
Equipment List Feature/ Part Number Equipment 3920-A2-GH30-40 I Model 3920Plus 3920-A1-XXX 3920-A2-XXX Model 3921Plus 3921-B1-XXX 6-position, 4-wire modular cord, 7-foot length 125-0067-0031 8-position, 8-wire modular cord, 14-foot length 125-0053-1431 Universal Power Supply (3920-A1-xxx) 327-0074-XXXX Unregulated 100-vac Power Supply (3920-A2-xxx) 327-0086-0131 Unregulated 110-vac Power Supply (3920-A2-xxx) 327-0073-0131 Unregulated 230-vac Power Supply (3920-A2-xxx) 327-0096-0131 3600
COMSPHERE 392xPlus Modems I-2 October 1998 3920-A2-GH30-40
Glossary Active (Operating) A configuration area containing configuration options currently in use by the modem. Any time a power cycle occurs or a reset is performed or a save is issued using the DCP, this area is updated with the contents of Active (Saved). Active (Saved) A nonvolatile configuration area containing the most recently saved configuration options. ADp Advanced Diagnostic protocol.
COMSPHERE 392xPlus Modems automatic dial backup When leased-line operation fails, this function forces the modem to dial the telephone number stored in directory location 1. automatic dial standby When operating in Dial Backup mode, this function forces the modem to periodically check the quality of the leased line. If the leased line is found to be at normal operating condition, the modem disconnects from the dial network and continues normal operation over the leased-line network.
Glossary character echo A way to check the accuracy of data transmission by sending to the monitor (displaying) all the characters being transmitted. circuit pack lock A screw lock tab installed over a circuit card’s latch release tab to prevent the unit from being removed without a tool. It is used on SDUs, modems, and filler panels. Command mode The modem accepts AT commands instead of transmitting or receiving data on the DTE. See Data mode.
COMSPHERE 392xPlus Modems Data mode A state where any entries made from the DTE are considered data and are transmitted and received between modems. Modems remain in Data mode until the connection is broken or until they are forced into online Command mode using the escape sequence. DB-25 connector A 25-pin connector that is used to connect a cable which enables communication between two devices. dBm A decibel referenced to one milliwatt. This unit measures relative signal power.
Glossary directory location Nonvolatile memory that stores up to ten telephone numbers. Each directory location can have up to 40 characters entered. DOC Canadian Department of Communication. download A process that transfers modem firmware from a locally attached PC to a modem or allows the cloning of firmware from a local modem to a remote modem. downstream modem A device connected “farther” from the host computer.
COMSPHERE 392xPlus Modems function key Any one of three keys on the DCP that allows you to select or increment an LCD entry. Function keys are labeled F1, F2, and F3. half-duplex Two-way data communications allowed in only one direction at a time. handshaking The exchange of predetermined codes and signals (tones) to establish a connection between two modems. HDLC High-Level Data Link Control. A communication protocol defined by the International Standards Organization (ISO).
Glossary MNP This protocol (Microcom Networking Protocol) detects and corrects data errors caused by telephone line noise and signal distortion. MNP5 includes data compression. modem (Modulator/DEModulator). A device that transforms signals from digital to analog form and vice versa. modulation The process of varying some characteristics (usually amplitude, frequency, and/or phase) of a carrier wave to form data transmissions. MSD Modem Sharing Device.
COMSPHERE 392xPlus Modems phase jitter A rapid or repeated shifting of the relative phase of a signal resulting in unwanted distortion. physical address The diagnostic address of a control modem derived from its location in the carrier: its carrier and slot number. point-to-point line A line or circuit connecting two stations. poll list A list containing the network management addresses of downstream modems.
Glossary SDU Shared Diagnostic Unit. A circuit card that plugs into a dedicated slot in the COMSPHERE 3000 Series Carrier to provide the SDCP and network management interfaces to the modems in the carrier. It translates the network management protocol to the devices in the carrier and routes incoming messages to the appropriate slots. secondary channel A data transmission channel with a lower signaling rate than the primary channel. It is mostly used for modem diagnostics.
COMSPHERE 392xPlus Modems V.22 A ITU–T standard for modems operating full-duplex over dial networks at 1200 bps. V.22bis A ITU–T standard for modems operating full-duplex over leased lines or dial networks at 2400 bps. V.27bis A ITU–T standard for modems operating over leased lines at 2400 or 4800 bps. V.29 A ITU–T standard for modems operating over leased lines at 4800, 7200, or 9600 bps. V.
Index AT commands allowing use, 5-45 command list, 14-5–14-15 command mode, 14-1 data mode, 14-1 escape character, 5-46 response to invalid, 5-48 S-Register, 14-29 result codes, 14-3–14-5 using commands, 14-1–14-2 AT escape character, 5-46 S-Register, 14-17 Auto-Answer Ring Count Multiport mode, 5-19 S-Register, 14-17 Singleport mode, 5-49 Automatic Dial Backup Multiport mode, 5-27 S-Register, 14-24 Singleport mode, 5-60 Automatic Dial Standby Multiport mode, 5-28 S-Register, 14-24 Singleport mode, 5-61 aut
COMSPHERE 392xPlus Modems Bell 103J, 5-53 212A, 5-53 Bisync, 5-45, D-1 Blind Dial Pause Multiport mode, 5-20 S-Register, 14-17 Singleport mode, 5-50 Break Buffer Control, 5-67 AT command, 14-13 Break Forces Escape, 5-46 AT command, 14-13 Buffer Disconnect Delay, 5-70 S-Register, 14-24 buffer size, Reduced Asynchronous, 5-71 busy forced, 5-52 via DTR, 5-52 busy control, 7-6–7-7 Busy Tone Detect AT command, 14-8 Multiport mode, 5-20 Singleport mode, 5-50 compatibility, 1-14 COMSPHERE 3000 Series Carrier Mod
Index dial access security. See Security answering a call auto-answer, 5-19, 5-49, 11-2 manual answer, 5-19, 5-49, 10-5, 11-3 AT command, 14-6 backup, 2-7, 7-7–7-8, 10-1, 10-5–10-7, B-2 command modifiers, 10-9, 14-6 DCP controlled, 10-1–10-10 manual dial.
COMSPHERE 392xPlus Modems F K faceplate, 1-4, 1-5, 3-2 factory default configurations, 2-13, 5-2, F-2–F-7 loading, 14-9 Fast Disconnect Multiport mode, 5-20 S-Register, 14-29 Singleport mode, 5-51 features, 1-7 firmware, Mixed Tributary Multiport mode, 5-34 S-Register, 14-21 Singleport mode, 5-77 firmware part number (FPt #), 4-8 firmware revision level (FRev), 4-8 firmware upgrades/download, 7-8–7-15 automatic, 7-16 download center phone number, 7-16 flow control AT command, 14-14, 14-15 modem-to-modem,
Index loopback local analog, 8-4–8-5 local digital, 8-7–8-8 remote digital, 8-5–8-6 loudness of speaker, 5-31, 5-73, 7-2, 14-7 LSD Control AT command, 14-9 Multiport mode, 5-16 Singleport mode, 5-42 LSD Hold Multiport mode, 5-27 S-Register, 14-20 Singleport mode, 5-59 Multiport mode, 1-6, 1-10, 5-8 configuration options Dial Line, 5-22–5-24 DTE Interface, 5-10–5-18 leased line, 5-25–5-29 Line Dialer, 5-19–5-21 Misc, 5-31–5-36 Test, 5-30 multiport modem, 1-3, 1-6 model 3921Plus, 1-5 operational mode, 1-6 M
COMSPHERE 392xPlus Modems Remote access password, 5-4–5-9, 5-31, 5-74, 13-2, 13-3, 13-4 S-Registers, 14-25 branch, 3-9, 13-1–13-4 remote digital loopback test, 8-5–8-6 Repeat Last Command, 14-6 requirements ac power, 1-13 government, 1-10–1-12 Reset and Load Active, AT command, 14-8 reset control, 7-3 result codes enable/disable, 5-47, 14-7 extended, 5-47, 14-8 list, 14-1, 14-3–14-5 numeric or verbal, 5-48, 14-7 retrain 2W Leased Line Signal Quality, 5-27, 5-60 automatic Multiport Mode, 5-24, 5-56 S-Regist
Index Security access messages, 3-13–3-14 branch, 3-9, 12-5–12-14 configuration options, 12-14–12-16 database tables, 12-3, 12-4, 12-18–12-21 passwords, 12-3–12-4, 12-16–12-17 singleport mode, 12-1 Special Multiport mode, 5-32 Singleport mode, 5-75 Security configuration options group, 5-78 Select key, 2-11, 3-7, 3-8 self-test, 2-13, 8-3 Send Break Control, 5-68 AT command, 14-13 serial number (Ser #), 4-8 service line, 7-7–7-8 Service Log, Status branch, 4-17–4-18 shared diagnostic control panel (SDCP), 1
COMSPHERE 392xPlus Modems Tone Dial, 14-7 top-level menu messages, 3-10 Train Time Multiport mode, 5-23 Singleport mode, 5-55 Trellis Multipoint (TMp), 7-11 Troubleshooting, B-1–B-6 Tx Clock Source AT command, 14-12 Multiport mode, 5-10 Singleport mode, 5-42 V.42 error control, 5-64 V.42/MNP/Buffer configuration options group, 5-64 V.42bis data compression, 5-65 AT command, 14-14 V.42t Paradyne proprietary SDC, 1-14 V.54 Address Multiport mode, 5-30 S-Register, 14-25 Singleport mode, 5-72 V.
