COMSPHERE 3900 SERIES MODEMS MODELS 3910 AND 3911 POINT-TO-POINT/MULTIPOINT INSTALLATION AND OPERATION MANUAL Document No. 3910-A2-GN32-41 February 2002 Rurstraße 4 D-41564 Kaarst 1 Telefon (02131) 6 69 08-0 Telefax (02131) 66 71 48 Internet: www.digicomm.de e-mail: info@digicomm.
COMSPHERE 3900 Series Modems COMSPHERE 3900 Series Modems Models 3910 and 3911 Point-to-Point/Multipoint Installation and Operation Manual 3910-A2-GN32-41 6th Edition (February 2002) Changes and enhancements to the product and to the information herein will be documented and issued as a new release to this manual. For the 3900 Series 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. This product is intended to be used 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 adaptor.
COMSPHERE 3900 Series 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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ix ix x x 1. Introduction Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
COMSPHERE 3900 Series Modems 3. DCP Operation Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Diagnostic Control Panels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Status Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Diagnostic Control Panel Operation . . . . . . . . . . . . . . . . . . . . . . . . . Menu Structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Table of Contents 10. Call Setup Branch Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Dial . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Disconnect . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Answer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Dial Standby/Return to Dial . . . . . . . . . . . . . . . .
COMSPHERE 3900 Series Modems Appendices A. B. C. D. E. F. G. H. Menu Tree . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Pin Assignments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . CCITT V.25bis Dialing Commands and Response . . . . . . . . . . ASCII Character Table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Table of Contents List of Figures 3910-A2-GN32-40 Figure Page 1-1 1-2 2-1 2-2 2-3 3-1 3-2 3-3 5-1 5-2 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 1-3 1-4 2-3 2-10 2-11 3-2 3-3 3-5 5-2 5-3 8-4 8-5 8-6 8-7 8-8 8-8 10-5 C-3 C-4 C-5 C-6 G-2 G-3 G-4 G-5 G-6 G-7 G-9 Model 3910 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Model 3911 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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Table of Contents List of Tables Table 1-1 3-1 3-2 3-3 3-4 3-5 4-1 4-2 5-1 5-2 5-3 5-4 5-5 5-6 5-7 5-8 7-1 10-1 12-1 12-2 12-3 12-4 12-5 12-6 12-7 14-1 14-2 14-3 B-1 B-2 B-3 B-4 B-5 B-6 C-1 C-2 3910-A2-GN32-40 Page Technical Specifications for 391x Series Modems . . . . . . . . . . . . . . . . . . . . . . . . . Model 3910 and Model 3911 DCP LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SDCP LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
COMSPHERE 3900 Series Modems Table D-1 D-2 E-1 F-1 viii Page V.25bis Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . V.25bis Response Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ASCII Characters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Factory Default Configuration Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Preface Objectives and Reader Assumptions This manual describes how to install and operate the COMSPHEREr 391x Series standalone and carrier-mounted modems. This manual assumes that you have a basic understanding of modems and their operation. How to Use this Manual Chapter 1 provides technical specifications, information about the 391x Series modems’ features, and the government requirements for using these modems. Chapter 2 provides instructions for installing the 391x Series modems.
COMSPHERE 3900 Series 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 391x Series modems. Appendix H provides an equipment list for the 391x Series modems.
Introduction 1 Overview The COMSPHERE 391x Series modems, a new generation of full-feature, high-speed modems, offer reliable asynchronous and synchronous operation over leased-line or dial networks. The 391x Series modems’ unique software defineability allows for the addition of future enhancements, whether it is installing new features or firmware upgrades. The modem’s compatibility with a number of dialing methods and protocols, such as asynchronous AT commands, ITU-T V.
COMSPHERE 3900 Series Modems Multipoint Applications In multipoint applications, leased-line circuits are used 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 Standalone Model 3910 4-Wire/2-Wire Modem The standalone Model 3910 modem (Figure 1-1) is capable of either 4-wire/2-wire leased-line or dial operation. The modem is controlled using either AT commands or the diagnostic control panel (DCP). The DCP consists of a liquid crystal display (LCD), three function keys, four directional keys, and a row of 13 LED status indicators. For a better understanding of DCP operation, refer to Chapter 3, DCP Operation.
COMSPHERE 3900 Series Modems Carrier-Mounted Model 3911 4-Wire/2-Wire Modem The carrier-mounted Model 3911 modem (Figure 1-2) is capable of either 4-wire/2-wire leased-line or dial operation and installs into a COMSPHERE 3000 Series Carrier. The Model 3911’s faceplate has 16 LED status indicators for displaying modem activity and an audio speaker jack for the carrier’s optional speaker.
Introduction The Model 3911 derives ac power from the COMSPHERE 3000 Series Carrier’s backplane, which is a common bus to all devices installed in the carrier. The user interface to any Model 3911 is through the shared diagnostic control panel (SDCP), an optional feature which operates in a manner similar to the DCP on the Model 3910. For a better understanding of DCP operation, refer to Chapter 3, DCP Operation. The COMSPHERE 3000 Series Carrier has a total of 17 slots.
COMSPHERE 3900 Series Modems 7. If you experience trouble with this equipment, please contact your sales or service representative (as appropriate) for repair or warranty information. If the product needs to be returned to the company service center for repair, contact them directly for return instructions using one of the following methods: • Via the Internet: Visit the Paradyne World Wide Web site at http://www.paradyne.
Introduction Canada NOTICE TO THE 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.
COMSPHERE 3900 Series Modems Technical Specifications Table 1-1 shows the technical specifications for the 391x Series modems. Table 1-1 (1 of 3) Technical Specifications for 391x Series Modems Description Specifications APPROVALS FCC Part 15 Class A FCC Part 68 Registration Number: (See label on modem) UL Model 3910 Listed to UL 1950 COMSPHERE 3000 Series Carrier Recognized to UL 1950 CSA Model 3910 Certified to CSA C22.2 No.
Introduction Table 1-1 (2 of 3) Technical Specifications for 391x Series Modems Specifications Description ENVIRONMENT Operating Temperature 32°F (0°C) to 122°F (50°C) Relative Humidity 5% to 90% (noncondensing) Shock and Vibration Withstands normal shipping Storage Temperature – 4°F (–20°C) to 158°F (70°C) DTE INTERFACE 25-pin D-subminiature connector EIA-232-D/ITU-T V.
COMSPHERE 3900 Series Modems Table 1-1 (3 of 3) Technical Specifications for 391x Series Modems Specifications Description DATA RATES Leased Line 19200, 16800, 14400, 12000, 9600, 7200, 4800, 2400 1200 bps Dial Line 19200, 16800, 14400, 12000, 9600, 7200, 4800, 2400, 1200, 600, 300 bps ERROR CONTROL ITU-T V.42 MNP 4-2 DATA COMPRESSION ITU-T V.
Modem Installation 2 Overview This chapter provides a list of equipment supplied with the modem as well as a list of customer supplied equipment. In addition, it describes how to install and remove the 391x Series modem, and how to select a factory preset configuration using either the DCP or the AT command set.
COMSPHERE 3900 Series Modems Customer-Supplied Equipment The following customer-supplied equipment is required to complete a data communications system using the Model 3910 modem: • A DTE with an available EIA-232-D serial port. • A standard EIA-232-D cable with a DB-25-P (plug) connector at one end to attach to the modem. • One of the following modular leased or dial network interfaces: — JM8 for leased-line applications. — RJ11C for dial permissive applications.
Modem Installation Connecting Cables to the Model 3910 Modems Figure 2-1 shows how Model 3910 modems are connected to certain TELCO jack types using the appropriate cables. For pin assignments, refer to Appendix C, Pin Assignments.
COMSPHERE 3900 Series Modems DTE Connection Use the following procedures to connect the EIA-232-D cable from the modem to the DTE: 1. Make sure the modem’s rear panel power switch is OFF. 2. Connect the DB-25-P (plug) connector on the cable to the DB-25-S (socket) connector labeled DTE (Figure 2-1) on the modem’s rear panel. Use a small screwdriver to secure the cable to the modem. 3. Connect the DB-25-P connector on the cable to the DB-25-S connector on the DTE.
Modem Installation Network Management System Connection For the Model 3910, use the following procedures to connect the modem to the network management system interface: 1. Insert the sub-miniature, 4-conductor modular plug of the 3600 Hubbing Device into the jack labeled NMS (Figure 2-1). Refer to Document Number, 3610-A2-GZ45, 3600 Hubbing Device Feature Number 3600-F3-300, Installation Instructions, for a description of the 3600 Hubbing Device. Installation for the 3910 is the same as for the 3610 DSU.
COMSPHERE 3900 Series Modems Selecting Factory Configuration Options After the modem passes the power-up self-test, configure it for operation using one of the six factory preset configurations.
Modem Installation 6. Press the key until the appropriate configuration area appears on the LCD, then press the corresponding function key to select your choice. (Saving configuration options to the Active (Saved) configuration area automatically saves them to the Active (Operating) configuration area.) The LCD displays Command Complete. 7. The modem is now configured with the selected factory template. Press the return to the Top-Level menu.
COMSPHERE 3900 Series Modems To change a factory template using AT commands, perform the following steps. For more information on changing factory templates using AT commands, refer to Chapter 14, AT Command Set and S-Registers. 1. Use the AT&F&W command to load the appropriate factory configuration to the appropriate storage area.
Modem Installation Removing and Replacing Model 3910 Modems To remove and replace a Model 3910 modem, perform the following steps: 1. Make sure the modem is offline, and press the modem’s rear panel power switch to the OFF position. 2. Disconnect the power cord from the ac power outlet, and then disconnect the dc power cable from the connector on the rear of the modem. 3. Disconnect the leased-line and dial modular cords from the modem’s rear panel. 4.
COMSPHERE 3900 Series Modems Figure 2-2. Installing a Model 3911 Modem 2. At the front of the carrier, hold the modem vertically, with the latch on its faceplate in the open position, and insert it into the top and bottom card guides of one of the slots numbered 1–16 (Figure 2-2). Slide the modem into the slot, aligning the modem with the rear connector plate, until the backplane connector and DTE connector seat firmly into the back of the carrier.
Modem Installation 5. Press the modem. Select key to place the SDCP in direct communication with the selected The LCD displays the Top-Level menu for the selected modem. In addition, the Front Panel LED on the modem’s faceplate and the OK LED on the SDCP light. 6. Once you have determined that the modem is installed properly and completed its power-up self-test, rotate the circuit pack lock until it covers the faceplate latch (Figure 2-3) and tighten the retention screw on the circuit pack lock.
COMSPHERE 3900 Series Modems Removing and Replacing Model 3911 Modems CAUTION If the Model 3911 is removed from the carrier, always use a ground strap when handling the modem. Always store the Model 3911 in an antistatic bag when it is removed from the carrier. It is not necessary to power down the carrier to remove and replace a Model 3911 modem. Perform the following steps: 1. Rotate the circuit pack lock until the release tab is exposed. 2.
DCP Operation 3 Overview This chapter describes how to use the diagnostic control panel (DCP) of the 391x Series modem. It also describes how to select and use each branch of the Top-Level menu tree. Diagnostic Control Panels There are two types of diagnostic control panels (DCP), the DCP on the standalone Model 3910 modems and the shared diagnostic control panel (SDCP), an optional feature, used with the Model 3911 installed into a COMSPHERE 3000 Series Carrier.
COMSPHERE 3900 Series Modems Model 3910 Diagnostic Control Panel The diagnostic control panel (DCP) of the Model 3910 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 3910 142 496-14174-01 Figure 3-1.
DCP Operation Status Indicators The 391x Series modems’ status indicators continuously provide information on the modem’s operating condition. All of the status indicators on the Model 3910 appear on the DCP (Figure 3-1), whereas the status indicators for the carrier-mounted Model 3911 are located on the Model 3911’s faceplate, the SDCP, and the SDU faceplate (Figure 3-2).
COMSPHERE 3900 Series Modems The standalone Model 3910 modem’s DCP has 13 light-emitting diodes (LEDs), and the carrier-mounted Model 3911 has 16 LEDs. These LEDs are listed and described in Table 3-1. LEDs specific to one model type have the appropriate model number shown in the table. Table 3-1 Model 3910 and Model 3911 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 391x Series modem. ON.
DCP Operation The SDCP LEDs are listed and described in Table 3-2. Table 3-2 SDCP LEDs Label Color Indicates OK green Power is ON and the modem is capable of operating. Alarm red The modem has detected a problem with its operation. For example, the modem failed a self-test. BckUp yellow The modem, originally configured for leased-line operation, is now operating on dial networks in a Dial Backup mode. Test yellow The modem is involved in a test. Normal operation is not possible.
COMSPHERE 3900 Series Modems LCD Display The LCD consists of a top line and bottom line, with each displaying a maximum of 16 characters at a time. If more information is available on the LCD than what is currently displayed, an indicator appears in the top right or bottom right-hand corner of the LCD. Use the or key to scroll in the indicated direction to display more selections onto the LCD.
DCP Operation Keypad The DCP on the Model 3910 has seven keys while the optional SDCP of the COMSPHERE 3000 Series Carrier has eight keys. The additional key on the carrier is the Select key, used to connect the SDCP to a specific slot in the carrier. Key The key returns you to the Top-Level menu display from anywhere in the menu tree. Pressing while changing configuration options displays the message Save Straps? Yes No.
COMSPHERE 3900 Series Modems Menu Structure The menu tree is a hierarchical structure used to display functions that configure and control local and remote 391x Series modems. It is accessed via the DCP and is shown in Appendix A, Menu Tree. “Status” Status PList Configure Test Control Displays the current status of the modem along with the data rate and the error control mode.
DCP Operation Table 3-3 (1 of 3) Top-Level Menu Status Status Normal Operation p Alarm*** Call Setup Dial Backup p or L Leased dB Backup k Message Indicates Leased:MR* The modem is operating on leased lines and transmitting at the displayed data rate. Idle:MR* The modem is configured for dial network operation and is on-hook. OnLine:MR* EC** The modem is online, in Data mode, and operating at the displayed data rate. EC (error control) appears if error control is operational.
COMSPHERE 3900 Series Modems 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 cannot 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 cannot be called again.
DCP Operation Table 3-3 (3 of 3) Top-Level Menu Status Status Message Call Disconnect 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. DTR Disconnect The modem has disconnected due to the loss of DTR from the DTE.
COMSPHERE 3900 Series Modems 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.
DCP Operation The Top-Level menu’s main branches appear on the LCD in the order of Status, Configure, PList, Control, Test, SubHS, Call Setup, Talk/Data, Security, and Remote. These branches are described in detail in Chapters 4 through 13. Quick Configuration Display The Quick Configuration display indicates the basic operational characteristics of the modem. Leased:19.2 Status Configure F1 F3 F2 To access the Quick Configuration display from the Top-Level display, press the key. Leased:19.
COMSPHERE 3900 Series Modems The modem’s Quick Configuration information appears on the LCD’s bottom line. 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 modem is in Asynchronous mode, and S indicates the modem is in Synchronous mode.
Status Branch 4 Overview The Status branch of the Top-Level menu allows you to view the current status of the leased-line or dial connection, the identity (for example, serial number and model number) of your equipment, and the DTE interface.
COMSPHERE 3900 Series Modems To access Status from the Top-Level menu, select Status. Leased:19.2 Status Configure F1 F2 F3 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.
Status Branch Table 4-1 (1 of 2) Health and Status Messages Type Major Minor Status 3910-A2-GN32-40 Message Indicates Device Failure A device/self test has failed. The probable cause is a modem hardware problem or diagnostic memory failure. Facility Fault A severe data transport problem is occurring due to poor line conditions. No signal or a very poor signal is being received. Streaming DTE The modem is in an Antistreaming condition.
COMSPHERE 3900 Series Modems Table 4-1 (2 of 2) Health and Status Messages Type Dial Thresh* Security y Port 1 Message Indicates Make Busy Mode The modem is in a Make Busy condition. Service Line (Model 3911 only) The modem installed in a COMSPHERE 3000 Series Carrier has been switched to a service line. Short Hold Time The modem’s dial hold time has been shortened. Non-Answering The modem is in a non-answering mode.
Status Branch VF VF displays the condition of the leased or dial connection. To access VF from the Status branch, make the following selection: Status: DeviceHS F1 F2 > VF F3 Select VF. Status:VF SigQual=Excelent F1 F2 > F3 If the modem is receiving a signal, the signal quality appears on the LCD’s bottom line. Press the key to scroll and view the receive signal level, signal-to-noise ratio, near end echo level, far end echo level, far end echo delay, and echo frequency offset.
COMSPHERE 3900 Series Modems NonLnearDist Non-Linear Distortion displays distortion which is usually associated with pulse-code modulation (PCM) compandor noise on the phone line. This value appears for Trellis Multipoint modulation. Retrains Retrains displays the number of retrains over the last 15 minutes of operation. The total 15-minute accumulation is updated every minute. This value appears for Trellis Multipoint modulation.
Status Branch 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. LSD DTR DSR Tst > _ * _ F1 F2 F3 The activity and state of the modem’s DTE signal appear on the LCD’s bottom line. Press the key to scroll other signals into view.
COMSPHERE 3900 Series Modems To access Backup from the Status branch, make the following selection: Press the key until Backup appears. Status: DTE F1 Backup F3 F2 Select Backup. Status:Backup Line=Pri 4w APL F1 F2 > F3 The configuration of the current operating line facility (either APL primary or backup) appears (Refer to Table 4-2). Press the key to display the next screen.
Status Branch Table 4-2 Backup Status Screens Active Line 1st Screen Display Inactive Line 2nd Screen Display Possible Inactive/Backup Line Condition Line=Pri 4w APL or Line=Pri 2w APL Bckup:2wAPL=XXXX or Bckup : Dial =(blank) 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).
COMSPHERE 3900 Series Modems 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.
Status Branch Press the key until Record appears. Select Record. Record Status Display Clear F1 F2 F3 To display sequence faults, select Display. Record Number 1 Modem O.K. F1 F2 F3 The LCD displays the first sequence fault field. (Sequence fault fields range from 1 to 8 and are identified by a number in the upper right corner.) Press the key to view the remaining fields. The message Modem O.K. appears if no sequence faults have occurred.
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DCP Configuration 5 Overview After installing a 391x Series modem, its software configuration options must be set using either the diagnostic control panel (DCP) or the AT command set. This chapter describes how to access and use the Configure branch of the Top-Level menu via the DCP. The Configure branch accesses the Edit Area which is a work space where you view and change any configuration options (straps).
COMSPHERE 3900 Series Modems Figures 5-1 and 5-2 graphically display the interaction between the edit area and configuration areas as viewed from the perspective of the DCP and the AT command set. CONTENTS OF Active (Saved) ARE AUTOMATICALLY COPIED TO Active (Operating) WHEN A SAVE IS COMMANDED VIA THE DCP, ON A RESET, OR ON POWER-UP.
DCP Configuration Active (Saved) (ATZ0, ATZ3) Customer1 (ATZ1) Customer2 (ATZ2) Factory S Sync Leased Answer (AT&F2) S Async Leased Answer (AT&F5) S TMp Control (AT&F7) S Async Dial (AT&F0) S Sync Dial (AT&F1) S Sync Leased Originate (AT&F4) S Async Leased Originate (AT&F6) S TMp Trib (AT&F8) S UNIX Dial (AT&F3) LOAD Active (Operating) USING ATZ OR AT&F COMMAND NOTE ON POWER-UP, Active (Saved) IS LOADED TO Active (Operating) Active (Operating) CHANGES MADE USING ANY AT COMMAND IMMEDIATELY AFFECT MODEM
COMSPHERE 3900 Series Modems Configure Branch The Configure branch of the Top-Level menu contains all of the modem’s configuration options (straps) which determine how the modem operates. These configuration options are accessed by scrolling down and across various levels of the Configure branch.
DCP Configuration 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.
COMSPHERE 3900 Series Modems 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.
DCP Configuration 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.
COMSPHERE 3900 Series Modems 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.
DCP Configuration Configuration Tables The modem’s configuration options are arranged into nine groups based on functionality: DTE Interface (Table 5-1), DTE Dialer (Table 5-2), Line Dialer (Table 5-3), Dial Line (Table 5-4), Leased Line (Table 5-5), V.42/MNP/Buffer (Table 5-6), Test (Table 5-7), Misc (Table 5-8), and Security (Chapter 12). Throughout these tables, two selections frequently appear on the LCD: Enable and Disable.
COMSPHERE 3900 Series Modems Table 5-1 (1 of 10) DTE Interface Configuration Options Async/Sync Mode: Sync Nxt Sync Async Asynchronous/Synchronous Mode. Determines whether the modem operates in Asynchronous mode or Synchronous mode. If the AT command set is enabled and this configuration option is set to Sync, then the modem operates in Async mode when offline. For Async Dial, Async Leased and UNIX Dial, Async is the factory default. The AT commands for Async Mode are &M0 or &Q0.
DCP Configuration Table 5-1 (2 of 10) DTE Interface Configuration Options Asyn Parity Bit: None Nxt None Even Odd Mark Space This configuration option only appears if Async/Sync Mode is configured for Async. Asynchronous Parity Bit. Determines the type of asynchronous parity bit. The parity of the DTE must match the parity of the modem. Parity options include None, Even, Odd, Mark, or Space. H None No parity bit is used.
COMSPHERE 3900 Series Modems Table 5-1 (3 of 10) DTE Interface Configuration Options DTR Action: Ignore Nxt Ignore Stndrd_RS232 CntrlsOnHook CntrlsTxMute Data Terminal Ready Action. DTR is a signal from the DTE to the modem indicating that the DTE is connected and ready for operation. H Ignore Modem assumes DTR is always ON. This is used when the DTE does not provide DTR. H Standard RS232 Allows the DTE to control DTR to the modem as specified in EIA-232-D and ITU-T V.24 specifications.
DCP Configuration Table 5-1 (4 of 10) DTE Interface Configuration Options 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. H 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 3900 Series Modems Table 5-1 (5 of 10) DTE Interface Configuration Options RTS Action: Stndrd_RS232 Nxt Stndrd_RS232 Ignore Sim_Cntl_Car Cntl_Car Request-to-Send Action. RTS is a signal from the DTE indicating the DTE has data to send. H Standard RS232 Allows the DTE to control RTS to the modem in normal EIA-232-D operation. RTS must be ON for the DTE to transmit to the modem. H Ignore Modem assumes RTS is always ON. Use this selection when the DTE does not provide RTS to the modem.
DCP Configuration Table 5-1 (6 of 10) DTE Interface Configuration Options CTS Control: Stndrd_RS232 Nxt Stndrd_RS232 Forced_On WinkWhenDisc Follows_DTR Follows_RTS40 Clear-to-Send Control. CTS is a signal from the modem to the DTE indicating that it can accept data from the DTE. H Standard RS232 In Synchronous mode, forces the state of CTS to follow the state of RTS in normal EIA-232-D operation. The minimum time that elapses between CTS and RTS is determined by the RTS/CTS Delay configuration option.
COMSPHERE 3900 Series Modems Table 5-1 (7 of 10) DTE Interface Configuration Options 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.
DCP Configuration Table 5-1 (8 of 10) DTE Interface Configuration Options TX Clock Source: Internal Nxt Internal External RXC_Loop This configuration option only appears if Async/Sync Mode is configured for Sync. Transmit Clock Source. Determines the source of timing for synchronous data transmitted from the modem to the analog channel. H Internal The transmit data’s clock source is derived from the modem’s internal clock. This clock is available as an output on Pin 15 (TXC) of the EIA-232-D interface.
COMSPHERE 3900 Series Modems Table 5-1 (9 of 10) DTE Interface Configuration Options CT111_Rate Cntl: Disable Nxt Disable Fallback1 Fallback2 CT111 Rate Control. 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. CT111 is also known as CH on the EIA-232-D interface. H Disable Disregards CT111 Rate Control.
DCP Configuration Table 5-1 (10 of 10) DTE Interface Configuration Options Extend Main Ch.: Disable Nxt Disable Enable Primary data can only be extended one link. Extend Main Channel. This configuration option supports extended diagnostics. Specifies whether there is main (primary) channel connectivity between the modem’s DTE ports and the DTE ports of modems one level below (downstream) or above (upstream) in the diagnostic network.
COMSPHERE 3900 Series Modems Table 5-2 (1 of 5) DTE Dialer Configuration Options DTE Dialer Type: Disable Nxt Disable AT V25bis_Async V25bis_Bsync V25bis_HDLC DTR=Direct1 AT&T_Exclusv Data Terminal Equipment Dialer Type. Identifies to the modem the type of dialing method and protocol used by the DTE. H Disable Disables any type of DTE dialing method. Dialing can only be performed using the DCP’s Dial command or attached telephone.
DCP Configuration Table 5-2 (2 of 5) DTE Dialer Configuration Options AT Escape Char: 043 ASCI Nxt " 043 ASCI This configuration option only appears if 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 AT Originate (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.
COMSPHERE 3900 Series Modems Table 5-2 (3 of 5) DTE Dialer Configuration Options CarriageRtn Char: 013 ASCI Nxt " 013 ASCI This configuration option only appears if DTE Dialer Type is configured for AT. Carriage Return Character. Allows you to change the ASCII character used to terminate an AT command to any ASCII value from 0 to 127. The AT command is S-Register S3=n, where n is a value from 0 to 127.
DCP Configuration Table 5-2 (4 of 5) DTE Dialer Configuration Options ExtendResltCode: Enable Nxt Enable Disable Add/EC Add/V42,MNP Use_DTE_Rate This configuration option only appears if DTE Dialer Type is configured for AT. Extended Result Codes. Informational messages such as VF data rate and Error Control are displayed with the result codes. (For a list of Extended Result Codes, refer to Table 14-1 in Chapter 14, AT Commands and S-Registers.
COMSPHERE 3900 Series Modems Table 5-2 (5 of 5) DTE Dialer Configuration Options AT Cmnd Mode: Normal Nxt Normal No_ERROR NoStrapOrERR This configuration option only appears if DTE Dialer Type is configured for AT. AT Command Mode. Determines how the modem responds to valid and invalid AT commands. H Normal Allows normal operation of the AT command set. The modem acts upon all valid AT commands and issues the ERROR result code for invalid commands.
DCP Configuration Line Dialer The Line Dialer configuration options establish parameters used by the modem to answer or originate calls. Table 5-3 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 3900 Series Modems Table 5-3 (2 of 5) Line Dialer Configuration Options Blind Dial Pause: 2sec Nxt 2sec 4sec 6sec 8sec 10sec 20sec This configuration option only appears when Dial Tone Detect is configured for Disable. Blind Dial Pause. Determines how long the modem waits before dialing a telephone number when Dialtone Detect is disabled. NOTE: The range of allowable values may be restricted in some countries. The AT command is S-Register S6=n, where n is from 2 to 255 in 1-second increments.
DCP Configuration Table 5-3 (3 of 5) Line Dialer Configuration Options 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. H 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 3900 Series Modems Table 5-3 (4 of 5) Line Dialer Configuration Options No Carrier Disc: 2sec Nxt 2sec Disable 5sec 10sec 20sec No Carrier Disconnect. If the modem no longer receives carrier from the remote modem, it disconnects the call. This configuration option determines how long carrier is OFF before the modem disconnects. Loss of carrier is one method of disconnecting a call.
DCP Configuration Table 5-3 (5 of 5) Line Dialer Configuration Options MakeBusyVia DTR: Disable End Disable Enable Make Busy Via DTR. Determines if the modem goes off-hook when DTR is OFF. Enable this setting if the DTE normally keeps DTR ON and turns DTR OFF when the DTE cannot accept a call. NOTE: This configuration option should only be used when the modem is located behind a user’s Private Branch Exchange (PBX).
COMSPHERE 3900 Series Modems Dial Line The Dial Line configuration options are used to configure the modem for operation over dial lines. Table 5-4 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.
DCP Configuration Table 5-4 (2 of 3) Dial Line Configuration Options V32bis Automode: Enable Nxt Enable Disable System 85 This configuration option only appears when Dial Line Rate is configured for V.32 terbo, V.32bis, or V.32 data rate. V.32bis 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.
COMSPHERE 3900 Series Modems Table 5-4 (3 of 3) Dial Line Configuration Options 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 V.32bis 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. H Disable No guard tone.
DCP Configuration Leased Line 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. Table 5-5 shows each Leased 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.
COMSPHERE 3900 Series Modems Table 5-5 (2 of 6) Leased Line Configuration Options LeasedLine Rate: 19200(V32t) Nxt 19200(V32t) 16800(V32t) 14400(V32b) 12000(V32b) 9600(V32b) 7200(V32b) 4800(V32b) 19200(TMp) 14400(TMp) 9600(TMp) 7200(TMp) 4800(TMp) 2400(TMp) 2400(V22bis) 14400(V33) 12000(V33) 9600(V29) 7200(V29) 4800(V29) 4800(V27bis) 2400(V27bis) Leased-Line Rate. Determines the modem’s data rate and modulation scheme for operation on leased lines.
DCP Configuration Table 5-5 (3 of 6) Leased Line Configuration Options V32bis Autorate: Enable Nxt Enable Disable This configuration option only appears when Leased Line Rate is configured for V.32 terbo or V.32bis data rate. V.32bis 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.
COMSPHERE 3900 Series Modems Table 5-5 (4 of 6) Leased Line Configuration Options AutoDialStandby: Disable Nxt Disable 15min 1hr 4hr Test(2min) Adv 15min Adv 30min Adv 1 hr TestAdv2min This configuration option is not available if the LeaseLine Rate is configured for TMp and the NetworkPosition is configured for Control. Automatic Dial Standby.
DCP Configuration Table 5-5 (5 of 6) Leased Line Configuration Options V27bis Train: Short Nxt Short Long This configuration option is only available if Leased-Line Rate is configured for V27bis. V.27bis Train. Controls the train time for V.27bis operation. The AT command is S-Register S70=n, where n is 0 for Short and 1 for Long. V29 TrainOnData: Disable Nxt Disable Enable This configuration option is only available if Leased-Line Rate is configured for V29. V.29 Train On Data.
COMSPHERE 3900 Series Modems Table 5-5 (6 of 6) Leased Line Configuration Options Lease_Lookback: Disable Nxt Disable Enable Lease Lookback. While operating on backup lines, this configuration option allows the modem to test the primary 4-wire leased lines for connectivity by detecting line energy across the normal line bandwidth. This test of the primary lines will not interrupt the data flow on the backup lines. The configuration option settings must be the same at both ends.
DCP Configuration Table 5-6 (1 of 7) V.42/MNP/Buffer Configuration Options Err Contrl Mode: V42/MNPorBfr Nxt V42/MNPorBfr V42/MNPorDsc MNP_or_Buffr MNP_or_Disc BufferMode DirectMode LAPM_or_Disc LAPM_or_Bufr This configuration option is only available if Async/Sync Mode is configured for Async. Error Control Mode. Determines the type of error control used by the modem. In most cases, V42/MNPorBfr is the best choice. If V.
COMSPHERE 3900 Series Modems Table 5-6 (2 of 7) V.42/MNP/Buffer Configuration Options Err Contrl Mode (Continued) Nxt V42/MNPorBfr V42/MNPorDsc MNP_or_Buffr MNP_or_Disc BufferMode DirectMode LAPM_or_Disc LAPM_or_Bufr The AT command for Buffer Mode is \N0. The AT command for Direct Mode 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.
DCP Configuration Table 5-6 (3 of 7) V.42/MNP/Buffer Configuration Options EC Negotiat Bfr: Disable Nxt Disable Enable Disab&Switch This configuration option is only available if Async/Sync Mode is configured for Async, and Error Control Mode is configured for V42/MNPorBfr, MNP_or_Buffr, or LAPM_or_Bufr. Error Control Negotiate Buffer.
COMSPHERE 3900 Series Modems Table 5-6 (4 of 7) V.42/MNP/Buffer Configuration Options Flw Cntl of DTE: CTS_to_DTE Nxt CTS_to_DTE Disable XON/XOFF This configuration option is only available if Async/Sync Mode is configured for Async, and Error Control Mode is not configured for DirectMode. Flow Control of DTE. Determines how the modem controls the flow of data from the DTE.
DCP Configuration Table 5-6 (5 of 7) V.42/MNP/Buffer Configuration Options XON/XOFF Psthru: Disable Nxt Disable Enable This configuration option is only available if Async/Sync Mode is configured for Async, 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. In this case, the DTE at one end of the communications link can send flow control characters to the other DTE.
COMSPHERE 3900 Series Modems Table 5-6 (6 of 7) V.42/MNP/Buffer Configuration Options Break Buffr Ctl: Keep_Data Nxt Keep_Data Discard_Data This configuration option is only available if Async/Sync Mode is configured for Async, and Error Control Mode is not configured for DirectMode. Break Buffer Control. Determines if data stored in the modem’s buffer is saved or discarded when the DTE issues a break sequence.
DCP Configuration Table 5-6 (7 of 7) V.42/MNP/Buffer Configuration Options BuffrDiscDelay: 10sec Nxt 10sec Disable 60sec This configuration option is only available if Async/Sync Mode is configured for Async, and Error Control Mode is not configured for DirectMode. Buffer Disconnect Delay. Determines how long the modem continues to transmit data stored in its buffers when the modem is commanded to disconnect by a locally attached DTE.
COMSPHERE 3900 Series Modems Test The Test configuration options determine specifics, such as the duration of a test, for the various diagnostic tests available to the modem. Table 5-7 shows each 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.
DCP Configuration Table 5-7 (2 of 2) Test Configuration Options Test Timeout: Disable Nxt Disable 30sec 60sec 240sec Test Timeout. Determines how long a test runs before aborting. H Disable Allows a test to run indefinitely. H 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.
COMSPHERE 3900 Series Modems Misc The Miscellaneous configuration options determine specifics for various functions, including network management parameters and remote modem access. Table 5-8 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.
DCP Configuration Table 5-8 (2 of 4) Miscellaneous Configuration Options Speaker Volume: Medium Nxt Medium Low High Speaker Volume. Controls the level of speaker volume. NOTE: Speaker Volume can also be temporarily set using the Control branch; however, a reset or power cycle will restore the modem to the Speaker Control and Speaker Volume configuration option settings. The AT command for Low is L0 or L1. The AT command for Medium is L2. The AT command for High is L3.
COMSPHERE 3900 Series Modems Table 5-8 (3 of 4) Miscellaneous Configuration Options 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.
DCP Configuration Table 5-8 (4 of 4) Miscellaneous Configuration Options Diag Connection: Modem(DC) Nxt Modem(DC) NMS(CC) Disable This configuration option is not available if the LeaseLine Rate is configured for TMp and the NetworkPosition is configured for Tributary. 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).
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Poll List Branch 6 Overview The Poll List function is not available on Point-to-Point control modems or Multipoint Tributary modems. The Poll List (Plist) branch of the Top-Level menu allows you to identify downstream modems in order to support health and status polling and download broadcasting. The maximum number of devices is 16 on the secondary channel and 64 on the diagnostic channel.
COMSPHERE 3900 Series Modems To access PList from the Top-Level menu, make the following selections: Leased:19.2 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 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 3900 Series Modems Press the key until Change appears. Select Change. 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 3900 Series 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.
Control Branch 7 Overview The Control branch of the Top-Level menu allows you to manage hardware and software functions, such as speaker volume, reset, busy out, and firmware download.
COMSPHERE 3900 Series Modems To access Control from the Top-Level menu, make the following selections: Leased:19.2 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 Misc in Chapter 5, DCP Configuration..
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 F3 F2 Select Reset.
COMSPHERE 3900 Series Modems If you want to disable the modem’s data stream, press the F2 key. When the message Command Complete appears, press the key to clear the message. Data Stream Port1 Enable F1 F2 F3 Press the F2 key again to enable the modem’s data stream. To exit this function and remain in the Control branch, press the the Top-Level menu, press the key. key. To exit and return to EIA LEDs Use the EIA LEDs function to change the port that controls the front panel LEDs.
Control Branch After selecting the desired interface, the message Command Complete appears on the bottom line of the LCD and the selected interface appears in the xxxxx field. To exit this function and remain in the Control branch, press the the Top-Level menu, press the key. key. To exit and return to NOTE The Port1 interface is the only display allowed on the 3911 modem, therefore, the entire EIA LEDs branch is masked.
COMSPHERE 3900 Series Modems 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. Service Line/Disconnect Service Line The Service Line function allows you to switch a specific Model 3911 installed in a COMSPHERE 3000 Series Carrier from normal leased or dial operation to service-line operation.
Control Branch Download Software The Download Software function sets parameters within the modem when transferring firmware to one or more modems or when receiving firmware upgrades from a locally attached PC-based controller. The latter is only performed by customer service personnel. There are two selections under Download Software: Clone Remote and To Local via DTE.
COMSPHERE 3900 Series Modems Clone Remote in Point-to-Point Configurations Before using Clone Remote in point-to-point configurations, perform the following: • Make sure the 391x Series modems have an established leased-line connection using either V.33, V.32terbo, V.32bis, V.32, or V.29 modulation (refer to the Leased Line section in Chapter 4) or a dial network connection using either V.32terbo, V.32bis or V.32 modulation (refer to Dial Line in Chapter 5, DCP Configuration).
Control Branch From the Choose DLL Type screen, press the key until DC_Broadcast appears. Press F1 or F2 to transfer an exact copy of the tributary modem’s firmware to the DC-connected control modem(s) using the Active Poll list. Proceed to Implementing a Clone Remote Operation on page 7-12, which follows the descriptions of multipoint cloning operations.
COMSPHERE 3900 Series Modems • For Single download configurations, know the remote access password and the network management address of the remote tributary modem that will receive the download. Refer to the Misc section in Chapter 4 for a description of the remote access password (RemAccssPasswrd) configuration option and the network management address (NetMngmtAddress) configuration option.
Control Branch After completing these actions, proceed to Implementing a Clone Remote Operation on page 7-12. 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 Implementing a Clone Remote Operation on page 7-12.
COMSPHERE 3900 Series 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 several minutes 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 Access Disabled The remote modem’s Access from Remote configuration is disabled. Password Invalid The local and remote modems’ passwords do not match. Correct the problem and attempt another download from the local modem. If this fails, contact your service representative. No Circuit There is no connection between the local and remote modem. After successful establishment of a Remote Cloning Download session, the following screens appear.
COMSPHERE 3900 Series Modems Press the key until VF_Thresh_Update appears. Press any function key to select VF_Thresh_Update. VF Thresholds Edit Save Reset F1 F2 F3 Select Edit. In the following example, the RSL High threshold is changed from 09 (– dBm) to 10. This example demonstrates VF threshold editing and saving. With the exception of Signal Quality, all VF thresholds may be modified in this manner.
Control Branch Press the key to move the cursor to the next position ( 9 ). Select the F2 ( " ) key to change the number above the cursor ( 9 ) to 0. RSL High (- dBm) Nxt " 10 F1 F3 F2 NOTE If you want to modify additional VF thresholds, select Nxt. To save the edited threshold(s): RSL High (- dBm) Nxt " 10 F1 Press the F2 F3 key to scroll up to the Edit/Save screen. VF Thresholds Edit Save Reset F1 F2 F3 Select Save.
COMSPHERE 3900 Series Modems To correct the invalid VF threshold, press the Edit/Save/Reset screen. key to return to the VF Threshold VF Thresholds Edit Save Reset F1 F3 F2 Select Reset to restore the original default values into memory. Repeat the Edit and Save procedure until the VF threshold(s) is valid and the Save completes successfully (Save Completed). To exit this function and remain in the Control branch, press the the Top-Level menu, press the key. key.
Test Branch 8 Overview The Test branch of the Top-Level menu allows you to initiate various modem tests. Use these tests if you are having data communication problems, such as periodic character loss, random errors, or constant format errors. By the process of elimination, you can usually isolate the fault in your system.
COMSPHERE 3900 Series Modems To access the Test branch from the Top-Level menu, make the following selections: Leased:19.2 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. To access Abort from the Test branch, make the following selection: Test: Abort F1 > Self F2 F3 Select Abort.
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 will cause the Remote mode session to be lost. The Remote mode session can be reestablished after the self-test is complete (usually one or two minutes).
COMSPHERE 3900 Series 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. Figure 8-1.
Test Branch The message Started appears on the LCD, and the Test LED lights for the duration of the test. If Invalid Command 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. If it is disabled, the test operates until aborted. For more information on the Test Timeout configuration option, refer to the Test section in Chapter 4.
COMSPHERE 3900 Series Modems Press the key until Rem_Digital_Loop appears. Press any function key to start this test. Test:Remote Loop Started F1 F2 F3 The message Started appears on the LCD, and the Test LED lights for the duration of the test. If Invalid Command 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.
Test Branch Test: Loc_Digital_Loop F1 Press the F3 F2 key until Loc_Digital_Loop appears. Press any function key to start this test. Test:Digitl Loop Started F1 F2 F3 The message Started appears on the LCD and the Test LED lights. If Invalid Command 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 display.
COMSPHERE 3900 Series Modems 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 < F3 F2 key until Pattern appears. Select Pattern to start this test.
Test Branch BlksErrd=xxxxxxx displays the number of blocks of data found in error (block size is 1000 bits per block). BlksRcvd=xxxxxxx displays the total number of blocks of data received. The message NoSync appears as a value for BlksErrd while the modem’s receiver is synchronizing. The message OvrFlw appears as the value for BlksErrd if the counter overflows. Press the key to display BlksRcvd=xxxxxxx, number of blocks of data received.
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Sub-Network Health and Status Branch 9 Overview 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. “Status” Status Configure Plist Control Call_Setup Test Tlk/Data Security Remote SubHS To access the SubHS branch from the Top-Level menu, make the following selections: Leased:19.
COMSPHERE 3900 Series Modems Press the key until SubHS appears. Select SubHS. NOTE If there are no modems in the multipoint 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.
10 Call Setup Branch Overview The Call Setup function is not available in TMp Control mode. For dial backup applications, the Call Setup branch of the Top-Level menu allows you to dial, disconnect, and answer telephone calls. For leased backup applications, the Call Setup branch allows you to switch between the primary leased line and the backup leased line. In leased backup operation, a 2-wire leased line is used as the backup facility instead of the normal 2-wire dial line.
COMSPHERE 3900 Series Modems To access the Call Setup branch from the Top-Level menu, make the following selections: Leased:19.2 Call_Setup F1 Press the F3 F2 key until Call_Setup appears. Select Call_Setup. Dial For dial backup applications, Dial allows you to dial any telephone number stored in directory locations 1–24. Any telephone number dialed using the DCP must already exist in a directory location.
Call Setup Branch 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 F3 F2 The Call Setup status Off Hook appears during the connection process. If the connection is successful, one of the Normal Operation status messages (Table 3-3 in Chapter 3, DCP Operation) appears on the LCD. If the connection is not successful, the LCD displays one of the Call Failure status messages (Table 3-3 in Chapter 3, DCP Operation).
COMSPHERE 3900 Series Modems 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 Line Dialer in Chapter 5, DCP Configuration.) For leased backup applications, Answer allows the modem to begin the handshaking process with the remote modem.
Call Setup Branch Dial Standby/Return to Dial When the modem is operating in Dial Backup mode (DialBckUp), Dial Standby and Return to Dial allow the modem to switch back and forth between primary leased-line and primary leased-line backup operation while still maintaining the backup connection (Figure 10-1). Switching between backup and primary leased-line operation can be performed manually or automatically.
COMSPHERE 3900 Series Modems To access Dial Standby or Return to Dial from the Call Setup branch, make the following selections: Call Setup: Dial Standby F1 Press the F2 F3 key until Dial Standby or Return_to_Dial appears. Select the appropriate function. Dial Standby Command Complete F1 F2 F3 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.
Call Setup Branch Press the key until Change_Directory appears. Press any function key to select Change_Directory. 01:551234z Nxt " F1 F2 # F3 The phone number listed in directory location 1 appears. Select Nxt to display other directory locations. 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.
COMSPHERE 3900 Series Modems To save the number just entered, scroll to the next directory location by selecting Nxt. The number is now stored in nonvolatile memory. Table 10-1 describes what can be entered in directory locations. 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 391x Series modems recognize: T — Tone (DTMF) dial.
Call Setup Branch Directory Status (Does Not Appear in North America) Directory Status displays the status of each directory location. To access Directory Status from the Call Setup branch, make the following selections: Call Setup: Directory_Status F1 F2 < F3 Press the key until Directory_Status appears. Press any function key to select Directory_Status. Number Status Nxt 01:Allowed F1 F2 F3 Select Nxt to display other directory locations.
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11 Talk/Data Branch Overview The Talk/Data function is not available in TMp Control mode. The Talk/Data branch of the Top-Level menu allows you to switch the modem between Talk mode and Data mode when manually dialing using either the DCP or an externally attached telephone. 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 (refer to Appendix C, Pin Assignments). This cable is not supplied with your modem.
COMSPHERE 3900 Series 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 Line Dialer in Chapter 5, DCP Configuration) must be set to Disable. This configuration option does not appear on Models 3910-A1-401 and 3911-B1-001. If you are originating a call using a telephone and the remote modem is configured for Auto-Answer, perform the following procedure. Idle:19.
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 Line Dialer in Chapter 5, DCP Configuration) must be set to Disable. This configuration option does not appear on Models 3910-A1-401 and 3911-B1-001. If you are originating a call using a telephone and the remote modem is configured for Manual Answer, perform the following procedure.
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12 Dial Access Security Overview NOTE This chapter supports the operation of dial access security for the COMSPHERE 391x Series modems. This chapter is self supporting and can be removed to prevent unwanted knowledge of dial access security operation. Although the security functions described in this chapter are designed to prevent unwanted user access to your network, the company recognizes that no security system is infallible.
COMSPHERE 3900 Series Modems Originate Access Security Originate Access lets you control who can originate a call from a local modem via the AT command set. This is useful in LAN and modem pooling applications. With Originate Access security, a local user’s password is embedded in the AT dial command. If the password is valid, the user can dial out using this modem.
Dial Access Security The following examples illustrate two ways to enter a VF-side password: ATDP5551234TW12345678# or ATDT5551234@12345678# Where: ATD is the AT dial command. P and T are the Pulse dial and Tone (DTMF) dial modifiers. 5551234 is the phone number. W or @ is the VF Prompt Tone option setting for second dial tone or quiet answer. 12345678 is the VF-side password. # is the password termination character.
COMSPHERE 3900 Series Modems Combination of VF-Side and DTE-Side Passwords The previously described methods of password entry can be combined to provide two layers of security. In this case, the modems negotiate VF-side password entry prior to training. If successful, the modems connect and then prompt the originating user for a valid password. If correctly entered, the modems connect.
Dial Access Security 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.
COMSPHERE 3900 Series Modems 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.
Dial Access Security 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 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.
COMSPHERE 3900 Series Modems Table 12-1 (2 of 2) Edit Password Table Group Options H VF plus DTE Indicates that both layers of password entry are used with this index’s password. This location is configured so that the answering modem sends a prompt for the DTE-side password after receiving a valid VF-side password. This setting requires that the Set Answer Security option be set to VF_&_DTE.
Dial Access Security 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. To access Set Answer Sec from Set Access Ctrl, make the following selections: Set Access Ctrl Set_Answer_Sec F1 Press the F3 F2 key until Set_Answer_Sec appears.
COMSPHERE 3900 Series Modems 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.
Dial Access Security 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.
COMSPHERE 3900 Series Modems 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.
Dial Access Security 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. Table 12-4 shows each Security configuration option as it appears on the LCD. The factory default value is shown after the colon ( : ) on the first line; all available selections are listed on the second line. Following this is a description of the configuration option.
COMSPHERE 3900 Series Modems Table 12-4 (2 of 3) Security Configuration Options 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 from 0 to 127. DTE_PW_BkSpChar: 008 Nxt " 008 This configuration option does not appear if Answer Security Mode is configured for No_Answ_Sec. DTE Password Backspace Character.
Dial Access Security Table 12-4 (3 of 3) Security Configuration Options H VF & DTE The answering modem is enabled for security. The modems negotiate security using the VF-side password entry technique protocol. If successful, and the Password Type for this particular VF password is set for VF_&_DTE, a password is requested from the originating user. If successful, the modems connect and can pass data.
COMSPHERE 3900 Series Modems Security Password Entry Techniques The previous sections described how to set up and configure your network for dial access security. Once configured and enabled, you must now supply a password to originate or answer a call. The following examples demonstrate how to enter an Answer Access security password string and an Originate Access password string.
Dial Access Security Originate Access Password An Originate Access password is entered by a local user to gain access to a local 391x Series modem. This password is embedded in the AT dial command and cannot be entered from the diagnostic control panel (DCP). The following example describes how to enter an Originate Access security password: TYPE: ATD%abc123%T9,8005551234 PRESS: Enter Where: ATD is the AT dial command. T is the Tone (DTMF) dial modifier.
COMSPHERE 3900 Series 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 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.
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Dial Access Security NOTE This page is self-supporting and can be removed for security reasons. 00282600 Dial Access Security To clear the dial access security alarm light from the modem’s front panel, do the following: 3. Press the key to return to the Top-Level menu. 4. Press F1 to access the Status branch. 5. Press F1 again to select DeviceHs. 6. Press F3 to select Security. 7. From the Security branch, press F1 twenty (20) times. The security alarm light clears.
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13 Remote Branch Overview 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. This function is only available when using either V.32terbo, V.32bis, V.32, TMp, V.33, or V.29 modulation schemes.
COMSPHERE 3900 Series 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 3900 Series Modems If operation over the secondary channel is desired, press any function key to select the secondary channel. Secondary channel only appears if using V.32terbo, V.32bis, V.32 or TMp modulation. If operation over the primary channel is desired, press the key until primary displays and press any function key. Primary channel operation is not available when initiating a Remote function from a TMp tributary modem. Online:14.
Remote Branch • If a connection is established but the wrong password is stored, the status message Password Invalid appears on the LCD. This configuration option must be enabled by the remote user. (Refer to the Remote Access Password configuration option in Table 5-8 of Chapter 5, DCP Configuration.) • The Remote mode command displays Other Test Active if an Analog Loopback test is currently running.
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14 AT Command Set and S-Registers Overview The AT command set provides an alternative method to the modem’s DCP for entering commands that control the operation and configuration of the 391x Series modems. This chapter discusses guidelines necessary to operate AT commands as well as listing the modifiers for all AT commands supported by the 391x Series modems. AT commands are issued from asynchronous DTEs. Operating Modes The 391x Series modem has two operating modes, Command mode and Data mode.
COMSPHERE 3900 Series Modems Use the O command to return to Data mode from online Command mode. Enter the following command: TYPE: ATO PRESS: Enter Command Guidelines Review the following guidelines before using any AT Commands. • The escape sequence ( + + + ) is used to enter online Command mode from Data mode. • The asynchronous character format for the AT command set must be one of the following: — 8 data bits + no parity + 1 stop bit. — 7 data bits + no parity + 2 stop bits.
AT Command Set and S-Registers Result Codes Table 14-1 lists all valid result codes for the 391x Series modem.
COMSPHERE 3900 Series Modems Table 14-1 (2 of 2) Result Codes Numbers (1) Numbers (2) 28 28 CONNECT 38400** Connection at 38,400 bps 29 14 CONNECT 19200/ EC** Connection at 19,200 bps with error control 30 30 CONNECT 57600** Connection at 57,600 bps 77 77 FORBIDDEN Forbidden number 78 78 DELAYED Delayed number Word Description * Only appears when the Extended Result Codes configuration option is enabled.
AT Command Set and S-Registers Table 14-2 (1 of 10) 391x Series 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 Dial. Begins the dialing sequence. The dial string n (modifiers and telephone number) is entered after the D command.
COMSPHERE 3900 Series Modems Table 14-2 (2 of 10) 391x Series AT Commands AT Command Description Dn (cont.) @ — Quiet answer. Wait for five seconds of silence after dialing the number. If the silence is not detected, the modem sends either a NO ANSWER result to the DTE. ! — Hook flash. This causes the modem to go on-hook for 0.5 seconds then return to off-hook. ; — Return to Command mode. Modem returns to Command mode after dialing a number without disconnecting the call.
AT Command Set and S-Registers Table 14-2 (3 of 10) 391x Series AT Commands AT Command Description DCP LCD Command Sequence O Return to Online or Data Mode. Returns modem to Data mode from Online Command mode. None P Pulse Dial. Sets the modem for Pulse Dial mode. Configure\Edit\ Line Dialer NOTE: Pulse Mode is disabled in Denmark and Sweden. Qn Result Codes. Q0 Q1 Q2 Enables modem to send result codes to the DTE. Disables modem from sending result codes to the DTE.
COMSPHERE 3900 Series Modems Table 14-2 (4 of 10) 391x Series 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 (5 of 10) 391x Series AT Commands AT Command Zn &Cn &Dn Description Reset and Load Active. Control\Reset Z0 Loads configuration options from Active (Saved) to Active (Operating). Z1 Loads configuration options from Customer 1 to Active (Operating). Z2 Loads configuration from Customer 2 to Active (Operating). Z3 Loads configuration options from Active (Saved) to Active (Operating) and performs a reset. LSD Control. &C0 Forced On. LSD ON at all times.
COMSPHERE 3900 Series Modems Table 14-2 (6 of 10) 391x Series AT Commands AT Command &Fn Description Select Factory Default Configuration Options. Loads factory configuration options into Active (Operating) area. &F0 &F1 &F2 &F3 &F4 &F5 &F6 &F7 &F8 DCP LCD Command Sequence Configure/ Factory Async Dial Sync Dial Sync Leased: Answer UNIX Dial Sync Leased: Originate Async Leased: Answer Async Leased: Originate TMp: Control TMp: Trib Only the &F0 and &F3 commands will leave you in AT Command mode.
AT Command Set and S-Registers Table 14-2 (7 of 10) 391x Series AT Commands AT Command &Mn and &Qn Description Async/Sync Mode and DTE Dialer Type. &M0, &Q0 Modem operates in Asynchronous mode and uses AT Command protocol. DCP LCD Command Sequence Configure\Edit\ DTE Dialer &M1, &Q1 Modem operates in Synchronous mode and uses 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.
COMSPHERE 3900 Series Modems Table 14-2 (8 of 10) 391x Series AT Commands AT Command &Vn Description View Configuration Options. Displays each configuration group within the Active (Operating), Active (Saved), Customer 1, and Customer 2 configuration areas as well as the telephone numbers stores in directory locations 1–24. &V0 &V1 &V2 &V3 &V4 &Wn &Xn &X1 &X2 &Zn=x Configure\Save Saved to Active(Save). Saved to Customer 1. Saved to Customer 2. Transmit Clock Source.
AT Command Set and S-Registers Table 14-2 (9 of 10) 391x Series AT Commands AT Command \Dn CTS Control. \D0 \D1 \D2 \D3 \D4 \Gn Forced On. Forces CTS to always ON. Standard RS232. Wink When Disconnect. CTS is turned OFF for 1 to 2 seconds upon a disconnect. Follows DTR. The state of CTS follows the state of DTR. Follows RTS. The state of CTS follows the state of RTS. Modem to Modem Flow Control. \G0 \G1 \Kn Buffer Control, Send Break Control, Break Forces Escape.
COMSPHERE 3900 Series Modems Table 14-2 (10 of 10) 391x Series AT Commands AT Command \Tn DCP LCD Command Sequence Description No Data Disconnect Timer. \T0 \Tn Disable. Where n is a value from 1 to 255 in 1-minute increments. Configure\Edit\ Line Dialer NOTE: The factory default value is country dependent. \Xn XON/XOFF Passthrough Flow Control. \X0 \X1 %An Disable. Enable. Error Control Fallback Character. %An %Cn Where n is an ASCII value from 0 to 127. Factory default is 013 ASCII.
AT Command Set and S-Registers S-Register Format S-Registers can be displayed and/or modified when the modem is in Command mode. To display the value of an S-Register, issue the following command: TYPE: ATSn? Where: n is the register number. PRESS: Enter To modify the value of an S-Register, issue the following command: TYPE: ATSn=r Where: n is the register number, and r is the new value.
COMSPHERE 3900 Series Modems Table 14-3 (2 of 13) 391x Series S-Registers S-Register S5 Description Backspace Character. Register determines ASCII value used as the backspace (Backspace key). This character moves the cursor to the left and erases the previous character. DCP LCD Command Sequence Configure\Edit\ DTE Dialer Enter a value from 0–127. The factory setting is 8 (backspace key). S6 Blind Dial Pause1.
AT Command Set and S-Registers Table 14-3 (3 of 13) 391x Series S-Registers Description S-Register S40 Auto Make Busy. Register determines if the modem goes off-hook under certain conditions. This register should only be enabled when the modem is located behind a user’s Private Branch Exchange (PBX). This register is only valid for Model 3911 modems. DCP LCD Command Sequence Configure\Edit\ Line Dialer Register has the following values: 0 = Disable 1 = Enable The factory setting is Disable.
COMSPHERE 3900 Series Modems Table 14-3 (4 of 13) 391x Series S-Registers S-Register S44 Description 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.32bis) 4 = 7200 (V.32bis) 5 = 4800 (V.32bis) 6 = 2400 (V.22bis) 11 = 14,400 (V.
AT Command Set and S-Registers Table 14-3 (5 of 13) 391x Series S-Registers S-Register S47 Description Auto Dial Standby. Register determines if the modem performs an automatic dial standby if in Dial Backup mode. DCP LCD Command Sequence Configure\Edit\ Leased Line Register has the following values: 0 = Disable 1 = 15 minutes 2 = 1 hour 3 = 4 hours 4 = Test(2min) 5 = Adv 15min 6 = Adv 30min 7 = Adv 1 hr 8 = Adv2minTest The factory setting is Disable. S48 Leased-Line Carrier On Level.
COMSPHERE 3900 Series Modems Table 14-3 (6 of 13) 391x Series S-Registers Description S-Register S53 V.54 Address. Identifies the address of the modem to be placed in a loopback test. DCP LCD Command Sequence Configure\Edit\ Tests Register has the following values: 0 = Disable 1–34 = Modem address The factory setting is Disable. S54 V.54 Device Type. Identifies where the modem is physically located in the network.
AT Command Set and S-Registers Table 14-3 (7 of 13) 391x Series S-Registers Description S-Register S61 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.
COMSPHERE 3900 Series Modems Table 14-3 (8 of 13) 391x Series S-Registers S-Register Description S66 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).
AT Command Set and S-Registers Table 14-3 (9 of 13) 391x Series S-Registers Description S-Register S72 RTS Antistreaming. Register determines the antistreaming operation of the modem. DCP LCD Command Sequence Configure\Edit\ DTE Interface Register has the following values: 0 = Disable 1 = 10 sec 2 = 30 sec 3 = 1 min 4 = 2 min 5 = 3 min 6 = 5 min The factory setting is Disable. S74 Network Position Identification. Register identifies each modem as either a control or tributary modem.
COMSPHERE 3900 Series Modems Table 14-3 (10 of 13) 391x Series S-Registers Description S-Register S82 V.32bis Autorate (Leased Line). Register determines if Autorating is used on leased lines when connected in V.32bis mode. DCP LCD Command Sequence Configure\Edit\ Leased Line Register has the following values: 0 = Enable 1 = Disable The factory setting is Enable. S84 AT Command Mode. Register determines how the modem responds to valid and invalid AT commands.
AT Command Set and S-Registers Table 14-3 (11 of 13) 391x Series S-Registers S-Register S89 Description DCP LCD Command Sequence V.42 Automatic Request for Retransmission (ARQ) Window Size Increase. Register allows the ARQ window size to be set to a value from six frames to fifteen frames. For best performance, this register should remain at its default setting of six frames (ATS89 = 0). The only reason to change it is for satellite delays.
COMSPHERE 3900 Series Modems Table 14-3 (12 of 13) 391x Series S-Registers Description S-Register S93 V.29 Retrain. When enabled, the modem transmits a training sequence whenever it receives one. This configuration option should normally be disabled for control modems. DCP LCD Command Sequence Configure\Edit\ Leased Register has the following values: 0 = Enable 1 = Disable The factory setting is Enable. S94 V29 Link Configuration. Selects point-to-point or multipoint operation.
AT Command Set and S-Registers Table 14-3 (13 of 13) 391x Series S-Registers S-Register S97 Description Reduced Asynchronous Buffer Size. Register limits the modem’s buffer size to a maximum of 20 characters. DCP LCD Command Sequence Configure\Edit\ V42/MNP/Buffer Register has the following values: 0 = Disable 1 = Enable The factory setting is Disable. S98 Special Standby. Supports automatic dial standby when a third modem is used for dial backup.
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Menu Tree A Overview Pages A-2 and A-3 provide a menu tree for the 391x Series modems.
COMSPHERE 3900 Series Modems "Status" Status Displays current status of modem along with data rate and error control mode.
Menu Tree from previous page Control SubHS Tlk/Data Test Remote Call_Setup Security (Dial Backup only) Dial Answer Disconnect Choose Address (TMP Control only) Change_Directory Dial_Standby or Return_to_Dial Choose Password (TMP only) Directory_Status (Does not appear in North America) (Not in TMp Trib) Directory Locations 1 – 24 Self Abort (3910 only) Rem_Digital_Loop Loc_Analog_Loop Secondary (ExitRem appears instead of Remote when using Remote mode) Pattern Loc_Digital_Loop Set_A
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Troubleshooting B Overview This appendix points out basic problems that can occur when operating a 391x Series modem. Use Tables B-1 through B-6 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. With these tests you can usually isolate the fault in your system by using the process of elimination.
COMSPHERE 3900 Series 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, DCP Configuration. Verify that the DTE Dialer Type configuration option is set to AT.
COMSPHERE 3900 Series 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. Make sure the VF line is connected to the modem’s rear jack labeled DIAL. 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, DCP Configuration.
Troubleshooting Table B-5 (2 of 2) Modem — VF Connection Symptom The modem does not go off-hook and begin dialing. Action If using AT Dialing, refer to Table B-4, Modem—DTE Connection. If using DTR Dialing, verify the telephone number stored in directory location 1, and verify that the DTE is raising DTR from Off to ON to initiate a dial. If using V.
COMSPHERE 3900 Series Modems Table B-6 Online Operation Action Symptom The data is scrambled. Verify that the character format (data bits, parity, and stop bits) is set to the same value in both modems. Data is missing during a transfer. Verify that you are using the same method of flow control for both the modem and the DTE. If using XON/XOFF flow control, verify that the modem’s parity matches the DTE’s parity.
Pin Assignments C Overview This appendix lists EIA-232-D and VF TELCO pin assignments and provides information about auxiliary cables which are not supplied.
COMSPHERE 3900 Series 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 3910 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 3900 Series 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 3900 Series Modems To connect a Model 3910 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. 1 1 TXD 2 2 TXD RXD 3 3 RXD RTS 4 4 RTS 5 5 DSR 6 6 DSR SG 7 7 SG LSD 8 8 LSD 9 9 10 10 11 11 12 12 13 13 14 14 15 15 16 16 17 17 18 18 19 19 20 20 21 21 22 22 23 23 24 24 25 25 RXC DTR XTXC RXC DTR XTXC Figure C-4.
ITU-T V.25bis Dialing Commands and Responses D Overview This appendix describes V.25bis dialing commands and responses. ITU-T V.25bis is an international dialing protocol that permits direct and stored number dialing using DTEs in either Asynchronous, Bisynchronous, or HDLC operating mode. The 391x Series modems support V.25bis request and answer commands.
COMSPHERE 3900 Series Modems Call Request with Stored Memory Address Provided (CRS) The CRS command dials the telephone number stored in the request directory location. CRS is similar to the ATDS command. The CRS command format is: CRSx Where: x is directory location 1–24. The modem responds to the command with either a VAL (valid) or INV (invalid) response followed by a call progress report such as connect (CNX) or failure (CFI).
ITU-T V.25bis Dialing Commands and Responses Delayed Call Indicator The DLC response is issued to the DTE if the modem is not currently allowed to call the number. DLC is similar to the AT result code DELAYED. The DLC response format is: DLCn Where: n is the delay (in minutes) before the number can be called. Call Answer Commands Call Answer commands disable or enable the modem’s AutoAnswer function. These commands are issued from the DTE.
COMSPHERE 3900 Series Modems Program Normal (PRN) The Program Normal (PRN) command allows the DTE to enter and store a telephone number to a specific directory location. PRN is similar to the AT&Z command. The PRN command format is: PRNx;n Where: x is the directory location 1–24; n is the telephone number. Request List of Delayed Numbers (RLD) The Request List of Delayed Numbers (RLD) command displays telephone numbers that are currently delayed as a result of failed call attempts.
ITU-T V.25bis Dialing Commands and Responses List Delayed Numbers Response (LSD) LSD is a response to an LSD command issued by DTE. LSDx;n;d Where: x is a sequence number (not a directory location). n is the telephone number. d is the delay in minutes List Forbidden Numbers Response (LSF) The LSF response format is : LSFx;n Where: x is a sequence number (not a directory location). n is the telephone number. List Stored Numbers Response (LSN) LSN is a response to an RLN command issued by the DTE.
COMSPHERE 3900 Series Modems 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. The INV response format is: INVxx Where: xx is CU command unknown. MS message syntax error. PS parameter syntax error. PV parameter value error. Table D-1 lists V.25bis commands supported by the 391x Series modems. Table D-1 V.25bis Commands V.
ITU-T V.25bis Dialing Commands and Responses Table D-2 lists V.25bis response messages supported by the 391x Series modems. Table D-2 V.25bis Response Messages Description V.
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ASCII Character Table E Overview Table E-1 in this appendix provides the ASCII character table.
COMSPHERE 3900 Series Modems Table E-1 (2 of 4) ASCII Characters E-2 Hexadecimal ASCII Value Decimal ASCII Value Control Character Key 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 CTRL-_ 20 032 spacebar 21 033 ! 22 034 “ 23 035 # 24 036 $ 25 037 % 26 038 & 27 039 ’ 28 040 ( 29 041 ) 2A 042 * 2B 043 + 2C 044 , 2D 045 - 2E 046 .
ASCII Character Table Table E-1 (3 of 4) ASCII Characters 3910-A2-GN32-40 Hexadecimal ASCII Value Decimal ASCII Value Control Character 3D 061 = 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 49 073 I 4A 074 J Key 4B 075 K 4C 076 L 4D 077 M 4E 078 N 4F 079 ) 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 0
COMSPHERE 3900 Series Modems Table E-1 (4 of 4) ASCII Characters E-4 Hexadecimal ASCII Value Decimal ASCII Value Control Character 61 097 a 62 098 b 63 099 c 64 100 d 65 101 e 66 102 f 67 103 g 68 104 h 69 105 i 6A 106 j 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 Key 79 121 y 7A 122 z 7B 123 { 7C 124 | 7D 125 } 7E 126 - 7F 127 d
Default Configuration Options F Overview Table F-1 lists all default configuration options for the factory preset configurations. An N/A indicates that the value for this configuration option does not appear on the LCD when that factory default configuration is selected.
COMSPHERE 3900 Series Modems Table F-1 (1 of 7) 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 Async/Sync Mode Sync Async Sync Async Async Sync Async DTE Rate N/A 19,200 bps N/A 19,200 bps 19,200 bps N/A Async # Data Bits N/A 8 N/A 8 8 N/A Async Parity Bit N/A None N/A None None N/A Asyn
Default Configuration Options Table F-1 (2 of 7) 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 Dialer DTE Dialer Type Disable AT Disable AT AT Disable AT Escape Character N/A 043 ASCII N/A 043 ASCII 043 ASCII N/A Escape Guard Time N/A 1 sec N/A 1 sec 1 sec N/A Break Forces Escape N/A Disable N/A Dis
COMSPHERE 3900 Series Modems Table F-1 (3 of 7) 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 Line Dialer Auto-Answer Ring Count1 1 1 1 1 1 1 Dialer Type Tone Tone Tone Tone Tone Tone Dial Tone Detect Enable Enable Enable Enable Enable Enable Blind Dial Pause N/A N/A N/A N/A N/A N/A Busy Tone Detect
Default Configuration Options Table F-1 (4 of 7) 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 Leased Line Leased Mode 4-wire LL Answer (Sync Leased Answ) or 4-wire LL Originate (Sync Leased Orig) 4-wire LL Answer (Async Leased Answ) or 4-wire LL Originate (Async Leased Orig) 4-wire LL Originate (TMp Tributary) or 4-wire LL
COMSPHERE 3900 Series Modems Table F-1 (5 of 7) 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.42/MNP/ Buffer Error Control Mode N/A (Direct) V.42/MNP or Buffer N/A (Direct) V.42/MNP or Buffer V.42/MNP or Buffer N/A (Direct) V.
Default Configuration Options Table F-1 (6 of 7) 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 Misc Straps When Disconnected No Change No Change No Change No Change No Change No Change Speaker Control On Until Carrier On Until Carrier On Until Carrier On Until Carrier On Until Carrier On Until Carrier Speaker Volu
COMSPHERE 3900 Series Modems Table F-1 (7 of 7) 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 Security Entry Wait Time 20 sec 20 sec 20 sec 20 sec 20 sec 20 sec VF Prompt Type 2nd Dial Tone 2nd Dial Tone 2nd Dial Tone 2nd Dial Tone 2nd Dial Tone 2nd Dial Tone DTE Password Tries 1 1 1 1 1 1 DTE Password Term
Sample Configurations G Overview This appendix provides diagrams of sample configurations for the 391x Series modems. Following each diagram, the appropriate configuration options and cables are listed.
COMSPHERE 3900 Series Modems Point-to-Point Figure G-1 shows a sample configuration for point-to-point applications. 19200(V32t) 19200(V32t) TX DTE (Sync) 3910 Cable 1 TX Leased A 3910 Cable 2 Cable 2 DTE (Sync) B Cable 1 Figure G-1. Sample Configuration — Point-to-Point Configuration Options 3910 A Use Sync Leased (Answer) default configuration options. 3910 B Use Sync Leased (Originate) default configuration options. Cable 1 Use a standard, customer-supplied, EIA-232-D/V.
Sample Configurations Multipoint Figure G-2 shows a sample configuration for multipoint applications. TMp control modems can accept mixed inbound rates from tributary modems. For example, one inbound link may be configured for 14.4 kbps while another link experiencing line impairments may be configured for 9.6 kbps. The following control/tributary rate combinations are allowed: control at 19.2 kbps, tributaries at 14.4 or 9.6 kbps; control at 14.4 kbps, tributaries at 14.4 or 9.6 kbps; control at 9.
COMSPHERE 3900 Series Modems Point-to-Point with Automatic Dial Backup Figure G-3 shows a sample configuration for point-to-point applications with automatic dial backup. Dial Cable 3 Cable 3 19200(V32t) 19200(V32t) TX DTE (Sync) TX 3910 Cable 1 Leased A 3910 Cable 2 Cable 2 DTE (Sync) B Cable 1 Figure G-3.
Sample Configurations Point-to-Point with Network Management Figure G-4 shows a sample configuration for point-to-point applications with network management. 19200(V32t) 19200(V32t) TX DTE (Sync) 3910 NMS Cable 1 TX Leased A 3600F3300 CC IN 3910 Cable 2 Cable 2 DTE (Sync) B Cable 1 Hubbing Device Cable 4 NMS (6700 or 6800) Adapter (002-0025-0031) Figure G-4.
COMSPHERE 3900 Series Modems Carrier with Network Management Figure G-5 shows a sample configuration for COMSPHERE 3000 Series Carrier applications with network management. 19200(V32t) 19200(V32t) TX DTE (Sync) Cable 1 TX Leased 3911 SDU Circuit Card DTE (Sync) 3910 Cable 2 Cable 2 Cable 1 CC IN COMSPHERE 3000 Series Carrier NMS (6700 or 6800) Cable 4 Adapter (002-0025-0031) Figure G-5.
Sample Configurations Extended Multipoint Figure G-6 shows a sample configuration for extended multipoint applications.
COMSPHERE 3900 Series Modems Configuration Options 3920 A Use Sync Leased (Answer) default configuration options with the following exception: Rate at 19.2K Set ports 1, 2, 3, and 4 to 4800. 3920 B Use Sync Leased (Originate) default configuration options with the following exceptions: TX Clock Source Set to RXC_Loop. Rate at 19.2K Set ports 1, 2, 3, and 4 to 4800. Port TXC Source Set port 4 to External.
Sample Configurations Extended Diagnostics Figure G-7 shows a sample configuration for extended diagnostics. Figure G-7. Sample Configuration Extended Diagnostics Configuration Options 3910-A2-GN32-40 3910 A Use Sync Leased (Answer) default configuration options with the following exception: Network position Set to Control. 3910 B Use Sync Leased (Originate) default configuration options with the following exception: TX Clock Source Set to External. Diagnostic Connection Set to Modem (DC).
COMSPHERE 3900 Series Modems 3910 D,F,H Use Sync Leased (Answer) default configuration options with the following exceptions: TX Clock Source Set to RXC_Loop. 3910 E,G Use Sync Leased (Answer) default configuration options with the following exceptions: Diagnostic Connection Set to Modem (DC). Network Position Set to Control. 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.
Equipment List Equipment 3910-A2-GN32-40 H Feature/ Part Number Model 3910 3910-A1-40X Model 3911 3911-B1-00X 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 327-0074-0131 3600 Hubbing Device 3600-F3-300 EIA-323-D/V.
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Glossary Active (Operating) A configuration area containing configuration options currently in use by the modem. When a power cycle occurs, 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. Any changes made to configuration options can be saved using either the DCP’s Save command or by issuing an AT&W0 command.
COMSPHERE 3900 Series Modems baud A unit of signaling speed that is equal to the number of symbols per second. This is not necessarily the same as bits per second, although the terms are frequently interchanged. Bell 103J A standard for 300 bps data transmission. Bell 212A A standard for 1200 bps data transmission. bis Latin for twice. Used to distinguish the second version of a standard from other versions; e.g., V.32bis. bisync Binary synchronous communications.
Glossary constant carrier mode The modem transmits a carrier signal constantly, regardless of RTS. Control Channel (CC) The diagnostic interface between a network management system and a network device. control modem It polls downstream tributary modems across the analog channel. controlled carrier mode The mode in which the modem’s transmitter turns on and off in response to RTS. This mode is used by multipoint tributary modems.
COMSPHERE 3900 Series Modems download A process that transfers device firmware and software from a locally-attached PC to a device, or allows the duplication of firmware and software from a local device to a remote device. downstream device A device that is connected farther from the host computer. DTE Data Terminal Equipment. The equipment, such as a computer or terminal, that provides data in the form of digital signals for transmission.
Glossary interface A shared boundary between functional units. ITU International Telecommunications Union. The telecommunications agency of the United Nations, established to provide standardized communications procedures and practices. Before March 1993 it was called CCITT. ITU-T The Telecommunications Standardization Sector of the International Telecommunications Union, an advisory committee established by the United Nations to recommend communications standards and policies.
COMSPHERE 3900 Series Modems NIM Network Interface Module. The interface provided for the public switched telephone network (PSTN). There are two NIMs per carrier. NMS Network Management System. A computer system used for monitoring and controlling network devices. nonlinear distortion VF line distortion which is usually associated with pulse-code modulation (PCM) compandor noise on the phone line. off-hook The state of a telephone or modem that is connected to the network.
Glossary Return to Dial A function available when in Dial Backup mode that allows the modem to switch to dial-line operation when currently on leased lines. RJ11 A type of 6-position jack normally used with permissive dial networks and telephone sets. RJ21 A type of 50-position jack normally used with permissive dial networks providing the appropriate conductors for up to eight telephone lines. SDCP Shared Diagnostic Control Panel.
COMSPHERE 3900 Series Modems V.22bis An ITU-T standard for modems operating full-duplex with asynchronous or synchronous data at 1200 or 2400 bps over the dial network (PSTN). V.25bis An ITU-T standard dialing protocol that permits direct and stored-number dialing in asynchronous, bisynchronous, or HDLC modes. V.27bis An ITU-T communications standard for modems operating in synchronous mode at 4800 or 2400 bps. V.
Index Blid Dial Pause, 5-26 Break Buffer Control, 5-44 Break Forces Escape, 5-21 Buffer Disconnect Delay, 5-45 buffer size, reduced asynchronous, 5-45 busy control, 7-5–7-7 Busy Tone Detect, 5-26 A Abort (test), 8-2–8-10 ac power requirements, 1-9 Access from Remote, 5-49 Active (Operating) configurations, 5-1 Active (Saved) configurations, 5-1 address, network management, 5-50, 6-2 alarms, DTE and VF, 5-19 analog loopback test, 8-4–8-10 answer access security, 12-2–12-4 answering a call auto-answer, 5-25
COMSPHERE 3900 Series Modems Dual Leased Line, 5-38 dual leased–line operation. See backup, leased D data compression, 5-40 MNP5, 5-40 V.42bis, 5-40 data rate dial line, 5-30 forced to VF rate, 5-18 leased line, 5-34 data rates. See rates DATAKIT, 5-16, 5-20 default configuration options, 2-6–2-8, 5-1, F-2–F-7 Diagnostic Connection, 5-51 diagnostic control panel (DCP) configurations.
Index I M Identity, 4-6 indicators definitions, 3-6 status (LEDs), 3-3–3-5 installation Model 3910, 2-2–2-12 Model 3911, 2-9–2-11 Make Busy, 7-5–7-7 Automatic, 5-28 NIM, 5-28 Via DTR, 5-29 manual dial.
COMSPHERE 3900 Series Modems P S part numbers, 4-6, H-1 passwords administrative, 12-5–12-6 remote access, 5-5–5-8, 5-49, 13-2, 13-3, 13-4, 13-5 security, 12-2–12-4, 12-16–12-17 pattern test, 8-7–8-10 pause time, for comma in dial string, 5-26 phone. See telephone, external phone numbers.
Index Test branch, 8-1–8-2 in menu structure, 3-8 Test configuration options group, 5-46–5-47 TMP default configurations. See default configuration options TMp Train Time, 5-37 TMp Transmit Preemphasis, 5-37 top-level menu messages, 3-8–3-14 train time TMp, 5-37 V.27bis, 5-37 V.32bis, 5-32 transmit level, dial line, 5-31 Trellis Multipoint (TMp), 3-9, 3-10, 3-14, 4-1, 4-5, 4-6, 7-9, 13-3 tributary modems identifying, 5-50 maximum number, 6-1 mixed firmware, 5-51 Troubleshooting, B-1–B-6 V.
COMSPHERE 3900 Series Modems Index-6 September 1998 3910-A2-GN32-40
