Digi International Inc.
The Digi logo is a registered trademark of Digi International Inc. ™ AccelePort , T1 Modem Bank™ and EPC/X™ are trademarks of Digi International Inc. All other brand and product names are the trademarks of their respective holders. © Digi International Inc. 1997 All Rights Reserved Information in this document is subject to change without notice and does not represent a commitment on the part of Digi International.
Table of Contents Regulatory Statements................................................................................................................................................. viii Federal Communications Commission (FCC) Statement .................................................................................... viii FCC Part 68............................................................................................................................................................
Software Installation for Novell Systems...............................................................................................................34 Introduction.....................................................................................................................................................34 Installing the EPC/X AIO Device Driver .......................................................................................................35 Installing the AIO Application...................
Physical Specifications..................................................................................................................................................79 T1 Modem Bank Power Cord Specifications.........................................................................................................79 T1 Modem Bank Environmental Requirements.....................................................................................................80 T1 Modem Bank Rack Specifications................
List of Figures Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8 Figure 9 Figure 10 Figure 11 Figure 12 Figure 13 Figure 14 Figure 15 Figure 16 Figure 17 Figure 18 Figure 19 Figure 20 Figure 21 Figure 22 Figure 23 Figure 24 Figure 25 Figure 26 Figure 27 Figure 28 Figure 29 Figure 30 Figure 31 Figure 32 Figure 33 Figure 34 Figure 35 Figure 36 vi T1 Modem Bank Chassis, Front View.......................................................................................................
List of Tables Table 1 Table 2 Table 3 Table 4 Table 5 Table 6 Table 7 Table 8 Table 9 Contents T1 Modem Bank Shipping Carton Contents..............................................................................................2 CSU Technical Description .......................................................................................................................4 Requirements for T1 Modem Bank Setup ................................................................................................
Regulatory Statements Federal Communications Commission (FCC) Statement Radio Frequency Interference (RFI) This equipment generates and uses radio frequency energy, and if not installed and used in strict accordance with manufacturer’s instructions, may cause interference to radio and television reception.
FCC Part 68 FCC Registration: 5TLUSA-23932-DD-N Ringer Equivalence Number: 0.0B This T1 Modem Bank complies with Part 68 of FCC Rules. On the back of the T1 Modem Bank is a label that includes the FCC Registration Number and Ringer Equivalence Number (REN) for this T1 Modem Bank. If requested, this information must be provided to the telephone company.
Industry Canada Compliance Statement This Class A digital apparatus meets the requirements of the Canadian Interference-Causing Equipment Regulations. It complies with CSA 22.2 No. 950 for safety, ICES 003 for EMC, and ICCS 003 for Telecom. Cet appareil numérique de la classe A respecte toutes les exigences du Règlement sur le matériel brouilleur du Canada. Cet appareil est conformément aux exigences de CSA 22.2 No. 950 pour la sécurité, ICES 003 pour EMC et ICCS pour les télécommunications.
AccelePort T1 Modem Bank Overview The Digi AccelePort T1 Modem Bank is a high speed Wide Area Network (WAN) interface for Windows NT and Novell environments. The T1 Modem Bank system is composed of two major parts: a host-installed Enhanced Performance Concentrator (EPC/X) adapter and a rack mountable or table top system cabinet. Figure 1 shows a front view of the T1 Modem Bank system cabinet.
Unpacking Table 1 documents typical shipment packaging contents of the T1 Modem Bank. The components should be checked in upon arrival; notify your salesperson if the order is incomplete. The T1 Modem Bank is shipped with proper shock insulation material. If the unit needs to be shipped, use the original shipping carton. If the original packaging is unavailable, contact Digi for replacement packaging.
Planning the T1 WAN Interface This section describes planning the T1 Modem Bank interface to the carrier facility. The configuration of the T1 Modem Bank must match the requirements of the T1 line specified by the carrier. Connections to the WAN Connection to the telephone carrier facility is handled from the line card, via a T1 line. Carrier Approval Contact your carrier for approval before beginning the actual installation.
Line Build Out After the T1 Modem Bank is installed, the carrier will determine the correct setting for Line Build Out (LBO). However, certain determinations based on the following information will need to be entered into your computer. • CSU mode Line compensation: Line attenuation can be set to one of the following: -0.0dB, -7.5dB, -15.0dB, and -22.5dB. Your T1 installer will inform you of the correct setting.
Parameters Specified to the Carrier Certain parameters are specified to the carrier when provisioning the T1 line. You will need to provide the following information to a T1 facility provider. • Individual Access Line Select the Phone service or Line Pooling Arrangement, which is sometimes termed Multi-Hunt Grouping. With Line Pooling, one phone number is assigned to a group of end terminals, and the first available terminal will receive the call. • B8ZS or AMI line code B8ZS is preferred.
Planning Worksheets The T1 Modem Bank must be configured to match the provisioning of the T1 line from the carrier.
T1 Modem Bank Worksheet Type Number or Checkmark (√) Description Circuit ID # __________________ This is a code assigned by your service provider, one per T1 line Lead phone number __________________ Master phone number or first phone in the sequence to receive a call.
Hardware Installation This section describes the following procedures: 1. T1 Modem Bank power supply installation/replacement 2. T1 Modem Bank standalone or rack installation 3. T1 Modem Bank daisy chaining 4. EPC/X host adapter installation 5. EPC/X host adapter connection to the T1 Modem Bank units. T1 Modem Bank Power Supply Installation/Replacement The T1 Modem Bank operates with either a single power supply installed or with two power supplies installed.
Figure 2 Power Supply • You can install a second power supply into a T1 Modem Bank that already has an existing power supply installed without having to power-down the T1 Modem Bank. • Wear a grounding strap while performing this procedure to prevent electrical discharge. • Avoid touching the fan during this procedure since the fan blade could cause harm.
T1 Modem Bank Standalone or Rack Installation You have the option of using the T1 Modem Bank in a standalone, table-top configuration or in a rack-mounted configuration. Directions for both configurations are provided in this section. 10 • Make sure the T1 Modem Bank is powered-down before you install it. • Do not block the sides of the T1 Modem Bank since this will impede airflow. • The T1 Modem Bank is shipped from the factory with four “feet” installed on the bottom of the unit.
Standalone Installation Procedure Tools needed: Phillips screwdriver; flat blade screwdriver 1. Place the T1 Modem Bank on a flat surface within 6’ 7” (2m) of a power outlet. 2. Attach the terminator plug to the connector labeled HOST OUT on the HOST IN/OUT and Terminal faceplate. See Figure 3. 3. Plug the power cord into an outlet. 5. Insert the RJ-45 plug on the T1 line cable into the jack marked T1 on the Line card faceplate. See Figure 3. 6.
Requirements for Rack Installations The T1 Modem Bank chassis is made to be inserted into a standard 19-inch or a 24-inch equipment rack. The T1 Modem Bank is shipped from the factory with two rack-mounting brackets (“ears”) installed for a 19-inch rack. If you wish to install a T1 Modem Bank into a 19-inch rack, go now to the instructions in “General Rack Installation Directions” on page 14.
3. Line up the circular holes in a bracket with the circular holes on a side of the T1 Modem Bank, and use two of the screws to fasten the bracket to the chassis. Do not use the oval slots on a bracket to connect the bracket to the T1 Modem Bank. Figure 5 4. Bracket Position For 24-inch Rack Follow “General Rack Installation Directions” on page 14 when you have installed two brackets to each T1 Modem Bank unit.
General Rack Installation Directions Figure 6 14 • When multiple units will be mounted in the rack, install a T1 Modem Bank unit in the first chassis slot at the bottom of the rack, then work upward. This prevents cables from becoming tangled, and it maintains the lowest possible center of gravity to prevent the rack from falling over. • Multiple T1 Modem Bank units within the confined space of a rack may cause higher operating temperatures.
1. Installing the T1 Modem Bank into the rack requires two people since the T1 Modem Bank is heavy. Note that handles are provided on the T1 Modem Bank to aid in rack installation. They are part of the chassis and are located on the front of the T1 Modem Bank near the outer edges of the chassis.
Daisy Chaining T1 Modem Bank Units The HOST OUT connector of each unit must be connected to the HOST IN connector of the next unit in the daisy chain. A terminator plug is then installed on the HOST OUT connector of the last unit in the daisy chain. See Figure 8.
Daisy Chain Example While setting up daisy chains, refer to the example shown in Figure 9 and the directions that follow.
• Do not connect wires to pins 12 or 13 in a standard daisy chain cable—serious damage could result. • Never use VGA extension cable or any other cable that has all 15 pins wired. • Do not use a standard DB15 video cable • To build a custom daisy chain cable, follow the wiring mode shown in Figure 33 on page 94 or Figure 34 on page 95. Alternatively, contact your Digi sales representative.
Daisy Chaining T1 Modem Bank Units and EPC/CON-16 Concentrators A T1 Modem Bank can be installed in an existing system comprised of EPC/CON-16 concentrators. See Figure 11. • Because existing EPC concentrators are assigned node numbers by the host each time the software is booted, any added T1 Modem Bank units must follow the EPC concentrators in the daisy chain. • The last T1 Modem Bank in a daisy chain must have a terminator plug installed on its HOST OUT port.
EPC/X Host Adapter Installation The Digi EPC/X host adapter is an intelligent dual-channel synchronous communication board which plugs into a slot in your computer’s bus. The adapter provides an interface between the computer and a single T1 Modem Bank or a series of daisy-chained T1 Modem Banks and/or EPC concentrators. Before installing your Digi EPC/X host adapter, be sure to write down its serial number.
ISA Host Adapters Setting the I/O Port Address The ISA EPC/X host adapter uses four bytes of address space on the host computer’s I/O bus. Before installing the host adapter, the board’s I/O port starting address must be set on DIP switch SW1 (located on the top of the board). To insure flexibility, seven I/O port address ranges are available: 108h-10Bh, 118h-11Bh, 128h-12Bh, 208h-20Bh, 228h-22Bh, 308h-30Bh and 328h-32Bh.
Factory-Set Jumper J1 There is one jumper, J1, on the host adapter. This jumper is set in the factory and must not be changed. Installing the ISA Host Adapter in your Computer 1. Turn off your computer’s power and remove the cover. Refer to your computer’s manual for instructions on cover removal and option board installation and cautions. 2. Locate an available 16-bit AT slot in your computer and remove the slot plate. 3.
EISA Host Adapters Factory-Set Jumpers There are three jumpers, J1-J3 on the EISA EPC/X host adapter. These are set in the factory, and must not be changed. Installing the EISA Host Adapter in your Computer 1. Turn off your computer and disconnect any attached peripheral devices. 2. Remove the cover from the computer. Refer to your system’s documentation for cover removal instructions and for other add-in board installation instructions and precautions. 3.
6. Place the cursor on “Dual-Ported Mem Address” and press .
Connecting the EPC/X Host Adapter to the T1 Modem Banks To locally connect the EPC/X Host Adapter to the T1 Modem Bank(s), connect the daisy chain cable from the EPC/X host adapter line connector to the HOST IN connector on the first T1 Modem Bank in the daisy chain. (See Figure 13.) At the T1 Modem Bank end, label the cable “to Host EPC.
To connect the EPC/X host adapter to the T1 Modem Bank(s) via modems, follow the example in Figure 14.
Software Installation and Configuration Setting the Node Number The EPC/X host adapter identifies T1 Modem Bank units and/or EPC concentrators by their node numbers, which are stored in non-volatile RAM (NVRAM). Each T1 Modem Bank and concentrator in a daisy chain must have a unique node number which must be set during installation. The node numbers must be assigned in ascending order with the lowest number assigned to the T1 Modem Bank or concentrator closest to the EPC/X host adapter.
Figure 16 T1 Modem Bank Display Panel Pressing the right push button will interrupt the power-on self test (POST) of a T1 Modem Bank and let you enter the configuration/diagnostic mode so that you can change the T1 Modem Bank’s node number. Press the left push button until your desired node number is displayed, then press the right push button to set the node number.
Installing Download Cycle the T1 Modem Bank’s power off, then on again to restart POST. After a brief pause, the lights on the display panel will flash, and the T1 Modem Bank will begin the POST sequence, which takes about 2 minutes to complete. Once the POST is completed, P1 will be shown on the display panel to indicate that the T1 Modem Bank is ready for download. (If P1 is not shown, go to the section “POST Failure” on page 30 for instructions.
POST Failure If the T1 Modem Bank does not pass POST, it will display an error message code on the seven-segment LED display and enter an infinite loop, waiting for the device to be reset. (Table 4 shows a list of the possible error message codes). Table 4 Error Message Codes Code Problem Description E0 Bad CPU Writing all 1s/all 0s test to all registers failed to read back OK. E1 Bad Watchdog The watchdog does not reset the board, even when it has not been hit for 1.
Possible Problem If at least one modem card is not inserted in the T1 Modem Bank unit, the line card will busy out the lines associated with that line card. Restarting POST Cycle the T1 Modem Bank’s power off, then on again to restart POST. Display Panel Status Indicators Once the POST is completed, P1 will be shown on the display panel to indicate that the T1 Modem Bank is ready for download.
Table 5 7 Segment Display Display Panel Status Codes Meaning Description AC Activity AC appears on the 7-segment display. The ten activity LEDs turn on sequentially from left to right. The speed of this “chase light” display increases with the overall activity level of the T1 Modem Bank. LU Line Utilization LU appears on the 7-segment display, and the ten LEDs become a bar graph indicating the percentage (0-100%) of the time the synchronous communications line is being used.
Table 5 7 Segment Display Meaning Description SE* Severely Errored Seconds A Severely Errored Second is a second with 320 or more CRC errors FS* Framing Bit Errors An error in the Framing Bits received from the network LF* Line Format Violations In AMI mode, any bipolar violation; in B8ZS mode, any invalid bipolar violation. A bipolar violation is an error in the encoding of binary 1’s and 0’s received from the network. Display channels This display designates channel variables.
Software Installation for Novell Systems Introduction Before software installation can proceed: • • • • • The EPC/X adapters must be installed in the computer. The T1 Modem Banks must be connected to the EPC/X host adapters. The T1 Modem Banks must be powered on. The T1 Modem Bank node numbers must be set. A T1 line must be connected to the T1 connector on the line card of each T1 Modem Bank. The driver will support up to four Digi EPC/X host adapters on ISA, EISA and PCI bus servers.
Installing the EPC/X AIO Device Driver See the AccelePort EPC/X device driver installation instructions in the Digi AccelePort Intelligent Serial Communications Products Novell AIO Device Driver Package Software Manual (manual part no. 92000243). This manual is included with the T1 Modem Bank package. Installing the AIO Application Follow the instructions in the Novell manuals to install NetWare Connect on the system to which the T1 Modem Banks are directly connected.
Configuring the T1 Modem Banks • The instructions for configuring and managing T1 Modem Banks with QuickManager are in “Configuring via QuickManager” on page 41. • Configuring the T1 Modem Banks with the DGT1CFG.NLM utility is described in this section. Although the DGT1CFG.NLM utility will configure the T1 Modem Banks, it can not perform management functions like advanced configuration, monitoring, and testing.
3. Press the ENTER key to configure that host adapter’s T1 Modem Banks. The “#” field in the example screen shown in Figure 18 indicates the number (beginning with 0) of the T1 Modem Bank you will be configuring. Figure 18 4. T1 Modem Bank Configuration Screen Use the arrow keys to select the field you wish to change, and press the ENTER key to view a list of the options that are available for that field.
Software Installation for Windows NT Systems Software installation and configuration for a Windows NT system involves the following steps: 1. Install and configure the EPC/X Windows NT device driver on the host system (the system to which the T1 Modem Banks are directly connected). 2. Optionally install the Windows NT SNMP (Simple Network Management Protocol) service on the host system.
Windows NT 4.0 1. Double click Control Panel. 2. Double click the Network icon. 3. When the “Network” window appears, select “Services”, then click the “Add” button. 4. Select “SNMP Service.” Installing RAS Windows NT Remote Access Service (RAS) includes the following applications: • Dial-Up Networking is the client version of RAS and is used to connect to dial-up servers. The Dial-Up Networking icon is located in the My Computer dialog box and in the Accessories folder on the Start menu.
To run the setup program, insert the setup disk (part no. 40001468) into the drive and run SETUP.EXE. Setup will perform the following steps: 1. Install local and remote management support files. 2. Install and run the ConfigWizard configuration utility. 3. Install and run the QuickManager management application. 4. Copy the SNMP MIBS (RFC1406, RFC1659 and DIGIT1E1. MIB). 5. Optionally install the Digi SNMP Proxy Agent.
T1 Modem Bank Configuration The T1 Modem Bank can be configured in the field for specific network needs by one of four methods: • QuickManager mode • DGT1CFG.NLM mode (used on Novell systems only). See “Configuring the T1 Modem Banks” on page 36 for instructions on using the DGT1CFG.NLM utility. • terminal port mode • display panel mode It is easier and less time-consuming to configure a T1 Modem Bank using QuickManager or DGT1CFG.NLM than to use the terminal port or the display panel.
Figure 19 42 Line Card Status Display T1 Modem Bank
Figure 20 shows an example screen when “Line Card” and “Options” are selected. Figure 20 Line Card Options Display Once the desired settings have been selected for a component, they must be applied to the T1 Modem Bank. Select “Apply” from the “Window” menu or click the “Apply” button.
Configuring via the Terminal Port To configure the T1 Modem Bank through the terminal port, follow these steps before starting up the T1 Modem Bank: 1. Make sure the T1 Modem Bank is shut off; then connect a terminal to the terminal port. Some terminals will not transmit data if their CTS (Clear To Send) line is LOW. These terminals must have their CTS line HIGH or floating to ensure that they will have no problems communicating with the T1 Modem Bank.
Configuring via the Display Panel Power up the T1 Modem Bank and press the right push button on the display panel soon after the adjacent lights flash. Repeated pressing of the right push button will cycle through the following sequence: (1) Node number selection (2) T1 line configuration (3) Diagnostic tests Pressing the left push button will allow you to change the parameter whose current value or setting is shown in the display panel.
The following describes the display panel configuration/diagnostic process: 1. Press Right Displays current node number Press Left changes node number 2. Press Right Line Card T1 Line Select Press Left selects Line Interface or Drop & Insert 3. Press Right goes to Diagnostic Test 1 (if no left press at Line Card T1 Line Select) 4. Press Right if Drop & Insert Press Left changes EQ 5. Press Right goes to Diagnostic Test 1 6.
Configuring via the Serial Port Interface The serial port on the T1 Modem bank can be used to display and modify the T1 configuration. It can also be used to display the installed equipment list, the modem on/off-hook status, and the alarm status. Thus there are 5 basic functions provided by the interface: 1. T1 interface configuration display and modification. 2. Alarm status display. 3. Modem signaling status display. 4. BIOS/NVRAM information 5.
The initial screen is shown below. ----------------------------------------------------------------------------Modem Bank Configuration ----------------------------------------------------------------------------Parameter | Possible values <>=selected []=active ----------------------------------------------------------------------------1) T1 Frame Fmt. | D4 | [ESF ] | | | 2) Line Coding | AMI | [B8ZS ] | | | 3) Jitter Attn. | [Transmit ] | Receive | Auto | None | 4) T1 Sig. Prot.
Configuration modification For each parameter, the currently active value will be shown in square brackets. Each modifiable parameter has a “selector” number associated with it and displayed on the left margin. For example, the parameter “Span Type” has the selector value 5. From this T1 configuration display, the user can modify any of the displayed parameters by typing in its associated number at the prompt. The user will then be prompted to input a new value for the parameter.
( The user stores the new configuration and makes it “active” by entering “s” ) : s ----------------------------------------------------------------------------Modem Bank Configuration ----------------------------------------------------------------------------Parameter | Possible values <>=selected []=active ----------------------------------------------------------------------------1) T1 Frame Fmt. | D4 | [ESF ] | | | 2) Line Coding | AMI | [B8ZS ] | | | 3) Jitter Attn.
Equipment List To see a display of installed components with their software and hardware revisions and status, the user types the command letter “e” at the command prompt. There are four component types that can be displayed: motherboard, line card, power supply and modem cards. The motherboard and linecard components each have an ID byte, a hardware revision and a software revision. There should only be one of each of these two components in a given modem bank.
System Information The user can choose to see a display of modem bank system information. An example of the system BIOS/NVRAM information screen is given below.
Modem Switchhook Status The user can choose to see a dynamically updated display of the modem switchhook status for each com port. The screen is updated once per second. A “spinner” will be visible on the left margin to provide a visible heartbeat indicating that updating is in progress. Once started, the display can be canceled by pressing any key. The display shows the status of all 24 channels, partitioned into four segments of six channels each. These segments correspond to the modem cards.
Alarm Status The user can choose to see a continuously updating display of the modem bank’s alarm and loopback status. As with the modem switchhook status display, the screen is updated once per second. Also, as with the Modem switchhook status display, “spinner” will be visible on the left margin to provide a visible heartbeat that indicates updating is in progress. Once started, the display can be canceled by pressing any key. The Received Alarm indication (RcvAlarm) can show one of four values: 1.
An example of the alarm and loopback status display when there are alarms is shown below. In this case no loopbacks are active. -------------------------------------------------Modem Bank Alarm Status -------------------------------------------------Hit any Key to Cancel Display RcvAlarm TxAlarm Signal Loopbacks -------------------------------------------------/ Red Yellow LOS None An example of the alarm and loopback status display when a payload loopback is in effect is shown below.
T1 Modem Bank Diagnostics The T1 Modem Bank features three methods of running its on-board diagnostic programs: • QuickManager mode • display panel mode The tests are selected and executed by pushing the buttons on the display panel and reading the results on the LED indicators • terminal port mode This mode permits running the diagnostics from a serial terminal using the V key from the debug terminal.
Running Diagnostics with QuickManager QuickManager is started by clicking the “Digi” program group, and then clicking the QuickManager icon. Clicking “Window” in the main menu will allow you to view the current configuration settings, change the configuration settings, or run a test on the selected component. (You can alternatively click the applicable button below the main menu). Figure 21 shows an example screen at the completion of testing Modem 1 of Modem Card 1.
Running Diagnostics from the Display Panel To run the internal diagnostic programs from the T1 Modem Bank’s front panel, turn the T1 Modem Bank on and wait for the POST (Power On Self Test) to complete. While P1 is displayed on the front panel, press either button on the display panel. The first thing you should see is the T1 Modem Bank’s node number. This will be displayed in the form xn, where x is the node number (1n, 2n, and so forth).
Running Diagnostics from the Terminal Port 1. To run the internal diagnostic programs from the terminal port, turn off the T1 Modem Bank and connect a terminal to the terminal port. Some terminals will not transmit data if their CTS (Clear To Send) line is LOW. These terminals must have their CTS line HIGH or floating to ensure that they will have no problems communicating with the T1 Modem Bank. Appendix C on page 91 shows a cable that can be used for these terminals. 2.
The results of the POST sequence are displayed, and the T1 Modem Bank begins listening for a ping packet from the EPC/X host adapter. While listening for a ping packet, the T1 Modem Bank cycles through various baud rates and clocking modes as it tries to link up with the EPC/X host adapter. The following messages will scroll continuously until you press ? to get the configuration/diagnostic menu: Listening mode ...no packet Listening mode ...no packet Listening mode ...no packet Listening mode ...
To run individual tests, enter the test number (1-9). To run all tests (except number 9), enter A. Tests run continuously. To stop a test, press any key during execution of the test. The current pass of the test will be completed, and control will be returned to the terminal. Pressing N allows you to change the T1 Modem Bank’s node number. Pressing L allows you to change the line card configuration. Pressing B reboots the T1 Modem Bank (similar to a power-on reset, but the diagnostic port remains active).
Diagnostic Test Descriptions Test 1: Front Panel Test This test activates the ten LED indicators and the two 7-segment displays in four different patterns at 1-second intervals: the first pattern lights the RD, CTS, DCD, RI and IFC LEDs plus the horizontal elements of both 7segment displays and the decimal point of the second 7-segment display; the second pattern lights all LEDs and display segments; the third pattern lights the TD, RTS, DSR, DTR and OFC LEDs plus the vertical elements of both 7-segment dis
Test 4: Line Card Test The line card test checks to make sure a line card is installed and working. To begin the test in front panel mode, press the left push-button while the number 4 is displayed in the 7-segment LED display. When run from the front panel, the pass number is shown on the 7-segment display. Errors are counted on the ten LEDs, and the test is repeated until the left push-button is pressed. The 7-segment display will then show P4 or F4 to indicate pass or fail status.
Test 7: Sync External Loopback Test This test places the high-speed synchronous channel in external loopback mode. In video mode, this test can be run with or without an external loopback cable. The external loopback test checks the internally clocked and self clocked transmission modes (0-2, 6-14, 27-29 and 60-74). (See Appendix B, beginning on page 89, for a list of the modes). Using Display Panel While 7 is shown on the 7-segment LED display, press the left push-button to begin the test.
Component Removal and Installation This section provides replacement instructions for various components. The line card, modem card, power supply, fan assembly, and fuse may be replaced by any on-site personnel of average skill. However, the ribbon cable, sync and terminal cable, and power inlet filter must be replaced at the factory. Table 6 lists the various components that may need to be replaced, the required skill level, and where more detail is provided.
Line Card Removal and Replacement These instructions are provided in the event that the line card needs to be replaced in the field due to equipment malfunction. If the line card is malfunctioning, a message number E6 will flash in the display panel window or the boot will not proceed past the D0 state. The T1 Modem Bank must be powered down before the line card is removed and replaced since the card does not have hot swap capabilities. Use the OFF/ON switch in the rear of the chassis.
The line card is located on the left as you face the front of the chassis. It is accessed from the front of the chassis. A power indicator LED and a T1 jack are part of the line card faceplate. Follow this procedure to replace the line card: 1. Label, then remove the T1 line. 2. There are two captive fasteners that secure the line card to the chassis. To remove the malfunctioning line card, use a flathead screwdriver to loosen the captive fasteners on the malfunctioning line card.
Modem Card Removal and Installation/Replacement Modem Card Removal Modem cards can be “hot swapped”, meaning that no system reset is needed after a modem card is pulled out and replaced with another modem card. This does not mean that modem boards should be moved from slot to slot without cause, since the motherboard senses and stores information regarding a modem board’s correct location. 68 • Do not remove a modem card for any reason when the activity LEDs labeled ONL1-ONL6 are lit.
Figure 23 Component Removal and Installation Modem Card 69
Modem cards are located on the front of the chassis between the line card (labeled T1 and PWR) and the sync and terminal connections (labeled HOST IN, HOST OUT and TERMINAL). Six on-line indicators and one power indicator are found on the modem card faceplate. Refer to Figure 1 on page 1 for an overall view of theT1 Modem Bank. Follow this procedure to replace a modem card: 1. Determine which modem card needs to be replaced.
Figure 24 2. Quick Manager Modem Revision Screen There are two captive fasteners that secure the modem card to the chassis. To remove the modem card, use a flathead screwdriver to loosen the captive fasteners on the malfunctioning modem card. Pull the ejector levers, then slide the malfunctioning modem card out of the chassis. Modem Card Installation/Replacement This section describes how to install an additional modem card or to replace a modem card that has been removed.
Perform the following steps to install a modem card: 1. Before installing an additional modem card into an empty slot, you must remove the faceplate covering the slot. Loosen the captive screws from the faceplate using a flathead screwdriver and lift off the faceplate. 2. To install the modem card in an empty modem slot, turn the modem card so the card edge faces the back plane and the LEDs face outward, toward the front of the chassis.
Power Supply Removal There are two ways to check a power supply failure: • Use QuickManager • Check the LED on the power supply’s printed circuit board. An unlit LED indicates that the power supply has failed. 1. • Wear a grounding strap while performing the following procedure to prevent electrical discharge. • Avoid touching the fan during the following procedure since the fan blade could cause harm. If dual power supplies are installed in the unit, determine which power supply is malfunctioning.
Figure 25 74 Power Supply T1 Modem Bank
Fan Assembly Removal and Replacement If the T1 Modem Bank overheats or exceeds its operating range, the fan is probably malfunctioning. If this is the case, follow the procedure below. Wear a grounding strap while performing these procedures to prevent electrical discharge. 1. Loosen the two captive screws on the display panel faceplate; carefully pull down the hinged display panel faceplate to access the fan assembly. 2. The fan assembly consists of a fan mounted on a card guide.
Fuse Replacement A defective fuse is indicated by a total loss of power to the system. The fuse is located at the rear of the unit behind the AC power inlet filter. A diagram of the AC power inlet filter is shown below. Figure 27 AC Power Inlet Wear a grounding strap during this procedure to prevent electrical discharge. Follow this procedure to replace a fuse: 1. Turn the T1 Modem Bank’s power switch at the rear of the unit to the OFF (O) position. 2.
Connections to the Telephone Network Figure 28 illustrates connections to the PSTN (Public Switched Telephone Network) using the T1 Modem Bank. With PSTN, a modem modulates serial data into voice-like signals for transmission. At the receiving end of a circuit, or connection, another modem demodulates the information, converting it back to serial data.
Alarms on a T1 Span Alarm Reason for Alarm Result of Alarm Red Alarm The T1 Modem Bank is not receiving a valid signal from the T1 Line. The T1 Modem Bank sends a “Yellow Alarm” down the T1 line, and it will not accept calls or dial out. Yellow Alarm The Central Office was in a Red Alarm state (i.e., it can’t hear you). The alarm goes away approximately 15 seconds after the Red Alarm clears itself. The T1 Modem Bank can not accept calls or dial out on the T1 line.
Physical Specifications T1 Modem Bank Power Cord Specifications The chassis has a 3-wire power cord. The free end of the 3-wire power cord connects to the 110 VAC (domestic) power source and protective ground. NEMA plug type 5/15P is used for US installations. The North American cordset is rated 15A/125V, and is UL/CSA approved. A T1 Modem Bank sold in North America is shipped with a standard power cord. Units sold outside of North America are shipped without a power cord.
T1 Modem Bank Environmental Requirements The T1 Modem Bank meets all functional requirements in this manual when operating in the environment listed below: Ambient Temperature 0° C to 40° C Relative Humidity 5% to 90%, non-condensing Altitude 0 to 12,000 feet T1 Modem Bank Rack Specifications The specifications listed below apply to both standalone units and rack-mounted units. Depth 13.0132inches Height 6.930 inches Weight 32 lb. fully loaded Width 17.
Daisy Chain Cables Daisy Chain cables have the following attributes: • Twisted pair, overall shield, 28 AWG • Capacitance 15.5 ±3 pF/ft. • Impedance 100 Ω/ft.
T1 Modem Bank Certification The T1 Modem Bank is certified to meet the following electromagnetic emissions and safety standards: Emissions: USA: FCC Part 15, Subpart J, Class A Canada: CSA C108.8-M83, Class A Cispr 22, Class A EN55022 Safety: USA: UL 1950 Canada: C22.2 No.
Glossary AMI (Alternate Mark Inversion) a line coding method for T1 spans. bandwidth the difference between the highest and lowest frequencies in a given range; the maximum datacarrying capacity of a circuit. (Greater bandwidth indicates higher speed data-transfer.) B8ZS (Binary 8-Zero Suppression) a line coding method for T1 spans channel an increment of bandwidth provided by the WAN. channel bank a voice time division multiplexer.
network a collection of links, nodes, and computers that provide connections between two or more defined points to facilitate telecommunication between them. off-hook the modem is in use, and the activity light is on. PCM (Pulse Code Modulation) the standard digital voice format, at 64K bps; POP (Point-of-Presence) the point within a local TELCO where the subscribers’ circuits for leased-line or long distance dialup circuits are terminated.
Appendix A — Memory Conflicts Contention for Memory Addresses Many intelligent peripheral devices require a block of vacant memory addresses on the host computer’s bus for their own use.
Figure 30 Typical PC Memory Usage - 1st Megabyte 1024K FFFFFh (1 Meg) System BIOS F0000h EFFFFh BIOS Extensions (EBIOS) EMM, LIM 4.
ISA Host Adapters The Digi ISA EPC/X host adapter has 1 megabyte of on-board dual-ported RAM which is accessed through a 32K “window”, which can be mapped into any 32K region in the computer’s memory address space (32K byte boundaries end with either 0000h or 8000h). The dual-ported RAM can also be mapped in its entirety into the host computer’s memory address space on any 1 megabyte boundary below 16MB—this option will be supported in some future device driver software releases.
EISA Host Adapters The Digi EISA EPC/X host adapter has 1 megabyte of on-board dual-ported RAM which is accessed through a 32K “window”, which can be mapped into any 32K region in the computer’s memory address space up to the 4 gigabyte limit.
Appendix B — Transmission Modes The EPC/X host adapter and the T1 Modem Bank transmit synchronous data in one of 75 modes. These modes are numbered 0 - 74, and each corresponds to a specific combination of wiring mode (4-Wire or 8-Wire), clocking method (internal, external or self-clocking) and baud rate.
4-Wire, Self Clocked 90 Mode# Mode Baud Rate Mode# Mode Baud Rate 1 2 60 61 62 63 NRZI FM NRZI FM NRZI FM 230K 460K 115K 115K 230K 230K 64 65 66 67 68 69 NRZI FM NRZI FM NRZI FM 460K 460K 921K 921K 1843K 1843K T1 Modem Bank
Appendix C — Terminal Port Cable Some terminals will not transmit data if their CTS (Clear To Send) line is LOW. These terminals must have their CTS line HIGH or floating to ensure that they will have no problems communicating with the T1 Modem Bank. The cable shown in Figure 31 can be used if a terminal of this kind does not require hardware handshaking.
Appendix D — Specifications and Wiring Pin Diagrams Line Card Connector Figure 32 illustrates an RJ-45 plug that can be inserted into the T1 line card connector. Figure 32 RJ-45 Plug The following are pin assignments for the T1 line interface and the DSX-1 line interface. Signal Pin RxTIP 1 RxRING 2 NC 3 TxTIP 4 TxRING 5 NC 6 NC 7 NC 8 Specifications: Cable: Standard: UL or ETL verified to Category 5 specifications.
Connector for Sync Channels The following is a pin out of the serial channel of SCA and sync link input Signal Pin Signal Pin TxD+ 1 TxD- 2 RTS+ 3 RTS- 8 TxC- 4 TxC+ 5 RxD- 6 RxD+ 7 RxC- 9 RxC+ 10 CTS- 14 CTS+ 15 GND 12 reserved 11 Terminal Port The following pin connections are used for the terminal port. This port is located on the HOST IN/OUT and Terminal faceplate.
Appendix E — Generic T1 Modem Bank Wiring Modes There are three basic wiring modes for connecting T1 Modem Bank units to an EPC/X host adapter or to each other: Eight-Wire Direct, Four-Wire Direct (also called Four-Wire Self-Clocking), and Eight-Wire Synchronous Modem (or Eight-Wire Externally Clocked). Eight-Wire Direct Wiring Eight-Wire Direct is the standard method for connecting T1 Modem Bank units to EPC/X host adapter synchronous lines and to other T1 Modem Bank units.
Four-Wire Direct Wiring Four-Wire Direct wiring connects T1 Modem Bank units where longer synchronous cable runs are necessary. While not as fast as Eight-Wire connections (the maximum data transfer rate is 1.8 megabaud1), this wiring method is more economical, and is sufficient in all but the most demanding high-performance applications. This means that terminal users should see no degradation in performance.
Restrictions on Daisy Chain Cable Lengths The maximum length of a daisy chain is dependent upon the synchronous data rate. Table 8 lists the maximum cumulative daisy chain cable lengths for various baud rates. For example, to run a synchronous line at 10 megabaud, the total length of all daisy chain cables for that synchronous line may not exceed 30 feet.
Eight-Wire Synchronous Modem Wiring Eight-Wire Synchronous Modem wiring allows T1 Modem Bank units to be installed in remote locations and connected to the EPC/X host adapter via RS-232 or RS-422 synchronous modems. The EPC/X host adapter and the T1 Modem Bank have been designed so that the synchronous ports can support either RS-422 or RS-232 line levels. To connect EPC/X host adapters and T1 Modem Banks to RS-232 synchronous modems, use the special cables shown in Figure 35.
RS-422 synchronous modems can also be used with the EPC system. The required cables are shown in Figure 36. Figure 36 RS-422 Synchronous Modem Cables The RS-422 Synchronous Modem cables are twisted pair cables, each having an HD-15 (high-density DB-15) connector at one end and a DB-37 connector at the other end. The cable should be shielded, and the shield must be connected as shown in the above diagram.
Appendix F — Modem AT Command Set Default values of command parameters, if applicable, are indicated by an asterisk (*). Basic AT Commands A/ Repeat Last Command Repeats execution of the previous command string. “A/” must not be preceded with AT, or followed by pressing . A Answer Causes the modem to go off-hook and attempt to establish a connection, even in the absence of a ring.
Dn Dial Command Initiates the dialing sequence. The string n includes the dial modifiers and the telephone number to be dialed. Dial Modifiers: En P: Pulse dial. Only digits 0-9 may be used in pulse dial mode. R: Reverse dial mode. Originates call in answer mode. S=n: Dial stored number. Dials the number stored in location n (0-3). T Tone DTMF dial. Any digit 0-9, *, #, A, B, C, D may be dialed as a tone. W Wait for dial tone. The modem waits for dialtone before dialing. , Pause.
In Modem Identification Causes modem to provide information about itself. I0: Returns product code (for example, “Digi International Modem/Xem”). I1: Returns 3-digit checksum of ROM. I2: Checks ROM by calculating and verifying checksum. Returns “ROM IS OK” or “ERROR”. I3: Returns type of ROM (for example, “ROM 27C010”). I4: Returns modem capabilities: “007040C0040000” Result Codes: Ln OK Returned when n = 0, 1, 2, 3 or 4. ERROR Returned for any other value of n.
Nn Select Negotiate Handshake Controls automode enable/disable. N0: When originating or answering, handshake only at the communication rate specified by register S37 and command Bn, with no fallback. * N1: When originating or answering, start handshake at the communication standard specified by register S37 and command Bn. During handshake, fallback to lower speed may occur except in \N1 mode. Result Codes: On OK Returned when n = 0 or 1. ERROR Returned for any other value of n.
Sn? Read S Register n Reports the value of S register n as a 3-digit decimal number. n=0-99 T Enable Tone dialing Instructs the modem to use DTMF tones when dialing. Dialed digits will be tone dialed until a P command or dial modifier is received. Tone dial is the default setting. Vn Result Code Format Controls whether result codes are returned to the DTE. V0: Numeric form (0 for OK). * V1: Verbose form (OK for OK). Result Codes: Wn OK Returned when n = 0 or 1.
Yn Dummy Command Dummy command for compatibility. Y0: Returns OK. Y1: Returns OK. Zn Recall Stored Profile Forces the modem to go on-hook and restore the selected profile. Non-storable parameters are returned to their factory settings. Z0: Reset and recall user profile 0. Z1: Reset and recall user profile 1. Result Codes: 104 OK Returned when n = 0 or 1. ERROR Returned for any other value of n.
AT& (Ampersand) Commands &Bn Autoretrain Defines modem action when it receives a poor signal. * &B0: Hang up on a poor received signal. &B1: Retrain on a poor received signal. Hang up if condition persists longer than the threshold set in register S7. &B2: Do not hang up; do not retrain (tolerate any connection). Result Codes: &Cn OK Returned when n = 0, 1 or 2. ERROR Returned for any other value of n.
&Gn Guard Tone Operation Determines which guard tone, if any, to transmit while transmitting in the high band (answer mode). Used only in V.22 and V.22bis mode. * &G0: No guard tones. &G1: 550 Hz guard tone. &G2: 1800 Hz guard tone. Result Codes: &Jn OK Returned when n = 0, 1 or 2. ERROR Returned for any other value of n. Dummy Command for AutoSync Dummy command for AutoSync compatibility. &Kn &J0: Returns OK. &J1: Returns OK.
&Mn Select Sync, Async or AutoSync Mode Options Selects the communication mode. * &M0: Async mode. &M1: Sync mode 1. Async off-line and Sync on-line. To switch to on-line command mode, select &D1 and drop DTR. &M2: Sync mode 2. Autodial stored #0 when DTR changes from off to on, ignore &D option, always &D2 when DTR changes from off to on. &M3: Sync mode 3. Manual dial mode with talk/data switch, same as &M2 when in on-line mode. &M4: Hayes AutoSync mode.
&Sn Data Set Ready Option Controls the functions of DSR. DSR indicates when the modem is connected to a communications channel and is ready. Async mode only. If the modem is in Sync mode, DSR is on during handshake and when online. DSR is off in test or idle mode. * &S0: DSR always on. &S1: DSR on during handshake and when on-line; off in test or idle modes. Result Codes: &Tn OK Returned when n = 0 or 1. ERROR Returned for any other value of n.
&Vn View Active Configuration and Stored Profile Displays the active and stored profiles (commands and S register settings), and any stored telephone numbers. The following example illustrates typical &V information for the Digi Modem/Xem. &V0: View active file, stored profile #0, and stored phone numbers. &V1: View active file, stored profile #1, and stored phone numbers.
&Xn Sync Transmit Clock Source Determines how the DTE transmit clock is generated while the modem is in synchronous modes. * &X0: The modem generates the transmit clock and applies it to pin 15 (EIA-232). &X1: The DTE generates the transmit clock on pin 25 (EIA-232) and the modem applies it to pin 15 (EIA-232) &X2: The modem derives the transmit clock from the receive carrier signal and applies it to pin 15 (EIA-232). Result Codes: &Yn OK Returned when n = 0, 1 or 2.
AT% (Percent) Commands %An Set Autoreliable Fallback Character Allows the user to specify the character that tells the modem to return (or fall back) from autoreliable (MNP) mode to a normal connection on the answering modem. Result Codes: OK Returned when n = 0-127 (ascii character set). ERROR Returned for any other value of n. Default: 0x0D %Cn Data Compression Controls the MNP Class 5 compression. The modem can only perform data compression on an error corrected link. * %C0: No compression.
AT\ (Backslash) Commands \An Block Size for V.42 Sets the maximum block size during connection. This option forces the modem chip set to transmit smaller blocks of data. The command is typically used for poor quality telephone lines where transmitting smaller blocks reduces retransmission and improves throughput. * \A0: Max 64 characters. \A1: Max 128 characters. \A2: Max 192 characters. \A3: Max 256 characters. Result Codes: \Bn OK Returned when n = 0, 1, 2 or 3.
\Jn Constant DTE Speed Option * \J0: DCE and DTE rates are independent. \J1: DTE rate adjusts to DCE connection rate after online. Result Codes: \Kn OK Returned when n = 0 or 1. ERROR Returned for any other value of n. Set Break Control Selects the way in which the modem handles a break signal. The Modem Xem can handle a break in one of three ways: expedited destructive, expedited, or queued break. In online data mode with V.
\Nn Modem Protocol Options Selects the type of data connection the modem can establish. * \N0: Normal mode. No protocol, but flow control is allowed. \N1: Direct mode. No protocol and no flow control is allowed. \N2: MNP reliable mode. \N3: LAPM, MNP or Normal mode \N4: LAPM or MNP mode. Result Codes: \Qn OK Returned when n = 0, 1, 2, 3 or 4. ERROR Returned for any other value of n.
\Xn Set XON/XOFF Passthrough Option Valid only if XON/XOFF flow control is enabled, such as with \G1 or \Q1; otherwise, XON/XOFF will not be detected by the modem, and thus will always pass through. * \X0: Process XON/XOFF per \G and \Q options; do not pass XON/XOFF to the remote modem or local DTE. \X1: Process XON/XOFF per \G and \Q options; always pass XON/XOFF to the remote modem or local DTE. Result Codes: Appendix F OK Returned when n = 0 or 1. ERROR Returned for any other value of n.
AT- (Dash) Commands -Jn Set V.42 Detection Phase Defines whether the originating modem sends a sequence to the answering modem to determine the type of error correction it has enabled. * -J0: Disables the V.42 detection phase. -J1: Enables the V.42 detection phase. Result Codes: 116 OK Returned when n = 0 or 1. ERROR Returned for any other value of n.
AT" (Quote) Commands "Hn V.42bis Compression Control Controls V.42bis data compression over an error correction link. * "H0: Disable V.42bis. "H1: Enable V.42bis only when transmitting data. "H2: Enable V.42bis only when receiving data. "H3: Enable V.42bis for both directions. Result Codes: "Nn OK Returned when n = 0, 1, 2 or 3. ERROR Returned for any other value of n. V.42bis Dictionary Size 512 bytes < btlz_dict_size < maximum RAM allows, default is 1.5 Kbytes. "N0: 512 bytes.
Class 1 FAX Commands The Digi Modem/Xem supports FAX commands conforming to EIA standard 578. These commands are given here with short descriptions; complete descriptions are given in the standard, available from the Electronic Industry Association. It also supports ECM mode and V.17terbo at 19.2K bps. +FCLASS? Service Class Indication Causes the modem to display the current setting. The modem can operate either as a Class 0 data modem or a Class 1 FAX modem.
Table 9 Supported FAX Transmit/Receive Modulations n +FRM=? Modulation Speed (Bits/Second) 3 V.21 ch. 2 300 24 V.27terbo 2400 48 V.27terbo 4800 72 V.29 7200 73 V.17LT 7200 74 V.17ST 7200 92 V.17terbo 192 LT 19200 93 V.17terbo 192 ST 19200 96 V.29 9600 97 V.17LT 9600 98 V.17ST 9600 121 V.17LT 12000 122 V.17ST 12000 145 V.17LT 14400 146 V.
Class 2 FAX Commands +FAA=n FAX Auto Answer Enable Command Syntax: +FAA= 0: 1: +FAXERR Answer as FAX modem of type specified by +FCLASS. Automatically determine whether to answer as FAX or data modem. T.30 Session Error Report Command syntax: +FAXERR Response syntax: +FAXERRR= 0-9 Call placement and termination. 0: Normal and proper end of connection. 1: Ring detected without successful handshake. 2: Call aborted, from +FK or 10-19 Transmit Phase A & miscellaneous errors.
+FBOR Data Bit Order Selection. Command syntax: +FBOR= 0: 1: 2: 3: Direct bit order for both Phase C data and Phase B/D data. Reversed bit order for Phase C data and direct bit order for Phase B/D data. Direct bit order for Phase C data and reversed bit order for Phase B/D data. Reversed bit order for both Phase C data and for Phase B/D data.
+FDCC FAX Capability Parameters Command syntax: +FDCC=VR,BR,WD,LN,DF,EC,BF,ST Response syntax: VR,RB,WD,LN,DF,EC,BF,ST Valid Values: VR: 0: 1: Vertical resolution Normal, 98 lpi Fine, 196 lpi 0: 1: 2: 3: 4: 5: Bit rate 2400 bps V.27ter 4800 bps V.27ter 7200 bps V.29 or V.17 9600 bps V.29 or V.17 12000 bps V.33 or V.17 14400 bps V.33 or V.
+FDCS Current Session Results. Command syntax: +FDCS? Response syntax: VR,BR,WD,LN,DF,EC,BF,ST Valid Values: VR: 0: 1: Vertical resolution Normal, 98 lpi Fine, 196 lpi 0: 1: 2: 3: 4: 5: Bit rate. 2400 bps V.27ter 4800 bps V.27ter 7200 bps V.29 or V.17 9600 bps V.29 or V.17 12000 bps V.33 or V.17 14400 bps V.33 or V.
+FDFFC Data Compression Format Conversion Command syntax: +FDFFC= 0: +FDIS Disable mismatch checking. The DTE must check the +FDCS:DF subparameter, and transfer matching data. Current Session Parameters. Command syntax: +FDIS=VR,BR,WD,LN,DF,EC,BF,ST Response syntax: VR,BR,WD,LN,DF,EC,BF,ST Valid Values: VR: 0: 1: Vertical resolution Normal, 98 lpi Fine, 196 lpi 0: 1: 2: 3: 4: 5: Bit rate 2400 bps V.27ter 4800 bps V.27ter 7200 bps V.29 or V.17 9600 bps V.29 or V.17 12000 bps V.33 or V.
+FDR Begin or continue Phase C Receive Data. Command syntax: +FDR This command will initiate a transition to Phase C data reception. +FDT Begin Phase C Data Transmission. Command syntax: +FDT This command prefixes Phase C data transmission. +FECM Error Correction Mode Control. Command syntax: +FECM= 0: Error correcting mode disabled. +FET Transmit Page Punctuation. Command syntax: +FET= 0: [PPS-]MPS Another page next, same document. 1: [PPS-]EOM Another document next.
+FMFR Manufacturer’s Identification. Command syntax: +FMFR? Response value: The information text cannot exceed 2048 characters. This command causes the modem to send one or more lines of information text which is used to identify the manufacturer. +FREV Request Product Revision Identification. Command syntax: +FREV? Response value: The information text cannot exceed 2048 characters.
Class 2 FAX Responses +FCFR Indicate Confirmation to Receive. Syntax: +FCFR Usage: Indicates the reception of an acceptable TCF training burst and valid DCS signal from the remote machine. +FCON Facsimile Connection Response. Syntax: +FCON Usage: Indicates connection with a FAX machine. Generated in response to an originate command or answer command. +FCSI Reports the Remote ID. Syntax: +FCSI:”” Usage: Reports the Called Station’s ID. +FDCS Reports DCS Frame Information.
S Registers All bit-mapped registers are read-only. The appropriate AT command which controls the relevant bits in the S register should be used to change the value. The factory default values are stored in ROM and are loaded into the active configuration at powerup or by the ATZn command. In addition, the designated default profile can be changed by entering the &Yn command where n is one of the two possible user profiles.
S Register Definitions S0 Autoanswer Ring Count Sets the number of the rings required before the modem automatically answers a call. Setting this register to zero disables autoanswer mode. Range: 0-255 Default: 000 Units: rings S1 Ring Count The value of S1 is incremented with each ring. If no rings occur over an 8 second interval, this register is cleared.
S6 Wait Before Dialing Sets the length of time, in seconds, that the modem must wait (pause) after going off-hook before dialing the first digit of the telephone number. The modem always pauses for a minimum of 2 s, even if the value of S6 is less than 2 s. The wait for dial tone call progress feature (W dial modifier in the dial string) will override the value in register S6. This operation, however, may be affected by some ATX options according to country restrictions.
S12 Guard Time Defines the maximum period, in 2-hundredths of a second, allowed between consecutive asynchronous escape characters (+) for the escape sequence to be considered valid. Range: 0-255 Default: 050 (1 s) Units: 0.02 s S14 Bit-Mapped Options Indicates the status of command options. Default: (AAh), (170d), (10101010b) Bit 0 Reserved.
S16 Bit-Mapped Option Status Indicates the test in progress status.
S18 Modem Test Timer Sets the length of time, in seconds, that the modem conducts a test (commanded by &Tn) before returning to the command mode. If this register value is zero, the test will not automatically terminate; the test must be terminated from the command mode by issuing an &T0 or H command.
S21 Bit-Mapped Options Indicates the status of command options. Default: (30h), (048d), (00110000b) Bit 0 Reserved.
S22 Bit-Mapped Options Indicates the status of command options.
S23 Bit-Mapped Options Indicates the status of command options. Default: (001), (015d), (00001111b) Bit 0 0 1 Grant RDL &T5 is selected &T4 is selected Bit 3, 2, 1 Reserved Bit 5, 4 Word length (7 bits) 00 01 10 11 even parity space parity odd parity mark parity Bit 7, 6 Guard tones (&Gn) 00 01 10 11 disabled 550 Hz 1800 Hz not used S25 DTR Debounce time Sets the length of time that the modem will ignore DTR for before hanging up.
S27 Bit-Mapped Option Indicates the status of command options.
S37 Desired DCE Speed Default = 000 0 = Attempt to connect at the last AT speed 3 = Attempt a 300 bits/s connection 5 = Attempt a 1200 bits/s connection 6 = Attempt a 2400 bits/s connection 7 = Attempt a 4800 bits/s connection 8 = Attempt a 7200 bits/s connection 9 = Attempt a 9600 bits/s connection 10 = Attempt a 12000 bits/s connection 11 = Attempt a 14400 bits/s connection 12 = Attempt a 16800 bits/s connection 13 = Attempt a 19200 bits/s connection 14 = Attempt a 21600 bits/s connection 15 = Attempt a 2
S44 Bit-Mapped Option Status Default = (17h) (023d) (00010111b) Bit 0 0 1 V.42bis status disabled enabled Bit 1-2 V.42bis selection ("Hn) 00 01 10 11 "H0 is selected "H is selected "H2 is selected "H3 selected Bit 3 Reserved Bit 4 Auto fallback/fall forward selection (%Gn) 0 1 %G0 is selected %G1 is selected Bit 5-7 Reserved S46 Automatic Sleep Timer 0-255 Sleep delay - unit = 100 ms Specifies the time the controller waits before going to sleep. The data pump is not affected. 0-254 = 0-25.
S51 Data/FAX DTE Flow Control Selection Default = 003 Bit 0-2 (&Kn, \Qn) 000 001 010 011 &K0, \Q0 are selected &K1, \Q1 are selected &K2, \Q2 are selected &K3, \Q3 are selected Bit 3 Reserved Bit 4 XON/XOFF flow control (\Gn) 0 1 Bit 5 0 1 \G0 is selected \G1 is selected DTE/DCE rate (\Jn) \J0 is selected \J1 is selected Bit 6, 7 XON/XOFF pass-through control (\Xn) 00 \X0 is selected 01 \X1 is selected S52 Break Control Option Reflects the &Kn value.
S58 BTLZ String Length Default = 032 Range: 6-64 bytes S59 Bit-Mapped MNP Options Default = 001 Bit 0 MNP5 status (%Cn) 0 1 %C0 is selected %C1 is selected S62 DTE Rate Status Default = 018 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 300 bits/s 600 bits/s 1200 bits/s 2400 bits/s 4800 bits/s 7200 bits/s 9600 bits/s 12000 bits/s 14400 bits/s 16800 bits/s 19200 bits/s 21600 bits/s 24000 bits/s 26400 bits/s 28800 bits/s 31200 bits/s 33600 bits/s 38400 bits/s 57600 bits/s 115200 bits/s S65 Round Trip
S72 DTE Speed Select During Data Transfer Default = 000 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 142 last autobaud speed 300 bits/s 600 bits/s 1200 bits/s 2400 bits/s 4800 bits/s 7200 bits/s 9600 bits/s 12000 bits/s 14400 bits/s 16800 bits/s 19200 bits/s 21600 bits/s 24000 bits/s 26400 bits/s 28800 bits/s 31200 bits/s 33600 bits/s 38400 bits/s 57600 bits/s 115200 bits/s T1 Modem Bank
Result Codes The modem connect message is controlled by ATQ, ATV, ATW, ATX, and AT\V. Display Format Options If ATQ1 is selected, there will be no connect message at all. The following description is true only if ATQ0 is selected. If ATX0 is selected, “CONNECT” or “1” will be used for all DTE and DCE speed regardless of ATW and AT\V options. The following description is true only if ATX0 is NOT selected.
Extended Message Options AT\V1 affects only ATW0 and ATW2 commands. If ATW0, ATV1, and AT\V0 are selected and the DTE rate is 57600 bits/s, then “CONNECT 57600” will be displayed regardless of protocol. If ATW0, ATV1, and AT\V1, are selected and the DTE rate is 57600 bits/s, then: a. “CONNECT 57600/NONE” will be displayed for V.14 connection b. “CONNECT 57600/MNP” will be displayed for MNP connection c.
2 RING The modem sends this result code when incoming ringing is detected on the line. 3 NO CARRIER The modem sends this result code when attempting to establish a call if: 1. Ringback is detected and later ceases but no carrier is detected within the period of time determined by register S7, or 2. No ringback is detected within the period of time determined by register S7. This result code is also used when the modem autodisconnects due to loss of carrier.
Negotiation Progress Messages 40 CARRIER 300 The modem returns this result code when either a V.21 or Bell 103 carrier has been detected on the line, and carrier reporting has been enabled. (See W1.) 42 CARRIER 75/1200 The modem sends this result code when the V.23 backward channel carrier has been detected on the line, and carrier reporting has been enabled. (See X4.) 43 CARRIER 1200/75 The modem sends this result code when the V.
56 CARRIER 24000 The modem sends this result code when the channel carrier in V.34 mode has been detected on the line, and carrier reporting has been enabled. 57 CARRIER 26400 The modem sends this result code when the channel carrier in V.34 mode has been detected on the line, and carrier reporting has been enabled. 58 CARRIER 28800 The modem sends this result code when the channel carrier in V.34 mode has been detected on the line, and carrier reporting has been enabled.
83 PROTOCOL: MNP 2, 4 This message is sent to the DTE when the modem has connected in the MNP mode of error correction, and PROTOCOL message reporting has been enabled. 84 PROTOCOL: MNP 3, 4 This message is sent to the DTE when the modem has connected in the MNP mode of error correction, and PROTOCOL message reporting has been enabled.
Index AT Command Set, 99 Cables Terminal Port, 91 Clear To Send, 44 Configuration EPC/X Host Adapter, 20 Line Card, 58, 61 T1 Modem Bank, 41 Contention Memory addresses, 85 CTS.
150 T1 Modem Bank
