Digi 90031300 manuale d’uso

Part No: 90031300 Rev C Digi International Inc. AccelePort T1 Modem Bank Installation and Configuration Guide[...]

The Digi logo is a registered trademark of Digi International Inc. AccelePort ™ , T1 Modem Bank ™ and EPC/X ™ are tradem arks 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[...]

Contents iii Table of Contents Regulatory Statements ................................................................................................................................................. viii Federal Communications Commission (FCC) Statement .............................................................................. ...... viii FCC P[...]

iv T1 Modem Bank Software Installation for Novell Systems...............................................................................................................34 Introduction ..................................................................................................................................................... 34 Installing th[...]

Contents v Physical Specifications .................................................................................................................................................. 79 T1 Modem Bank Power Cord Specifications .........................................................................................................79 T1 Modem Bank Env[...]

vi T1 Modem Bank List of Figures Figure 1 T1 Modem Bank Chassis, Front View.......................................................................................................1 Figure 2 Power Supply ............................................................................................................................................. 9 Figu[...]

Contents vii List of Tables Table 1 T1 Modem Bank Shipping Carton Contents..............................................................................................2 Table 2 CSU Technical Description .......................................................................................................................4 Table 3 Requirements for [...]

viii T1 Modem Bank 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. This equipm ent has b[...]

Regulatory Statements ix 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 provi[...]

x T1 Modem Bank Industry Canada Compliance Statement This Class A digital apparatus meets the requirem ents 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 ma[...]

Overview 1 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 [...]

T1 Modem Bank 2 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 orig[...]

Planning the T1 Interface 3 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, [...]

T1 Modem Bank 4 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, -7.5[...]

Planning the T1 Interface 5 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 some times termed Multi-Hunt Groupi[...]

T1 Modem Bank 6 Planning Worksheets The T1 Modem Bank must be configured to match the provisioning of the T1 line from the carrier. General Information Required information includes the following: • The identity of the WAN manager for your local and remote sites • The identification of the TELCO providing the WAN Table 3 Requirements for T1 Mod[...]

Planning the T1 Interface 7 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. Span Type ________ ________ Long Haul Short Haul[...]

T1 Modem Bank 8 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 Inst[...]

Hardware Installation 9 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 [...]

T1 Modem Bank 10 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. • Make sure the T1 Modem Bank is powered-down before you install it. • Do not block the sides [...]

Hardware Installation 11 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 in[...]

T1 Modem Bank 12 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-m ounting 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[...]

Hardware Installation 13 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 Bracket Position For 24-inch Rack 4. Follow “General Rack Installat[...]

T1 Modem Bank 14 General Rack Installation Directions • When multiple units will be m ounted 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 m aintains the lowest possible center of gravity to prevent the rack from falling over. •[...]

Hardware Installation 15 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. As one person holds the chas[...]

T1 Modem Bank 16 Daisy Chaining T1 Modem Bank Units The HOST OUT connector of each unit m ust 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. Figure 8 Synchronous Ports and Terminal Port[...]

Hardware Installation 17 Daisy Chain Example While setting up daisy chains, refer to the example shown in Figure 9 and the directions that follow. Figure 9 Two Daisy Chains of T1 Modem Banks to be Connected Locally TM TM TM TM TM TM TM 7 HUPLQDWRU SOXJ LQVWDOOHG RQ +RVW 2XW SRUW 7 HUPLQDW RU SOXJ LQVWDOOH G RQ +RV W 2XW SRUW 6WDQG DUG GDL V FKDLQ [...]

T1 Modem Bank 18 • 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 [...]

Hardware Installation 19 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[...]

T1 Modem Bank 20 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 i[...]

Hardware Installation 21 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 m ust be set on DIP switch SW1 (located on the top of the board). To insure flexibility, seven I/O port addr[...]

T1 Modem Bank 22 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 com puter’s manual for instructions on cover removal and option board installation [...]

Hardware Installation 23 EISA Host Adapters Factory-Set Jumpers There are three jum pers, 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. Refe[...]

T1 Modem Bank 24 6. Place the cursor on “ Dual-Ported Mem Address ” and press <Enter>. A screen similar to the following will appear: The following address choices are available: Below 1 Megabyte: * 80000h 88000h 90000h 98000h A0000h A8000h B0000h B8000h C0000h C8000h D0000h D8000h E0000h E8000h F0000h F8000h Above 1 Megabyte: F0000000h F[...]

Hardware Installation 25 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 cabl[...]

T1 Modem Bank 26 To connect the EPC/X host adapter to the T1 Modem Bank(s) via modems, follow the example in Figure 14. Figure 14 Local and Remote T1 Modem Bank Units TM TM TM TM TM TM TM /LQH  /LQH  (3&; +RVW $G DSWHU 6QFKUR QRXV 0RGH PV 6QFKURQRX V PRGHP FD EOH KRVW D GDSW HU WR PRGHP To connect the EPC/X host adapter to a sy[...]

Software Installation 27 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 num bers, 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 ins[...]

T1 Modem Bank 28 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 num ber. Press the left push button until your desired node number is displayed, then press the ri[...]

Software Installation 29 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 com plete. Once the POST is completed, P1 will be shown on the display panel to indicat[...]

T1 Modem Bank 30 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 m essage codes). Table 4 Error Message Codes Code Problem Description E0 Bad CPU Writing all 1s/all [...]

Software Installation 31 Possible Problem If at least one m odem 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 t[...]

T1 Modem Bank 32 Table 5 Display Panel Status Codes 7 Segment Display 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-[...]

Software Installation 33 Table 5 (continued) 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 bipol[...]

T1 Modem Bank 34 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 [...]

Software Installation 35 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 App[...]

T1 Modem Bank 36 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[...]

Software Installation 37 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 T1 Modem Bank Configuration Screen 4. Use the arrow keys to select the field you wish to change,[...]

T1 Modem Bank 38 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 [...]

Software Installation 39 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 [...]

T1 Modem Bank 40 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 M[...]

Software Installation 41 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 m[...]

T1 Modem Bank 42 Figure 19 Line Card Status Display[...]

Software Installation 43 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 com ponent, they must be applied to the T1 Modem Bank. Select “Apply” from the “Window” menu or click the “Apply” button.[...]

T1 Modem Bank 44 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 transm it data if their CTS (Clear To Send) line is LOW. These termina[...]

Software Installation 45 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 l[...]

T1 Modem Bank 46 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)[...]

Software Installation 47 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 equipm ent list, the m odem on/off-hook status, and the alarm status. Thus there are 5 basic functions provided by the interface: 1. T1 interface[...]

T1 Modem Bank 48 The initial screen is shown below. ----------------------------------------------------------------------------- Modem Bank Configuration ----------------------------------------------------------------------------- Parameter | Possible values <>=selected []=active -------------------------------------------------------------[...]

Software Installation 49 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 m argin. For example, the parameter “Span Type” has the selector value 5. From this T1 configuration display, the[...]

T1 Modem Bank 50 ( The user stores the new configuration and makes it “active” by entering “s” ) : s ----------------------------------------------------------------------------- Modem Bank Configuration ----------------------------------------------------------------------------- Parameter | Possible values <>=selected []=active ----[...]

Software Installation 51 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 comma nd prompt. There are four component types that can be displayed: m otherboard, line card, power supply and modem cards. The motherboard and linecard component[...]

T1 Modem Bank 52 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 Bank System Info -----------------------------------------------------------------------[...]

Software Installation 53 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[...]

T1 Modem Bank 54 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 heartbe[...]

Software Installation 55 An example of the alarm and loopback status display when there are alarm s is shown below. In this case no loopbacks are active. -------------------------------------------------- Modem Bank Alarm Status -------------------------------------------------- Hit any Key to Cancel Display RcvAlarm TxAlarm Signal Loopbacks ------[...]

T1 Modem Bank 56 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 t[...]

Diagnostics 57 Running Diagnostics with QuickManager QuickManager is started by clicking the “ Digi” program group, and then clicking the QuickManager icon. Clicking “Window” in the main m enu will allow you to view the current configuration settings, change the configuration settings, or run a test on the selected component. (You can alter[...]

T1 Modem Bank 58 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 Mod[...]

Diagnostics 59 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 [...]

T1 Modem Bank 60 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 contin[...]

Diagnostics 61 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[...]

T1 Modem Bank 62 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 7- segment displays and the decimal point of the second 7-s[...]

Diagnostics 63 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-segm ent display. Errors are counted on th[...]

T1 Modem Bank 64 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[...]

Component Removal and Installation 65 Component Removal and Installation This section provides replacem ent instructions for various com ponents. 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 b[...]

T1 Modem Bank 66 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 po[...]

Component Removal and Installation 67 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 [...]

T1 Modem Bank 68 Modem Card Removal and Installation/Replacement Modem Card Removal Modem cards can be “hot swapped”, m eaning that no system reset is needed after a modem card is pulled out and replaced with another modem card. This does not m ean that modem boards should be moved from slot to slot without cause, since the motherboard senses a[...]

Component Removal and Installation 69 Figure 23 Modem Card[...]

T1 Modem Bank 70 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. Fol[...]

Component Removal and Installation 71 Figure 24 Quick Manager Modem Revision Screen 2. 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 m odem card. Pull the ejector levers, then slide the malfunctioning modem card ou[...]

T1 Modem Bank 72 Perform the following steps to install a modem card: 1. Before installing an additional modem card into an empty slot, you m ust 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 [...]

Component Removal and Installation 73 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. • Wear a grounding strap while perform ing the following procedure to prevent electrical disch[...]

T1 Modem Bank 74 Figure 25 Power Supply[...]

Component Removal and Installation 75 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 t[...]

T1 Modem Bank 76 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 thi[...]

Connections to the Telephone Network 77 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 m odulates serial data into voice-like signals for transmission. At the receiving end of a circuit, or connection, another modem dem odulates the i[...]

T1 Modem Bank 78 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 a[...]

Physical Specifications 79 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 ap[...]

T1 Modem Bank 80 T1 Modem Bank Environmental Requirements The T1 Modem Bank meets all functional requirements in this m anual 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 appl[...]

Physical Specifications 81 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. • Belden 8-wire (4 twisted pair) #9806, or Belden 4-wire (2 twisted pair) #9804 HD-15 subminiature connectors, 1 male (AMP #748364-1 or equivalent; cont[...]

T1 Modem Bank 82 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. 950 Telecom: USA: FCC part 68 Canada: ICCS 003[...]

Glossary 83 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 data- carrying capacity of a circuit. (Greater bandwidth indicates higher speed data-transfer.) B8ZS (Binary 8-Zero Suppression)  a line coding method for[...]

T1 Modem Bank 84 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)  [...]

Appendix A 85 Appendix A — Memory Conflicts Contention for Memory Addresses Many intelligent peripheral devices require a block of vacant memory addresses on the host com puter’s bus for their own use. These m emory addresses m ay be used to access a dual-ported RAM on the peripheral device to facilitate the transfer of large volumes of data be[...]

T1 Modem Bank 86 Figure 30 Typical PC Memory Usage - 1st Megabyte A0000h AFFFFh B0000h BFFFFh C0000h C8000h D8000h CFFFFh C7FFFh D7FFFh D0000h DFFFFh E0000h EFFFFh F0000h FFFFFh ESDI Hard Disk Drive SCSI Interface EGA/VGA ROM BIOS System BIOS BIOS Extensions (EBIOS) EMM, LIM 4.0 Color Video Memory System Memory (RAM) System Memory (RAM) in 640K sys[...]

Appendix A 87 ISA Host Adapters The Digi ISA EPC/X host adapter has 1 m egabyte of on-board dual-ported RAM which is accessed through a 32K “window”, which can be mapped into any 32K region in the com puter’s mem ory address space (32K byte boundaries end with either 0000h or 8000h). The dual-ported RAM can also be mapped in its entirety into[...]

T1 Modem Bank 88 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 mem ory address space up to the 4 gigabyte limit. The EISA EPC/X configuration file provides sixteen address ranges below 1 megabyte[...]

Appendix B 89 Appendix B — Transmission Modes The EPC/X host adapter and the T1 Modem Bank transmit synchronous data in one of 75 m odes. 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. The 75 modes and their def[...]

T1 Modem Bank 90 4-Wire, Self Clocked Mode# Mode Baud Rate Mode# Mode Baud Rate 1 NRZI 230K 64 NRZI 460K 2 FM 460K 65 FM 460K 60 NRZI 115K 66 NRZI 921K 61 FM 115K 67 FM 921K 62 NRZI 230K 68 NRZI 1843K 63 FM 230K 69 FM 1843K[...]

Appendix C 91 Appendix C — Terminal Port Cable Some terminals will not transm it data if their CTS (Clear To Send) line is LOW. These terminals m ust have their CTS line HIGH or floating to ensure that they will have no problems com municating with the T1 Modem Bank. The cable shown in Figure 31 can be used if a terminal of this kind does not req[...]

T1 Modem Bank 92 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 [...]

Appendix D 93 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 [...]

T1 Modem Bank 94 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 E[...]

Appendix E 95 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 megabaud 1 ), this wiring m ethod is more economical, and is sufficient in all but the most dem anding high-performance appli[...]

T1 Modem Bank 96 Restrictions on Daisy Chain Cable Lengths The maximum length of a daisy chain is dependent upon the synchronous data rate. Table 8 lists the maxim um cumulative daisy chain cable lengths for various baud rates. For exam ple, to run a synchronous line at 10 megabaud, the total length of all daisy chain cables for that synchronous li[...]

Appendix E 97 Eight-Wire Synchronous Modem Wiring Eight-Wire Synchronous Modem wiring allows T1 Modem Bank units to be installed in rem ote 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[...]

T1 Modem Bank 98 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[...]

Appendix F 99 Appendix F — Modem AT Command Set Default values of command param eters, 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 <Enter>. A Answer Causes the modem to go off-hook [...]

T1 Modem Bank 100 D n Dial Command Initiates the dialing sequence. The string n includes the dial modifiers and the telephone number to be dialed. Dial Modifiers: 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-[...]

Appendix F 101 I n 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 27C0[...]

T1 Modem Bank 102 N n Select Negotiate Handshake Controls automode enable/disable. N0 : When originating or answering, handshake only at the comm unication rate specified by register S37 and command B n , with no fallback. *N 1 : When originating or answering, start handshake at the comm unication standard specified by register S37 and command B n [...]

Appendix F 103 S n ? 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 comma nd or dial modifier is received. Tone dial is the default setting. V n Result Code Format Controls whether result c[...]

T1 Modem Bank 104 Y n Dummy Command Dummy command for compatibility. Y0 : Returns OK. Y1 : Returns OK. Z n 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: OK[...]

Appendix F 105 AT& (Ampersand) Commands &B n 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 connecti[...]

T1 Modem Bank 106 &G n Guard Tone Operation Determines which guard tone, if any, to transmit while transm itting in the high band (answer mode). Used only in V.22 and V.22 bis mode. * &G0 : No guard tones. &G1 : 550 Hz guard tone. &G2 : 1800 Hz guard tone. Result Codes: OK Returned when n = 0, 1 or 2. ERROR Returned for any other va[...]

Appendix F 107 &M n 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 comma nd mode, select &D1 and drop DTR. &M2 : Sync mode 2. Autodial stored #0 when DTR changes from off to on, ignore &D option, always &[...]

T1 Modem Bank 108 &S n Data Set Ready Option Controls the functions of DSR. DSR indicates when the modem is connected to a com munications channel and is ready. Async mode only. If the modem is in Sync mode, DSR is on during handshake and when on- line. DSR is off in test or idle mode. * &S0 : DSR always on. &S1 : DSR on during handshak[...]

Appendix F 109 &V n 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 : Vie[...]

T1 Modem Bank 110 &X n 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) &[...]

Appendix F 111 AT% (Percent) Commands %A n 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 . De[...]

T1 Modem Bank 112 AT (Backslash) Commands A n 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 transm itting smaller blocks reduces retransmission and improves throughput. A0 : Max 64 ch[...]

Appendix F 113 J n Constant DTE Speed Option * J0 : DCE and DTE rates are independent. J1 : DTE rate adjusts to DCE connection rate after online. Result Codes: OK Returned when n = 0 or 1. ERROR Returned for any other value of n . K n Set Break Control Selects the way in which the modem handles a break signal. The Modem Xem can handle a break i[...]

T1 Modem Bank 114 N n 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: OK Returned when n = 0,[...]

Appendix F 115 X n 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. * X 0 : 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 [...]

T1 Modem Bank 116 AT- (Dash) Commands -J n Set V.42 Detection Phase Defines whether the originating modem sends a sequence to the answering m odem to determ ine the type of error correction it has enabled. -J0 : Disables the V.42 detection phase. * -J1 : Enables the V.42 detection phase. Result Codes: OK Returned when n = 0 or 1. ERROR Returned for[...]

Appendix F 117 AT" (Quote) Commands "H n 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: OK Retur[...]

T1 Modem Bank 118 Class 1 FAX Commands The Digi Modem/Xem supports FAX com mands conform ing to EIA standard 578. These comm ands 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 In[...]

Appendix F 119 Table 9 Supported FAX Transmit/Receive Modulations n 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.17S[...]

T1 Modem Bank 120 Class 2 FAX Commands +FAA= n FAX Auto Answer Enable Command Syntax: +FAA= <value> 0: Answer as FAX modem of type specified by +FCLASS . 1: Automatically determine whether to answer as FAX or data modem. +FAXERR T.30 Session Error Report Command syntax: +FAXERR Response syntax: +FAXERRR= <value> 0-9 Call placement and t[...]

Appendix F 121 +FBOR Data Bit Order Selection. Command syntax: +FBOR= <value> 0: Direct bit order for both Phase C data and Phase B/D data. 1: Reversed bit order for Phase C data and direct bit order for Phase B/D data. 2: Direct bit order for Phase C data and reversed bit order for Phase B/D data. 3: Reversed bit order for both Phase C data [...]

T1 Modem Bank 122 +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: Vertical resolution 0: Normal, 98 lpi 1: Fine, 196 lpi BR: Bit rate 0: 2400 bps V.27ter 1: 4800 bps V.27ter 2: 7200 bps V.29 or V.17 3: 9600 bps V.29 or V.17 4: 12000 bps V.33 or V.17 5: 14400 bp[...]

Appendix F 123 +FDCS Current Session Results. Command syntax: +FDCS? Response syntax: VR,BR,WD,LN,DF,EC,BF,ST Valid Values: VR: Vertical resolution 0: Normal, 98 lpi 1: Fine, 196 lpi BR: Bit rate. 0: 2400 bps V.27ter 1: 4800 bps V.27ter 2: 7200 bps V.29 or V.17 3: 9600 bps V.29 or V.17 4: 12000 bps V.33 or V.17 5: 14400 bps V.33 or V.17 WD: Page wi[...]

T1 Modem Bank 124 +FDFFC Data Compression Format Conversion Command syntax: +FDFFC= <value> 0: Disable mismatch checking. The DTE must check the +FDCS:DF subparameter, and transfer matching data. +FDIS 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: Vertical [...]

Appendix F 125 +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= <value> 0: Error correcting [...]

T1 Modem Bank 126 +FMFR Manufacturer’s Identification. Command syntax: +FMFR? Response value: The information text cannot exceed 2048 characters. This command causes the m odem to send one or m ore lines of information text which is used to identify the manufacturer. +FREV Request Product Revision Identification. Command syntax: +FREV? Response v[...]

Appendix F 127 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 o[...]

T1 Modem Bank 128 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 ATZ n comm and. In addition, the designated default pro[...]

Appendix F 129 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, t[...]

T1 Modem Bank 130 S6 Wait Before Dialing Sets the length of tim e, 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 minim um of 2 s, even if the value of S6 is less than 2 s. The wait for dial tone call progress feature (W dial m odifier in the di[...]

Appendix F 131 S12 Guard Time Defines the maxim um 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[...]

T1 Modem Bank 132 S16 Bit-Mapped Option Status Indicates the test in progress status. Default: 000 Bit 0 Local analog loopback 0 local ALB disabled 1 local ALB enabled ( &T1 ) Bit 1 Reserved Bit 2 Local digital loopback 0 local DL disabled 1 local DL enabled ( &T3 ) Bit 3 Remote digital loopback (RDL) status 0 RDL off 1 RDL in progress Bit [...]

Appendix F 133 S18 Modem Test Timer Sets the length of time, in seconds, that the modem conducts a test (comm anded by &T n ) before returning to the command m ode. If this register value is zero, the test will not automatically term inate; the test must be term inated from the command mode by issuing an &T0 or H command. Range: 0-255 secon[...]

T1 Modem Bank 134 S21 Bit-Mapped Options Indicates the status of command options. Default: (30h), (048d), (00110000b) Bit 0 Reserved. Bit 1 Reserved Bit 2 CTS behavior ( &R n ) 0 &R0 CTS follows RTS 1 &R1 CTS is always on Bit 4, 3 DTR behavior ( &D n ) 00 &D0 ignore 01 &D1 return to command mode 10 &D2 disconnect 11 &[...]

Appendix F 135 S22 Bit-Mapped Options Indicates the status of command options. Default: (76h), (118d), (01110110b) Bit 1, 0 Speaker volume ( L n ) 00 L0 is selected 01 L1 is selected 10 L2 is selected 11 L3 is selected Bit 3, 2 Speaker control ( M n ) 00 M0 is selected 01 M1 is selected 10 M2 is selected 11 M3 is selected Bit 6, 5, 4 Result codes a[...]

T1 Modem Bank 136 S23 Bit-Mapped Options Indicates the status of command options. Default: (001), (015d), (00001111b) Bit 0 Grant RDL 0 &T5 is selected 1 &T4 is selected Bit 3, 2, 1 Reserved Bit 5, 4 Word length (7 bits) 00 even parity 01 space parity 10 odd parity 11 mark parity Bit 7, 6 Guard tones ( &G n ) 00 disabled 01 550 Hz 10 18[...]

Appendix F 137 S27 Bit-Mapped Option Indicates the status of command options. Default: (40h), (064d), (01000000b) Bit 3, 1, 0 Synchronous/asynchronous selection ( &Q n , &M n ) 000 &Q0 , &M0 is selected 001 &Q1 , &M1 is selected 010 &Q2 , &M2 is selected 011 &Q3 , &M3 is selected 100 &Q4 , &M4 is sele[...]

T1 Modem Bank 138 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 con[...]

Appendix F 139 S44 Bit-Mapped Option Status Default = (17h) (023d) (00010111b) Bit 0 V.42bis status 0 disabled 1 enabled Bit 1-2 V.42bis selection ( "H n ) 00 "H0 is selected 01 "H is selected 10 "H2 is selected 11 " H3 selected Bit 3 Reserved Bit 4 Auto fallback/fall forward selection ( %G n ) 0 %G0 is selected 1 %G1 is se[...]

T1 Modem Bank 140 S51 Data/FAX DTE Flow Control Selection Default = 003 Bit 0-2 ( &K n , Q n ) 000 &K0 , Q0 are selected 001 &K1 , Q1 are selected 010 &K2 , Q2 are selected 011 &K3 , Q3 are selected Bit 3 Reserved Bit 4 XON/XOFF flow control ( G n ) 0 G0 is selected 1 G1 is selected Bit 5 DTE/DCE rate ( J n ) 0 J0 is s[...]

Appendix F 141 S58 BTLZ String Length Default = 032 Range: 6-64 bytes S59 Bit-Mapped MNP Options Default = 001 Bit 0 MNP 5 status ( %C n ) 0 %C0 is selected 1 %C1 is selected S62 DTE Rate Status Default = 018 0 300 bits/s 1 600 bits/s 2 1200 bits/s 3 2400 bits/s 4 4800 bits/s 5 7200 bits/s 6 9600 bits/s 7 12000 bits/s 8 14400 bits/s 9 16800 bits/s [...]

T1 Modem Bank 142 S72 DTE Speed Select During Data Transfer Default = 000 0 last autobaud speed 1 300 bits/s 2 600 bits/s 3 1200 bits/s 4 2400 bits/s 5 4800 bits/s 6 7200 bits/s 7 9600 bits/s 8 12000 bits/s 9 14400 bits/s 10 16800 bits/s 11 19200 bits/s 12 21600 bits/s 13 24000 bits/s 14 26400 bits/s 15 28800 bits/s 16 31200 bits/s 17 33600 bits/s [...]

Appendix F 143 Result Codes The modem connect message is controlled by ATQ , ATV , ATW , ATX , and ATV . 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 [...]

T1 Modem Bank 144 Extended Message Options ATV1 affects only ATW0 and ATW2 commands. If ATW0 , ATV1 , and ATV0 are selected and the DTE rate is 57600 bits/s, then “CONNECT 57600” will be displayed regardless of protocol. If ATW0 , ATV1 , and ATV1 , are selected and the DTE rate is 57600 bits/s, then: a. “CONNECT 57600/NONE” will be displ[...]

Appendix F 145 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[...]

T1 Modem Bank 146 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 carri[...]

Appendix F 147 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 [...]

T1 Modem Bank 148 83 PROTOCOL: MNP 2, 4 This message is sent to the DTE when the modem has connected in the MNP m ode 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 m ode of error correction, and PROTOCOL message reporting has been e[...]

Index 149 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. See Clear To Send Daisy Chain, 16 Daisy Chain Wiring, 94 Eight-Wire Direct, 94 Eight-Wire Synchronous Modem, 97 Four-Wire Direct, 95 Length Restrictions, 96 Data [...]

T1 Modem Bank 150[...]