Page 1 You have accessed an older version of a Paradyne product document. Paradyne is no longer a subsidiary of AT&T. Any reference to AT&T Paradyne is amended to read Paradyne Corporation.
Page 2 COMSPHERE 392x Plus Modems Models 3920 Plus and 3921 Plus Installation and Operation Manual Document No. 3920-A2-GN31-10 P a r a dyn e Printed on recycled paper April 1995...
Page 3 AT&T Paradyne Corporation makes no representation or warranties with respect to the contents hereof and specifically disclaims any implied warranties of merchantability or fitness for a particular purpose. Further, AT&T Paradyne Corporation reserves the right to revise this publication and to make changes from time to time in the contents hereof without obligation of AT&T Paradyne Corporation to notify any person of such revision or changes.
Page 4: Important Safety Instructions
Safety Instructions Important Safety Instructions Read and follow all warning notices and instructions marked on the product or included in the manual. This product is intended to be used with a three-wire grounding type plug – a plug which has a grounding pin. This is a safety feature. Equipment grounding is vital to ensure safe operation.
Page 5 HIS OWN EXPENSE. THE AUTHORITY TO OPERATE THIS EQUIPMENT IS CONDITIONED BY THE REQUIREMENTS THAT NO MODIFICATIONS WILL BE MADE TO THE EQUIPMENT UNLESS THE CHANGES OR MODIFICATIONS ARE EXPRESSLY APPROVED BY AT&T PARADYNE. WARNING TO USERS OF DIGITAL APPARATUS IN CANADA:...
Page 6: Table Of Contents
Table of Contents Preface Objectives and Reader Assumptions ......How to Use This Manual .
Page 7 COMSPHERE 392xPlus Modems DCP Operation Overview ..........Diagnostic Control Panels .
Page 8 Table of Contents Appendices Menu Tree ......... Troubleshooting .
Page 9: List Of Figures
COMSPHERE 392xPlus Modems List of Figures Figure Page Model 3920Plus ........... . . Model 3921Plus .
Page 10 Table of Contents List of Tables Table Page Technical Specifications for 392xPlus Modems ......Model 3920Plus and Model 3921Plus DCP LEDs .
Page 11 COMSPHERE 392xPlus Modems Table Page Mux Operation ............EIA-232-D Pin Assignments .
Page 12: Preface
Preface Objectives and Reader Assumptions This manual describes how to install and operate the COMSPHERE 3920Plus standalone and 3921Plus carrier-mounted modems. This manual assumes that you have a basic understanding of modems and their operation. How to Use This Manual Chapter 1 provides technical specifications, information about the 3900Plus modems’...
Page 13: Related Documents
3600 Hubbing Device, Feature Number 3600-F3-300, Installation Instructions 3920-A2-GK41 COMSPHERE 392xPlus Modems, Models 3920Plus and 3921Plus, Installation Instructions 3920-A2-GK40 COMSPHERE 3900 Series Modems, Model 3921Plus, Ferrite Choke Installation Instructions Ordering Information To order AT&T Paradyne documentation, please call 1-800-545-2354, extension 2222. viii April 1995 3920-A2-GN31-10...
Page 14: Introduction
Introduction Overview ........... . Features .
Page 15: Multipoint Applications
4800 bps), V.22bis (2400 bps), V.22 (1200 bps), V.23 (1200 and 600 bps), V.21 (300 bps), Bell 212A (1200 bps), and Bell 103J (300 bps). Channel adaptive Trellis-Coded Modulation, AT&T Paradyne’s advanced Trellis-Coded transparent forward error correction for Trellis multipoint and high-speed point-to-point applications.
Page 16: Dual-Leased Backup Applications
Introduction Dual-Leased Backup Applications In dual-leased backup applications, a 2-wire leased line is used as the backup facility instead of the normal 2-wire dial line. Plug the leased line into the jack labeled DIAL on the rear panel of the modem (see Figure 2-1 in Chapter 2), and enable the Dual_Leased_Ln configuration option.
Page 17: Comsphere 392Xplus Models
COMSPHERE 392xPlus Modems COMSPHERE 392x Plus Models The 392xPlus family is available in two models: the Model 3920Plus, a 4-wire/2-wire standalone modem, and the Model 3921Plus, a carrier-mounted version of the standalone unit. Standalone Model 3920 Plus 4-Wire/2-Wire Modem The standalone Model 3920Plus modem (Figure 1-1) is capable of either 4-wire/2-wire leased-line or dial operation.
Page 18: Carrier-Mounted Model 3921Plus 4-Wire/2-Wire Modem
Introduction Carrier-Mounted Model 3921 Plus 4-Wire/2-Wire Modem The carrier-mounted Model 3921Plus modem (Figure 1-2) installs into a COMSPHERE 3000 Series Carrier. The Model 3921Plus modem’s faceplate covers two slots in the carrier. It has 20 LED status indicators for displaying modem activity and an audio speaker jack for the carrier’s optional speaker.
Page 19: Government Requirements And Equipment Return
COMSPHERE 392xPlus Modems The Model 3921Plus derives ac power from the COMSPHERE 3000 Series Carrier’s backplane, which is a common bus to all devices installed in the carrier. The user interface to any Model 3921Plus is through the shared diagnostic control panel (SDCP), an optional feature which operates in a manner similar to the DCP on the Model 3920Plus.
Page 20: Equipment Warranty And Support
Equipment Warranty and Support AT&T Paradyne’s Customer Assistance Center is available 24 hours a day to help you place an installation request, report a hardware or software problem, or place a trouble report. The center provides technical support and remotely diagnoses equipment problem.
Page 21: Enhanced Support Services
Load Numbers of all devices does not exceed 100. If your equipment is in need of repair, contact the AT&T Paradyne Regional Sales Office nearest you. If you are unable to contact a regional sales office, arrange to have your equipment repaired by contacting Inventory Control Office, 100 York Blvd., Suite 200, Richmond Hill, Ontario...
Page 22: Technical Specifications
Technical Specifications for 392x Plus Modems Specifications Description APPROVALS Model 3920 Plus, 3921 Plus, and Refer to the product labeling or contact your local AT&T Paradyne COMSPHERE 3000 Series Carrier Representative. COMPATIBILITY Leased-Line Modulations: AT&T Paradyne V.34 (33,600, 31,200 bps) CCITT V.34 (28,800, 26,400, 24,000, 21,600, 19,200, 16,800, 14,400,...
Page 23 COMSPHERE 392xPlus Modems Table 1-1 (2 of 2) Technical Specifications for 392x Plus Modems Specifications Description POWER CONSUMPTION Model 3920 Plus 8 watts (typical, including power supply, speaker off) Model 3921 Plus 6 watts (typical, each card) (Speaker consumption is approximately 1 watt at high volume.) DIMENSIONS Weight...
Page 24: Modem Installation
Modem Installation Overview ........... . 392xPlus Modem Package .
Page 25: Model 3920Plus Modem Installation
Model 3921Plus modem Two rear connector plates with two DB-25-S edge card connectors on each plate If any hardware components are damaged, notify your AT&T Paradyne representative. Return equipment using the procedures described in the Government Requirements and Equipment Return section of Chapter 1.
Page 26: Connecting Cables To The Model 3920 Modems
Modem Installation The rear panel of the Model 3920Plus modem (Figure 2-1) has the following switches and connectors: An ON/OFF power switch. An 8-pin DIN type power receptacle (PWR) for the dc power supply. An 8-pin modular keyed jack (LEASED) for 4-wire/2-wire leased lines. An 8-pin modular keyed jack (DIAL) for backup lines (2-wire dial or 2-wire leased).
Page 27: Dte Connection
COMSPHERE 392xPlus Modems DTE Connection Use the following procedures to connect an EIA-232-D cable from the modem to a DTE: 1. Make sure the modem’s rear panel power switch is OFF. 2. Connect the DB-25-P (plug) connector on the cable to the DB-25-S (socket) connector (Figure 2-1) on the modem’s rear panel.
Page 28: Model 3920Plus Leased Backup Connection
Modem Installation Model 3920 Plus Leased Backup Connection For the Model 3920Plus, use the following procedures to connect the modem to the 2-wire leased backup network interface: 1. Insert the 8-position, 8-conductor modular plug into the jack labeled DIAL (Figure 2-1). 2.
Page 29: Modem Power-Up
COMSPHERE 392xPlus Modems Modem Power-Up Once your modem is properly connected to the power supply, leased and/or dial lines, and the DTE, press the modem’s rear panel power switch to the ON position. The modem begins a power-up self-test, in which all DCP LEDs light. This test takes several seconds to perform, and verifies the operation of most hardware components within the modem.
Page 30: Using The Diagnostic Control Panel (Dcp)
Modem Installation Using the Diagnostic Control Panel (DCP) The DCP’s liquid crystal display (LCD) consists of two 16-character lines which display modem status, control functions, and configuration options as well as indicating your location in the Top-Level menu tree (Appendix A). To change a factory template from the Sync Leased preset configuration using the DCP, perform the following steps: 1.
Page 31: Removing And Replacing Model 3920Plus Modems
3. Disconnect the leased-line and dial modular cords from the modem’s rear panel. 4. Disconnect the DTE interface cables from the modem’s rear panel. If the modem is to be removed for service, return it to AT&T Paradyne using the procedures described in Government Requirements and Equipment Return in Chapter 1.
Page 32 Modem Installation 2. At the front of the carrier, hold the modem vertically, with the latch on its faceplate in the open position, and insert it into the top and bottom card guides of one of the odd slots numbered 1–15 (Figure 2-2). Slide the modem into the slot, aligning the modem with the rear connector plates, until the backplane connector and DTE connector seat firmly into the back of the carrier.
Page 33 COMSPHERE 392xPlus Modems If the modem is to communicate with an installed SDCP, install the modem as described above and perform the following steps: 1. Press the key on the SDCP. The cursor appears in the slot selection entry. Select "...
Page 34: Removing And Replacing Model 3921Plus Modems
Modem Installation Figure 2-3. Circuit Pack Lock Removing and Replacing Model 3921 Plus Modems CAUTION If the Model 3921 Plus is removed from the carrier, always use a ground strap when handling the modem. Always store the Model 3921 Plus in an antistatic bag when it is removed from the carrier.
Page 35: Dcp Operation
DCP Operation Overview ........... . Diagnostic Control Panels .
Page 36: Overview
COMSPHERE 392xPlus Modems Test Branch ........... 3-53 Abort .
Page 37: Status Indicators
DCP Operation Model 3920 Plus Diagnostic Control Panel The diagnostic control panel (DCP) of the Model 3920Plus modem (Figure 3-1) contains status indicators, pushbutton-type keys, an LCD, and speaker grill. Figure 3-1. Model 3920 Plus DCP Model 3921 Plus Faceplate and Shared Diagnostic Control Panel (SDCP) The shared diagnostic control panel (SDCP), Figure 3-2, is used to manage carrier-mounted Model 3921Plus modems.
Page 38 COMSPHERE 392xPlus Modems Figure 3-2. Optional SDCP and Model 3921 Plus Faceplate April 1995 3920-A2-GN31-10...
Page 39 DCP Operation Table 3-1 (1 of 2) Model 3920 Plus and Model 3921 Plus DCP LEDs Label Color Indicates green Power has been applied to the modem. Alrm Flashing – A major alarm has been detected in a remote 392x Plus modem. ON –...
Page 40 COMSPHERE 392xPlus Modems Table 3-1 (2 of 2) Model 3920 Plus and Model 3921 Plus DCP LEDs Label Color Indicates ON – The selected port* is one of the mux ports (either 1, 2, 3, or 4). Port* 1,2,3,4 green (3921Plus OFF –...
Page 41: Diagnostic Control Panel Operation
DCP Operation Diagnostic Control Panel Operation The 392xPlus modem’s diagnostic control panel (DCP) is the user interface to all functions used to configure and control the modem. In addition to the status LEDs, this interface includes the liquid crystal display (LCD) and keypad (Figure 3-3). LCD TOP LINE HIDDEN CHOICE INDICATOR...
Page 42: Other Indicators
COMSPHERE 392xPlus Modems Other Indicators Other indicators may turn on depending on existing conditions, such as error detection, informational alerts, and warnings. These indicators appear on the top or bottom line of the LCD. Remote Mode Indicator If the local 392xPlus modem establishes a connection with the remote 392xPlus modem via the Remote branch, then appears in the upper right corner of the LCD top line on both modems.
Page 43: Menu Structure
DCP Operation Keys Function keys F1, F2, and F3 select the LCD choice that appears above the function key. Refer to the Summary section in Chapter 4 for the exception. If the displayed LCD choice spans more than one function key, then any of the function keys select that choice.
Page 44 COMSPHERE 392xPlus Modems The menu tree contains the following branches: Status — Used to monitor the current status of the VF line and DTE interface as well as view the identity of the modem. Configure — Used to change and save the modem’s configuration options. PList —...
Page 45: Top-Level Menu Status And Operational Messages
DCP Operation Top-Level Menu Status and Operational Messages Access to all menu tree branches from the DCP begins at the Top-Level menu, the head of the menu hierarchy. The LCD’s top line identifies the modem status, as listed in Table 3-3, while the bottom line displays the main menu tree branches as well as operational and security messages, as listed in Table 3-4 and Table 3-5.
Page 46 COMSPHERE 392xPlus Modems Table 3-3 (2 of 3) Top-Level Menu Status Status Message Indicates Call Failure Busy Signal The answering modem is busy. Delayed As a result of failed call attempts, this number can not be called at this time. Please try again later.
Page 47 DCP Operation Table 3-3 (3 of 3) Top-Level Menu Status Status Message Indicates Call Disconnect ATH Disconnect The modem has disconnected due to an ATH command. Bad Lines Disc The modem has disconnected because the lines do not support the modulation and/or data rate selected.
Page 48 COMSPHERE 392xPlus Modems Messages listed in Table 3-4 are common operational messages that occur during modem operation. These messages normally appear on the second line of the LCD. Table 3-4 Common Operational Messages Common Indicates Operational Message Please Wait... A command to a local device takes more than two seconds to complete. Command Sent...
Page 49: Quick Configuration Display
DCP Operation Quick Configuration Display The Quick Configuration display indicates the basic operational characteristics of the modem. Leased:28.8 Status Configure The modem’s Quick Configuration information appears on the LCD’s bottom line. To access the Quick Configuration display from the Top-Level display, press the key.
Page 50 COMSPHERE 392xPlus Modems Displays the modem DTE port that is currently being displayed by the EIA status indicators on the DCP. indicates Port 1 when MUX Mode configuration option is disabled. indicates Port 1 when TDM/MSD is enabled. indicates Port 2 when TDM/MSD is enabled. indicates Port 3 when TDM/MSD is enabled.
Page 51: Status Branch
DCP Operation Status Branch The Status branch of the Top-Level menu allows you to view the current status of the leased-line or dial connection, the identity (for example, serial number and model number) of your equipment, and the DTE interface. “Status”...
Page 52: Device Health And Status (Devicehs)
COMSPHERE 392xPlus Modems Device Health and Status (DeviceHS) DeviceHS provides a ‘‘snapshot” of current modem alarms which are active at the time the DeviceHS function is selected. To access DeviceHS from the Status branch, make the following selection: Status: > DeviceHS Select DeviceHS.
Page 53 DCP Operation Table 3-6 (2 of 3) Health and Status Messages Type Message Indicates Status Subtree Truncate Downstream health and status information has been truncated because it overflowed system limits. There is a large amount of health and status information in the subnetwork. Test Mode The modem or an upstream device is running a disruptive test.
Page 54 COMSPHERE 392xPlus Modems Table 3-6 (3 of 3) Health and Status Messages Type Message Indicates Security Database Reset The security database has been reset (passwords erased). Password Protect Security password protection is enabled. Mode Change There has been a change in security mode. (Refer to Chapter 6, Dial Access Security .) Password Change A security password has been changed.
Page 55: Displaying Vf Conditions
DCP Operation Displaying VF Conditions Status:VF Display Clear To display VF conditions, select Display from the Status:VF screen. Status:VF > SigQual=Excelent If the modem is receiving a signal, the signal quality appears on the LCD’s bottom line. If the modem is not receiving a signal, the message No Signal appears. Press the key to scroll and view the VF conditions.
Page 56: Clearing Vf Counters
COMSPHERE 392xPlus Modems EchoFreqOff Echo Frequency Offset displays the frequency offset of the far end echo. This parameter appears for V.34, V.32 terbo, V.32bis, and V.32 modulations (in 2-wire only). Phase Hts Phase Hits reports the total hit count of sudden uncontrolled changes in the phase of the receive signal for the past 15 minutes.
Page 57: Identity
FPt # Firmware part number is an 11-digit number that identifies to AT&T Paradyne personnel the firmware release number. Country Country code is a 7-text character that identifies the current country code. To exit the Identity function and remain in the Status branch, press the key.
Page 58: Dte
COMSPHERE 392xPlus Modems DTE displays the state and/or activity of the following interface leads: LSD, DTR, DSR, TST, TXD, RXD, RTS, and CTS. The interface leads status is updated every 5 seconds. To access DTE from the Status branch, make the following selections: NOTE When the DTE Bridge configuration option is enabled, only Ports 1 and 2 are available for display.
Page 59 DCP Operation V.34 When running V.34 modulation, this function displays information about the modem’s receiving and transmitting data rate, symbol rate, transmitting level, and asymmetric rate. NOTE The V.34 status display is available only when the modem is configured for V.34 modulation. To access V.34 from the Status branch, make the following selection: Status: V.34...
Page 60: Backup
COMSPHERE 392xPlus Modems Backup The Status Backup function displays the configuration of the modem’s current operating line facility and the configuration and condition of the inactive line. NOTE The modem’s rear panel has two line interface jacks: LEASE and DIAL (see Figure 2-1 in Chapter 2). The jack labeled LEASE is the APL primary interface and accepts either 2-wire or 4-wire APL.
Page 61 DCP Operation Table 3-7 provides information about the Status Backup screens. The first column lists all possible configurations for the modem’s currently active line. The second column lists all possible configurations for the modem’s inactive lines. The third column provides information about the inactive line condition.
Page 62: Options
Top-Level menu, press the key. Record Record is a troubleshooting tool used in conjunction with AT&T Paradyne support personnel. This function retrieves and reports any sequence faults to support personnel. A sequence fault is an irregular or unexpected event. There are two selections under Record: Display and Clear. Display allows up to eight sequence fault messages that are recorded by the modem and displayed on the LCD in descending order.
Page 63: Service Log
Service Log Service Log is a troubleshooting tool used in conjunction with AT&T Paradyne support personnel. Use this function to retrieve and report Service Log data to support personnel. To access Service Log from the Status branch, make the following selections: Status: <...
Page 64: Configure Branch
COMSPHERE 392xPlus Modems Select Nxt to scroll through the entries in the Service Log. To exit this function and remain in the Status branch, press the key. To exit and return to the Top-Level menu, press the key. Configure Branch The Configure branch of the LCD allows you to change and save the modem’s configuration options.
Page 65: Display
DCP Operation Leased:28.8 PList Control Press the key until PList appears. Select PList. Within a network link, a control modem can communicate with a tributary modem by using the tributary modem’s network management address for polling functions. Each TMp tributary modem must have a different network management address.
Page 66: Clear
COMSPHERE 392xPlus Modems Select Nxt to scroll through the entries in the Active or Skip poll lists. To exit this function and remain in the PList Display branch, press the key. To exit and return to the Top-Level menu, press the key.
Page 67: Add
DCP Operation To implement Change, select the appropriate function (Active, Delete, or Skip). (For Skip, you will need to press the key until Skip appears.) Poll List:yyyyyy " The function field (yyyyyy) displays the function selected (Active, Delete, or Skip). The address field (xxx) displays the network management address of the modem to be changed.
Page 68: Acquire
COMSPHERE 392xPlus Modems The message Command Complete appears on the LCD to indicate that the tributary modem will be added to the control modem’s poll list. To exit this function and remain in the PList branch, press the key. To exit and return to the Top-Level menu, press the key.
Page 69: Control Branch
DCP Operation Poll List:Acquir Num Acquired The number field (yyy) indicates the total number of devices acquired for the poll list. To exit this function and remain in the PList branch, press the key. To exit and return to the Top-Level menu, press the key.
Page 70: Speaker
COMSPHERE 392xPlus Modems Speaker Speaker allows you to make temporary adjustments to the modem’s speaker volume. Upon a reset, speaker volume returns to its configured setting. For more information on speaker settings, refer to the Misc section in Chapter 4. To access Speaker from the Control branch, make the following selection: Control: >...
Page 71: Reset
DCP Operation Reset Reset causes the modem to stop operation and perform a complete program restart. The modem begins the power-up test sequence that ends with the Top-Level menu displayed on the LCD. Configuration options stored in an Active (Saved) configuration area are copied to the Active (Operating) configuration area.
Page 72: Selecting All Ports
COMSPHERE 392xPlus Modems Data Stream Port1 Disable The port field (for example, Port1) displays the selected port. The available Data Stream action (Disable or Enable) appears on the second line of the LCD beside the port field. If the modem’s data transmitter is enabled, the word Disable appears to indicate that you may disable the data transmitter by selecting this action.
Page 73: Eia Leds
DCP Operation Select DS Port > To change the data stream on all ports again, press the F1 key. To exit this function and remain in the Control branch, press the key. To exit and return to the Top-Level menu, press the key.
Page 74: Make Busy/Remove Make Busy
COMSPHERE 392xPlus Modems After selecting the desired interface, the message Command Complete appears on the bottom line of the LCD and the selected interface appears in the xxxxx field. To exit this function and remain in the Control branch, press the key.
Page 75: Service Line/Disconnect Service Line
DCP Operation Service Line/Disconnect Service Line The Service Line/Disconnect Service Line is only available in Model 3921-B1-001. The Service Line function allows you to switch a specific Model 3921Plus installed in a COMSPHERE 3000 Series Carrier from normal leased or dial operation to service-line operation. This switch only places the modem on the service line.
Page 76: Download Software
392xPlus modem. This type of download requires a locally attached PC controller to be connected to the modem’s DTE port as well as special download software. Any downloads using this selection are intended to be performed by AT&T Paradyne’s Customer Assistance Center representatives only.
Page 77: Clone Remote In Point-To-Point Configurations
DCP Operation DwnLoadSoftware > Clone_Remote Press any function key to select Clone_Remote. The next screen to appear is determined by the modem’s configuration. Refer to the appropriate section based on your modem’s configuration; Clone Remote in Point-to-Point Configurations, Clone Remote in Broadcast Configurations, or Clone Remote in Multipoint Configuration. Clone Remote in Point-to-Point Configurations Before using Clone Remote in point-to-point configurations, verify the following: The 392xPlus modems have an established leased-line connection using either V.34 family,...
Page 78 COMSPHERE 392xPlus Modems Cloning DC Broadcast Remote Before using Clone Remote in DC Broadcast configurations, make sure the tributary modem’s active poll list contains all the network management addresses for the control modems that receive the download (refer to the Poll List Branch section in this chapter), and ensure that the control modems are responding properly to polls (refer to the Sub-Network Health and Status branch section in this chapter).
Page 79: Clone Remote In Multipoint Configurations
DCP Operation Clone Remote in Multipoint Configurations A Trellis Multipoint (TMp) control modem can be used to download firmware to just one tributary modem (Single) or to all of its tributary modems (Multiple). NOTE A Trellis Multipoint (TMp) tributary modem cannot download firmware to its control modem.
Page 80 COMSPHERE 392xPlus Modems Cloning a Single TMp Remote Choose DLL Type > Single Multiple Press the F1 key to select Single Clone Remote. Choose Address: " The address field (xxx) displays the network management address of the modem that receives the download.
Page 81 DCP Operation Cloning a Multiple TMp Remote Choose DLL Type > Single Multiple Press the F3 key to select Multiple Clone Remote. After completing this action, proceed to the next section titled Implementing a Clone Remote Operation. Viewing Multiple TMp Clone Results Choose DLL Type >...
Page 82: Implementing A Clone Remote Operation
COMSPHERE 392xPlus Modems Implementing a Clone Remote Operation WARNING The modem begins a transfer of its own program to the remote modem. This process takes the communication link out-of-service for a period of time depending on the data rate of the link. If the Clone Remote process is started and then interrupted, the remote modem is left in a partially programmed state in which its functional capabilities are limited to those required to initiate and complete another download attempt.
Page 83 If the Single download is unsuccessful, RemClone Failed appears on the LCD’s top line. Attempt another download from the local modem. If this fails, contact AT&T Paradyne’s Customer Assistance Center.
Page 84: Vf Thresholds Update
COMSPHERE 392xPlus Modems VF Thresholds Update The VF Thresholds Update function allows you to set the thresholds that determine the Health and Status alarm conditions for the VF parameters. Refer to Table 8 in the Device Health and Status section of this chapter for the available VF thresholds. To access VF_Thresh_Update from the Control branch, make the following selections: Control: <...
Page 85 DCP Operation NOTE Note that a warning ( ) appears on the second line of the screen if you enter an invalid VF threshold (out of range). You cannot save your edits until all thresholds are within their valid range. Refer to Table 3-8 for valid VF threshold ranges.
Page 86 COMSPHERE 392xPlus Modems If the edited VF thresholds are valid, the Save command stores them into nonvolatile memory. When the Save completes, the message Save Completed appears. Save VF Thresh Thd Out of Range If the edited VF threshold is invalid (out of range), the error message Thd Out of Range appears. This indicates the Save procedure was unsuccessful.
Page 87: Test Branch
DCP Operation Table 3-8 (2 of 2) Valid Ranges for VF Thresholds VF Thresholds Valid Ranges Default Values Frequency Offset 1 Hz to 15 Hz Above 4 Hz Phase Jitter 1 degree to 45 degrees Above 9 degrees Phase Hits 1 to 255 hits 20 hits per 15 minutes Impulse Hits...
Page 88: Abort
COMSPHERE 392xPlus Modems To access the Test branch from the Top-Level menu, make the following selections: Leased:28.8 Control Test Press the key until Test appears. Select Test. Abort Abort ends any test that is in progress and brings the modem back to the normal mode of operation.
Page 89: Self
If the modem passes the self-test, Pass appears on the LCD. If it fails, Failed appears. If the modem fails, contact your AT&T Paradyne service representative. If Invalid Command appears, the modem is operating on dial lines. If OtherTestActive appears, another test is in progress. If another test is in progress, select Abort to clear the current test and try again.
Page 90: Loc Analog Loop
COMSPHERE 392xPlus Modems Loc Analog Loop This test is not available when using V.34 modulation with the mux enabled. Loc Analog Loop performs a local analog loopback (CCITT V.54 Loop 3), Figure 3-4, that verifies modem operation as well as the connection between the DTE and modem. The modem must be offline and in Synchronous or Asynchronous Direct mode to perform this test, otherwise Invalid Command appears.
Page 91: Rem Digital Loop
DCP Operation NOTE For tributary modems only, the test is delayed 30 seconds to allow any outstanding network management messages to propagate upstream before the VF channel is interrupted by the test. The message Started appears on the LCD, and the Test LED lights for the duration of the test. If OtherTestActive appears on the LCD, another test is in progress.
Page 92 COMSPHERE 392xPlus Modems To access Rem_Digital_Loop from the Test branch, make the following selections: Test: Rem_Digital_Loop Press the key until Rem_Digital_Loop appears. Press any function key to start this test. Test:Remote Loop Started The message Started appears on the LCD, and the Test LED lights. If OtherTestActive appears on the LCD, another test is in progress.
Page 93: Loc Digital Loop
DCP Operation Loc Digital Loop Loc Digital Loop is issued by a local modem and forces it to loopback any data received from the remote modem (Figure 3-6 ). (This test operates the same as a CCITT V.54 Loop 2 except it is issued at your modem.) This is useful if a remote modem is incapable of initiating a remote digital loopback from its location.
Page 94: Pattern
COMSPHERE 392xPlus Modems Test:P1:Dig Loop Started The message Started appears on the LCD and the Test LED lights. The port field (for example, P1 for Port 1) displays the port that is currently selected. You may see P1, P2, P3, or P4. If OtherTestActive appears on the LCD, another test is in progress.
Page 95 DCP Operation Figure 3-8. Pattern Test and Digital Loopback Test Figure 3-9. End-to-End Pattern Test To access Pattern from the Test branch, make the following selections: Test: < Pattern Press the key until Pattern appears. Select Pattern to start this test. Pick Test Port >...
Page 96 COMSPHERE 392xPlus Modems Test:P1:Pattern Started The message Started appears on the LCD and the Test LED lights. The port field (for example, P1 for Port 1) displays the port that is currently selected. You may see P1, P2, P3, or P4. Test:Pattern >...
Page 97: Sub-Network Health And Status Branch
DCP Operation Sub-Network Health and Status Branch The Sub-Network Health and Status (SubHS) function is not available on multipoint tributary modems or with certain modulations (V.29, V.33, V.22bis, and V.27bis). The SubHS branch of the Top-Level menu allows you to display alarm conditions in downstream modems.
Page 98: Call Setup Branch
COMSPHERE 392xPlus Modems When you select SubHS, Displays the network management address of the downstream modem selected. yyyyyy Displays the status of the downstream modem. This message is updated every several seconds to display the latest status. MAJOR, MINOR, and STATUS display Health and Status alarm conditions;...
Page 99: Dial
DCP Operation To access the Call Setup branch from the Top-Level menu, make the following selections: Leased:28.8 Call_Setup Press the key until Call_Setup appears. Select Call Setup. Dial For dial backup applications, Dial allows you to dial any telephone number stored in directory locations 1–24.
Page 100: Disconnect
COMSPHERE 392xPlus Modems DialDirectory:01 Off Hook The Call Setup status Off Hook appears during the connection process. If the connection is successful, the modem is online and one of the Normal Operation status messages (Table 3-3) appears on the LCD. If the connection is not successful, the LCD displays one of the Call Failure status messages (Table 3-3).
Page 101: Answer
DCP Operation Answer For dial backup applications, Answer allows the modem to go off-hook, generate an answer tone, and begin the handshaking process with the calling modem. Use the Answer function when the Auto-Answer Ring Count configuration option is disabled. (Refer to the Line Dialer section in Chapter 4.) For leased backup applications, Answer allows the modem to begin the handshaking process with the remote modem.
Page 102 COMSPHERE 392xPlus Modems Under normal backup conditions, when a problem occurs on the primary leased line, the modems establish a connection over the backup network. Call Setup: Dial Standby When this occurs, the Dial Standby function appears on the LCD. If you select Dial Standby, the modem switches back to the primary leased-line while still maintaining the backup connection.
Page 103: Change Directory
DCP Operation Change Directory Change Directory allows you to enter or modify telephone numbers. The modem has nonvolatile memory locations that allow you to store up to 24 telephone numbers. Each directory location can accept up to 40 characters; this includes the telephone number and dial command modifiers. Any telephone number dialed using the DCP Dial command must appear in a directory location.
Page 104: Entering Telephone Numbers And Dial Command Modifiers Into Directory Locations
COMSPHERE 392xPlus Modems Entering Telephone Numbers and Dial Command Modifiers into Directory Locations The following example uses an empty directory location for describing how to enter a telephone number. If you want to change an existing telephone number in any of the 24 directory locations, follow the same procedures.
Page 105: Directory Status (Does Not Appear In North America)
DCP Operation Table 3-9 Valid Dial Command Modifiers Dial command modifiers are parameters entered in the dial command string which specify how, when, and what number to dial. The following is a list of parameters the 392x Plus modems recognize: —...
Page 106: Talk/Data Branch
COMSPHERE 392xPlus Modems Number Status 01:Allowed Select Nxt to display other directory locations. The status of a directory location can be: No Number The directory location is empty. Allowed The number in this directory location may be dialed at this time. Delayed The number in this directory location may be dialed later.
Page 107: Manual Dialing When The Remote Modem Is Configured For Auto-Answer
DCP Operation The following sections describe three uses of the Talk/Data function. Manual Dialing When the Remote Modem is Configured for Auto-Answer NOTE On the remote modem, the Line Current Disconnect configuration option (refer to the Line Dialer section in Chapter 4) must be set to Disable.
Page 108: Security Branch (Mux Disabled)
COMSPHERE 392xPlus Modems Manual Dialing When the Remote Modem is Configured for Manual Answer NOTE On both modems, the Line Current Disconnect configuration option (refer to the Line Dialer section in Chapter 4) must be set to Disable. If you are originating a call using a telephone and the remote modem is configured for Manual Answer, perform the following procedure.
Page 109: Remote Branch
DCP Operation Remote Branch The Remote branch of the Top-Level menu allows you to control the remote modem’s DCP using the local modem’s DCP. This function allows you to change configuration options and control test functions in a remote modem. Any changes made to configuration options while using the Remote branch are not saved until you exit the Remote branch.
Page 110 COMSPHERE 392xPlus Modems Remote DCP access is accomplished using either the primary or secondary channel (if available) of the VF line. Using the primary channel gives a much faster response time due to the higher data rate, but it also interrupts data flow because primary data is stopped when Remote mode is active. Once Remote mode is terminated, the primary channel is automatically made available for data transmission.
Page 111 DCP Operation For Trellis Multipoint (TMp) modems (control or tributary), you must specify the remote access password of the modem that will be accessed by the Remote function. The following display does not appear in point-to-point modems. Choose Password: " yyyyyyyy The password field (yyyyyyyy) displays the remote access password of the modem to be accessed by the Remote function.
Page 112 COMSPHERE 392xPlus Modems Leased:28.8 Control ExitRem If the remote modem accepts the password and the entry is successful, the Top-Level menu of the remote modem appears on the local modem’s LCD. An appears in the upper right-hand corner indicating that what is displayed on your LCD is actually the Top-Level menu of the remote 392xPlus modem.
Page 113 The Diagnostic Control Panel Access section of this document is not available for viewing online due to its security-sensitive contents. To order this manual, please call 1-800-5454-2354, extension 2222. Intentional customers, call your local AT&T Paradyne Sales Representative. 3920-A2-GN31-10 April 1995...
Page 114: Dcp Configuration
DCP Configuration Overview ........... . Configure Branch .
Page 115 COMSPHERE 392xPlus Modems Factory is a read-only (unchangeable) configuration area containing six sets of predefined configuration options labeled Sync Leased, Async Leased, TMp (Trellis Multipoint), Async Dial, Sync Dial, and UNIX Dial. If Sync Leased or Async Leased is selected, you must choose either Answer or Originate mode.
Page 116: Configure Branch
DCP Configuration Configure Branch The Configure branch of the Top-Level menu contains all of the modem’s configuration options (straps) which determine how the modem operates. These configuration options are accessed by scrolling down and across various levels of the Configure branch. “Status”...
Page 117: Editing And Saving A Configuration Option
COMSPHERE 392xPlus Modems The Configure branch consists of the following three levels: Ld EditArea frm. Allows the selection of the Active (Operating), Active (Saved), Customer 1, Customer 2, and Factory configuration areas. Choose Function. Allows you to make changes (Edit) to existing configuration options or write (Save) these changes to either the Active (Saved), Customer 1, or Customer 2.
Page 118 DCP Configuration Ld Fact Preset: > Sync_Leased Select Sync_Leased. Choose Mode: Answer Originate Select Answer. Choose Function: Edit Save Select Edit. Edit StrapGroup: > DTE_Interface Edit StrapGroup Test Misc Scroll across the LCD and select the Misc configuration options group. 3920-A2-GN31-10 April 1995...
Page 119 COMSPHERE 392xPlus Modems StrapsWhenDisc > No_Change RemAccssPasswrd: " 00000000 Select Nxt until RemAccssPasswrd appears. RemAccssPasswrd: " 10000000 " Select the F2 ( ) key to increment password values. RemAccssPasswrd: " 10000000 Press the key to move the cursor to the next position. RemAccssPasswrd: "...
Page 120: Summary
DCP Configuration To save the new password to a configuration area, make the following selections: RemAccssPasswrd: " 12345678 Press the key to scroll up (twice). Choose Function Edit Save Select Save. Sav EditArea to > Active(Saved) Select a configuration area (Active (Saved), Customer 1, or Customer 2) to save the changes. Select the key to exit to the Top-Level menu or select the key to remain in the Configure...
Page 121: Configuration Tables
COMSPHERE 392xPlus Modems Configuration Tables The modem’s configuration options are arranged into six groups if the multiplexer (mux) is enabled, or nine groups if the mux is disabled. When using configuration option tables, be sure you are using the correct group (mux enabled or mux disabled). Failure to do this may lead to erroneous assumptions about the functionality of certain configuration options.
Page 122 DCP Configuration 3920-A2-GN31-10 April 1995...
Page 123: Dte Interface - Mux Enabled
COMSPHERE 392xPlus Modems DTE Interface — Mux Enabled The DTE Interface configuration options contain EIA-232-D (CCITT V.24) and asynchronous character format information essential for maintaining a connection and for transmitting data between the DTEs and the modem. Table 4-1 shows each DTE Interface configuration option as it appears on the LCD, with the Sync Leased factory default setting (the default value if the modem is newly installed) shown following the colon ( : ) on the first line and with all available selections listed on the second line.
Page 124 DCP Configuration Table 4-1 (2 of 9) DTE Interface Configuration Options — Mux ENABLED Bakup_TXClk_Src: Internal Nxt Internal RXC_Loop Port1 Port2 Port3 Port4 This configuration option only appears when Dual_Leased_Ln is configured for Enable. Backup Transmit Clock Source. Selects the clock reference source when operating in the Dual Leased Line Mode. This is a special mode in which one leased line is used to back up another.
Page 125 COMSPHERE 392xPlus Modems Table 4-1 (3 of 9) DTE Interface Configuration Options — Mux ENABLED Port Rate Sub-Group (One for Each Port) NOTE: The Port Rate Sub Group configuration options are not available in Digital Bridge mode. Modem MSD: Disable Nxt/End Disable Enable This configuration option only appears when NetworkPosition is configured for Tributary.
Page 126 DCP Configuration Table 4-1 (4 of 9) DTE Interface Configuration Options — Mux ENABLED Rate at 7200 Nxt Disable 7200 4800 2400 1200 Rate at 7200. When the modem rate is 7200 bps the port rate will be as selected by this configuration option (Disable or 7200 to 1200).
Page 127 COMSPHERE 392xPlus Modems Table 4-1 (5 of 9) DTE Interface Configuration Options — Mux ENABLED Asyn OverSpeed: 1.0 % End 1.0 % 2.3 % This configuration option only appears when Async/Sync Mode is configured for Async. Asynchronous Overspeed. Provides rate compensation for asynchronous DTEs that may be operating at a slightly higher rate than the asynchronous interface of the port.
Page 128 DCP Configuration Table 4-1 (6 of 9) DTE Interface Configuration Options — Mux ENABLED RTS Action: Stndrd_RS232 Nxt Stndrd_RS232 Ignore Sim_Cntl_Car Request-to-Send Action. RTS is a signal from the DTE indicating the DTE has data to send. Standard RS232 – Allows the DTE to control RTS to the modem in normal EIA-232-D operation. RTS must be ON for the DTE to transmit to the modem.
Page 129 COMSPHERE 392xPlus Modems Table 4-1 (7 of 9) DTE Interface Configuration Options — Mux ENABLED RTS/CTS Delay: 0msec Nxt 0msec 10msec 50msec 150msec 600msec 5 Request-to-Send/Clear-to-Send Delay. RTS/CTS Delay sets the delay time between the modem receiving RTS from the DTE and the modem sending CTS to the DTE.
Page 130 DCP Configuration Table 4-1 (8 of 9) DTE Interface Configuration Options — Mux ENABLED CT111 Control: Disable Nxt Disable Enable This configuration option does not appear when V.34 is enabled for a leased or dial line. CT111 Control. Used in conjunction with CT111 Rate Control. (Refer to the Mux Sub-Group section of this table.) Allows the DTE to control modem rate via Pin 23 of the EIA-232-D interface.
Page 131 COMSPHERE 392xPlus Modems Table 4-1 (9 of 9) DTE Interface Configuration Options — Mux ENABLED Extend Main Ch.: Disable Nxt Disable Enable Primary data can only be extended one link. Extend Main Channel. Supports extended diagnostics. Specifies whether there is main (primary) channel connectivity between the modem’s DTE ports and the DTE ports of modems one level below (downstream) or above (upstream) in the diagnostic network.
Page 132: Line Dialer - Mux Enabled
DCP Configuration Line Dialer — Mux Enabled The Line Dialer configuration options establish parameters used by the modem to answer or originate calls. Table 4-2 shows each Line Dialer configuration option as it appears on the LCD, with the Sync Leased factory default setting (the default value if the modem is just being installed) shown following the colon ( : ) on the first line and with all available selections listed on the second line.
Page 133 COMSPHERE 392xPlus Modems Table 4-2 (2 of 3) Line Dialer Configuration Options — Mux ENABLED NoAnswer Timout: 45sec Nxt 45sec 30sec 60sec No Answer Abort Time-out. Determines the number of seconds an originating modem waits before abandoning a call attempt when no answer tone is received. NOTE: The range of allowable values may be restricted in some countries.
Page 134 DCP Configuration Table 4-2 (3 of 3) Line Dialer Configuration Options — Mux ENABLED No Data Disc: Disable Nxt Disable 10min 30min 60min No Data Disconnect. Forces the modem to disconnect if no data is transmitted and received within a specified amount of time.
Page 135: Dial Line - Mux Enabled
This configuration option is ignored unless Dial Line Rate is 4800(V32b). V.32bis Override. Activates the AT&T Paradyne Point-to-Point Diagnostic 2400 bps modulation. Allows the modem to use a non-standard, point-to-point modulation capable of secondary channel diagnostics while running at 2400 bps.
Page 136 DCP Configuration Table 4-3 (2 of 2) Dial Line Configuration Options — Mux ENABLED Dial Tx Level: Permissv(–9) Nxt Permissv(–9) –10 –11 –12 –13 –14 –15 –16 –17 –18 –19 –20 –21 –22 –23 –24 –25 –26 –27 –28 –29 –30 –31 –32 Dial Transmit Level.
Page 137: Leased Line - Mux Enabled
This configuration option is ignored unless Leased-Line Rate is 4800(V32b). V.32bis Override. Activates the AT&T Paradyne Point-to-Point Diagnostic 2400 bps modulation. Allows the modem to use a non-standard, point-to-point modulation capable of secondary channel diagnostics while running at 2400 bps.
Page 138 DCP Configuration Table 4-4 (2 of 3) Leased Line Configuration Options — Mux ENABLED Leased Tx Level: 0 Nxt 0 –1 –2 –3 – 4 – 5 – 6 –7 – 8 –9 –10 –11 –12 –13 –14 –15 Leased Transmit Level. Selects the modem’s transmit power level over leased-lines. The transmit output level can be selected in 1 dBm decrements from 0 dBm to –15 dBm.
Page 139 COMSPHERE 392xPlus Modems Table 4-4 (3 of 3) Leased Line Configuration Options — Mux ENABLED SpecialStandby: Disable Nxt Disable Enable This configuration option is only available if Automatic Dial Standby is configured for 15min, 1hr, 4hr or Test(2min) and Leased mode is configured for Originate mode, if Automatic Dial Standby is configured for Adv15min, Adv30min, Adv1hr or TestAdv(2min).
Page 140: Test - Mux Enabled
DCP Configuration Test — Mux Enabled The Test configuration option determines the duration of a test. Table 4-5 shows the Test configuration option as it appears on the LCD, with the Sync Leased factory default setting (the default value if the modem is just being installed) shown following the colon ( : ) on the first line and with all available selections listed on the second line.
Page 141: Misc - Mux Enabled
COMSPHERE 392xPlus Modems Misc — Mux Enabled The Miscellaneous configuration options determine specifics for various functions, including network management parameters and remote modem access. Table 4-6 shows each Misc (Miscellaneous) configuration option as it appears on the LCD, with the Sync Leased factory default setting (the default value if the modem is just being installed) shown following the colon ( : ) on the first line and with all available selections listed on the second line.
Page 142 DCP Configuration Table 4-6 (2 of 3) Miscellaneous Configuration Options — Mux ENABLED Dir#1_Callback: Disable Nxt Disable Enable Directory Location 1 Callback. This configuration option controls whether or not the modem’s single number callback function is used. Disable – Modem does not use the single number callback function. Enable –...
Page 143 COMSPHERE 392xPlus Modems Table 4-6 (3 of 3) Miscellaneous Configuration Options — Mux ENABLED Diag Connection: Modem(DC) Nxt Modem(DC) NMS(CC) Disable This configuration option does not appear when the LeaseLine Rate is configured for TMp and NetworkPosition is configured for Tributary. Diagnostic Connection.
Page 144: Mux Disabled
DCP Configuration Mux Disabled With the mux disabled, the modem’s configuration options are arranged into nine groups based on functionality: DTE Interface — Mux Disabled (Table 4-7) DTE Dialer — Mux Disabled (Table 4-8) Line Dialer — Mux Disabled (Table 4-9) Dial Line —...
Page 145: Dte Interface - Mux Disabled
COMSPHERE 392xPlus Modems DTE Interface — Mux Disabled The DTE Interface configuration options contain EIA-232-D (CCITT V.24) and asynchronous character format information essential for maintaining a connection and for transmitting data between the DTE and the modem. Table 4-7 shows each DTE Interface configuration option as it appears on the LCD, with the Sync Leased factory default setting (the default value if the modem is just being installed) shown following the colon ( : ) on the first line and with all available selections listed on the second line.
Page 146 DCP Configuration Table 4-7 (2 of 8) DTE Interface Configuration Options — Mux DISABLED Asyn Parity Bit: None Nxt None Even Odd Mark Space This configuration option only appears when Async/Sync Mode is configured for Async. Asynchronous Parity Bit. Determines the type of asynchronous parity bit. The parity of the DTE must match the parity of the modem.
Page 147 COMSPHERE 392xPlus Modems Table 4-7 (3 of 8) DTE Interface Configuration Options — Mux DISABLED DTR Action: Ignore Nxt Ignore Stndrd_RS232 CntrlsOnHook CntrlsTxMute Data Terminal Ready Action. DTR is a signal from the DTE to the modem indicating that the DTE is connected and ready for operation.
Page 148 DCP Configuration Table 4-7 (4 of 8) DTE Interface Configuration Options — Mux DISABLED RTS Action: Stndrd_RS232 Nxt Stndrd_RS232 Ignore Sim_Cntl_Car Cntl_Car Request-to-Send Action. RTS is a signal from the DTE indicating the DTE has data to send. Standard RS232 – Allows the DTE to control RTS to the modem in normal EIA-232-D operation. RTS must be ON for the DTE to transmit to the modem.
Page 149 COMSPHERE 392xPlus Modems Table 4-7 (5 of 8) DTE Interface Configuration Options — Mux DISABLED CTS Control: Stndrd_RS232 Nxt Stndrd_RS232 Forced_On WinkWhenDisc Follows_DTR Follows_RTS Clear-to-Send Control. CTS is a signal from the modem to the DTE indicating that it can accept data from the DTE. Standard RS232 –...
Page 150 DCP Configuration Table 4-7 (6 of 8) DTE Interface Configuration Options — Mux DISABLED LSD Control: Stndrd_RS232 Nxt Stndrd_RS232 Forced_On WinkWhenDisc Follows_DTR Sim_Cntl_Car =DTR/DiscOFF Line Signal Detect Control. LSD is a signal indicating that the carrier signal is being received from the remote modem. It is normally turned OFF to the DTE when the power level of the received carrier signal drops below the carrier detect threshold.
Page 151 COMSPHERE 392xPlus Modems Table 4-7 (7 of 8) DTE Interface Configuration Options — Mux DISABLED Bakup_TXClk_Src: Internal Nxt Internal External RXC_Loop This configuration option only appears in customized installations in which the Dual_Leased_Ln is configured for Enable and Async/Sync Mode is Sync. Backup Transmit Clock Source.
Page 152 DCP Configuration Table 4-7 (8 of 8) DTE Interface Configuration Options — Mux DISABLED Extend Main Ch.: Disable Nxt Disable Enable Primary data can only be extended one link. Extend Main Channel. This configuration option supports extended diagnostics. Specifies whether there is main (primary) channel connectivity between the modem’s DTE ports and the DTE ports of modems one level below (downstream) or above (upstream) in the diagnostic network.
Page 153: Dte Dialer - Mux Disabled
COMSPHERE 392xPlus Modems DTE Dialer — Mux Disabled The DTE Dialer configuration options establish the DTE-to-modem protocol for call establishment and control. Table 4-8 shows each DTE Dialer configuration option as it appears on the LCD, with the Sync Leased factory default setting (the default value if the modem is just being installed) shown following the colon ( : ) on the first line and with all available selections listed on the second line.
Page 154 DCP Configuration Table 4-8 (2 of 5) DTE Dialer Configuration Options — Mux DISABLED AT Escape Char: 043 ASCI " 043 ASCI This configuration option only appears when DTE Dialer Type is configured for AT. AT Escape Character. The escape sequence (+++) allows you to move from Data mode to Command mode. Use the ATO command to return to Data mode.
Page 155 COMSPHERE 392xPlus Modems Table 4-8 (3 of 5) DTE Dialer Configuration Options — Mux DISABLED Linefeed Char: 010 ASCI " 010 ASCI This configuration option only appears when DTE Dialer Type is configured for AT. Line Feed Character. Sets the character used to perform a line feed in Command mode for responses from the modem. The AT command is S-Register S4= n , where n is a value from 0 to 127.
Page 156 DCP Configuration Table 4-8 (4 of 5) DTE Dialer Configuration Options — Mux DISABLED ResultCode Form: Words Nxt Words Numbers (1) Numbers (2) This configuration option only appears when DTE Dialer Type is configured for AT. Result Codes Format. Controls whether or not result codes appear as words or as numeric codes. Some DTEs do not recognize Result Codes as words;...
Page 157 COMSPHERE 392xPlus Modems Table 4-8 (5 of 5) DTE Dialer Configuration Options — Mux DISABLED V25bis IdleFill: Mark Nxt Mark Flag This configuration option only appears when DTE Dialer is configured for V.25bis HDLC. V.25bis Idle Fill. Determines whether a mark or flag is used as an idle fill character for the DTE. The modem responds to the DTE using the same idle fill.
Page 158: Line Dialer - Mux Disabled
DCP Configuration Line Dialer — Mux Disabled The Line Dialer configuration options establish parameters used by the modem to answer or originate calls. Table 4-9 shows each Line Dialer configuration option as it appears on the LCD, with the Sync Leased factory default setting (the default value if the modem is just being installed) shown following the colon ( : ) on the first line and with all available selections listed on the second line.
Page 159 COMSPHERE 392xPlus Modems Table 4-9 (2 of 4) Line Dialer Configuration Options — Mux DISABLED BusyTone Detect: Enable Nxt Enable Disable Busy Tone Detect. Sets the modem to monitor for Busy Tone (Enable) or ignore Busy Tone (Disable). NOTE: This configuration option is normally enabled; however, if the modem receives false busy tones, this configuration option can be disabled and the modem ignores all busy tones.
Page 160 DCP Configuration Table 4-9 (3 of 4) Line Dialer Configuration Options — Mux DISABLED Long Space Disc: Enable Nxt Enable Disable Long Space Disconnect. Determines the modem’s response to a continuous spacing condition sent from the remote modem before it goes on-hook. Issuing a long space is one method of disconnecting a call. Enable –...
Page 161 COMSPHERE 392xPlus Modems Table 4-9 (4 of 4) Line Dialer Configuration Options — Mux DISABLED Auto Make Busy: Disable Nxt Disable Enable This option is only valid on Model 3921 Plu s. Automatic Make Busy. Forces the modem to go off-hook under the following conditions: if a local analog loopback is performed, a self-test is performed, or if the modem is switched to the service line.
Page 162: Dial Line - Mux Disabled
DCP Configuration Dial Line — Mux Disabled The Dial Line configuration options are used to configure the modem for operation over dial lines. Table 4-10 shows each Dial Line configuration option as it appears on the LCD, with the Sync Leased factory default setting (the default value if the modem is just being installed) shown following the colon ( : ) on the first line and with all available selections listed on the second line.
Page 163 This configuration option is ignored unless Dial Line Rate is 4800(V32b). V.32bis Override. Activates the AT&T Paradyne Point-to-Point Diagnostic 2400 bps modulation. Allows the modem to use a non-standard, point-to-point modulation capable of secondary channel diagnostics while running at 2400 bps.
Page 164 DCP Configuration Table 4-10 (3 of 3) Dial Line Configuration Options — Mux DISABLED V22b Guard Tone: Disable Nxt Disable 550Hz 1800Hz This configuration option only appears when Dial Line Rate is configured for V.22bis or V.22 data rate, or when Automode is configured for Enable.
Page 165: Leased Line - Mux Disabled
COMSPHERE 392xPlus Modems Leased Line — Mux Disabled The Leased Line configuration options only appear when the Sync Leased factory preset template is selected. They are used to configure the modem for operation over leased lines. Table 4-11 shows each Leased Line configuration option as it appears on the LCD, with the Sync Leased factory default setting (the default value if the modem is just being installed) shown following the colon ( : ) on the first line and with all available selections listed on the second line.
Page 166 This configuration option is ignored unless Leased-Line Rate is 4800(V32b). V.32bis 4800 Override. Activates the AT&T Paradyne Point-to-Point Diagnostic 2400 bps modulation. Allows the modem to use a non-standard, point-to-point modulation capable of secondary channel diagnostics while running at 2400 bps.
Page 167 COMSPHERE 392xPlus Modems Table 4-11 (3 of 5) Leased Line Configuration Options — Mux DISABLED Leased Tx Level: 0 Nxt 0 –1 –2 –3 – 4 – 5 – 6 –7 – 8 – 9 –10 –11 –12 –13 –14 –15 Leased Transmit Level.
Page 168 DCP Configuration Table 4-11 (4 of 5) Leased Line Configuration Options — Mux DISABLED SpecialStandby: Disable Nxt Disable Enable This configuration option only appears when Automatic Dial Standby is configured for 15min, 1hr, 4hr or Test(2min) and Leased mode is configured for Originate mode, when Automatic Dial Standby is configured for Adv15min, Adv30min, Adv1hr or TestAdv(2min).
Page 169 COMSPHERE 392xPlus Modems Table 4-11 (5 of 5) Leased Line Configuration Options — Mux DISABLED V29 Link Config: PointToPoint Nxt PointToPoint Multipoint This configuration option only appears when Leased-Line Rate is configured for V29. V.29 Link Configuration. Selects point-to-point or multipoint operation. NOTE: Remote mode and the Cloning function are not available when configured for V.29 multipoint.
Page 170: V.42/Mnp/Buffer - Mux Disabled
DCP Configuration V.42/MNP/Buffer — Mux Disabled V.42/MNP/Buffer configuration options determine the type of error correction and flow control used by the modems and attached DTEs. Some choices within this group may not appear depending upon how previous configuration options have been selected. If the Async/Sync Mode configuration option is set for synchronous operation (refer to the DTE Interface configuration options group), then the V.42/MNP/Buffer group does not appear on the LCD.
Page 171 COMSPHERE 392xPlus Modems Table 4-12 (2 of 6) V.42/MNP/Buffer Configuration Options — Mux DISABLED Err Contrl Mode: V.42/MNPorBfr (Cont.) The AT command for Buffer Mode is \N0. The AT command for Direct Mode is \N1. The AT command for MNP or Disconnect is \N2. The AT command for MNP or Buffer is \N3.
Page 172 DCP Configuration Table 4-12 (3 of 6) V.42/MNP/Buffer Configuration Options — Mux DISABLED EC Fallbck Char: 013 ASCI " 013 ASCI This configuration option only appears when Async/Sync Mode is configured for Async, and EC Negotiate Buffer is not configured for Disable. Error Control Fallback Character.
Page 173 COMSPHERE 392xPlus Modems Table 4-12 (4 of 6) V.42/MNP/Buffer Configuration Options — Mux DISABLED XON/XOFF Psthru: Disable Nxt Disable Enable This configuration option only appears when Async/Sync Mode is configured for Async, and Flow Control of Modem is configured for XON/XOFF Psthru. XON/XOFF Passthrough.
Page 174 DCP Configuration Table 4-12 (5 of 6) V.42/MNP/Buffer Configuration Options — Mux DISABLED Send Break Cntl: Data_First End Data_First Break_First This configuration option only appears when Async/Sync Mode is configured for Async, and Error Control Mode is not configured for DirectMode. Send Break Control.
Page 175 COMSPHERE 392xPlus Modems Table 4-12 (6 of 6) V.42/MNP/Buffer Configuration Options — Mux DISABLED CellularEnhance: Disable Nxt Disable Enable This configuration option only appears when Async/Sync Mode is configured for Async, and Error Control Mode is configured for V42/MNPorBfr, V42/MNPorDsc, LAPM_or_Disc, or LAPM_or_Bufr. Cellular Enhancement.
Page 176: Test - Mux Disabled
DCP Configuration Test — Mux Disabled The Test configuration options determine specifics, such as the duration of a test, for the various diagnostic tests available to the modem. Table 4-13 shows each Test configuration option as it appears on the LCD, with the Sync Leased factory default setting (the default value if the modem is just being installed) shown following the colon ( : ) on the first line and with all available selections listed on the second line.
Page 177 COMSPHERE 392xPlus Modems Table 4-13 (2 of 2) Test Configuration Options — Mux DISABLED V54 Address: Disable Nxt Disable (Address Values) V.54 Address. Determines which remote 392x Plus modem is placed into a remote loopback test. This test can be either a remote digital loopback or local analog loopback.
Page 178: Misc - Mux Disabled
DCP Configuration Misc — Mux Disabled The Miscellaneous configuration options determine specifics for various functions, including network management parameters and remote modem access. Table 4-14 shows each Misc (Miscellaneous) configuration option as it appears on the LCD, with the Sync Leased factory default setting (the default value if the modem is just being installed) shown following the colon ( : ) on the first line and with all available selections listed on the second line.
Page 179 COMSPHERE 392xPlus Modems Table 4-14 (2 of 3) Miscellaneous Configuration Options — Mux DISABLED Access frm Remt: Enable Nxt Enable Disable Access from Remote. Determines if your modem’s DCP can be accessed by a remote modem via the VF line. CAUTION: If this configuration option is disabled, the modem cannot be accessed by another modem.
Page 180: Security - Mux Disabled
DCP Configuration Table 4-14 (3 of 3) Miscellaneous Configuration Options — Mux DISABLED NetworkPosition: Tributary End Tributary Control Network Position Identification. Each modem must be identified either as a control modem or a tributary modem. NOTE: Changes to this configuration option will cause the modem to reset. NOTE: This configuration option is only applicable for leased-line network management applications.
Page 181: At Command Set And S-Registers
AT Command Set and S-Registers Overview ........... . Operating Modes .
Page 182: Command Guidelines
COMSPHERE 392xPlus Modems Escape Sequence and Escape Guard Time The escape sequence is only issued when the modem is online and in Data mode. The 392xPlus modems use three consecutive plus ( + ) characters as the escape sequence. (To change this value, refer to S-Register S2 discussed later in Table 5-3 in the S-Register Format section.) To prevent the modem from interpreting an embedded + + + in data as an escape sequence, the Escape Guard Time value determines the length of the pause before and after the escape sequence...
Page 183: Result Codes
AT Command Set and S-Registers Result Codes Table 5-1 lists all valid result codes for the 392xPlus modems. Table 5-1 (1 of 2) Result Codes Numbers Numbers Word Description Command executed CONNECT Modem connected to line RING Modem receiving a ring voltage from the VF line NO CARRIER Modem lost carrier signal, does not detect carrier signal, or does not detect answer tone...
Page 184 COMSPHERE 392xPlus Modems Table 5-1 (2 of 2) Result Codes Numbers Numbers Word Description CONNECT 7200/ EC**** Connection at 7200 bps with error control CONNECT 1200/ EC*** Connection at 1200 bps with error control CONNECT 38400** Connection at 38,400 bps CONNECT 19200/ EC**** Connection at 19,200 bps with error control CONNECT 57600**...
Page 185: At Command List
AT Command Set and S-Registers AT Command List AT commands are issued from an asynchronous DTE, such as a PC, and control the modem’s operation and software configuration. AT commands are only applicable when the DTE Dialer Type configuration option is set for AT. (Refer to the &Mn and &Qn commands.) Table 5-2 lists all AT commands supported by the 392xPlus modems.
Page 186 COMSPHERE 392xPlus Modems Table 5-2 (1 of 9) 392x Plus AT Commands DCP LCD Description Command Command Sequence Repeat Last Command. Reexecutes last command string. (Not to be preceded Call Setup\ with AT or followed by pressing the Return key.) Answer Answer Mode.
Page 187 AT Command Set and S-Registers Table 5-2 (2 of 9) 392x Plus AT Commands DCP LCD Description Command Command Sequence DS= n Dial Stored Number. Dials the number stored in Location n (1–24). (To store a Call Setup\Dial\ telephone number, refer to the & Zn=x command.) Dial Directory: Command Character Echo.
Page 188 COMSPHERE 392xPlus Modems Table 5-2 (3 of 9) 392x Plus AT Commands DCP LCD Description Command Command Sequence Extended Result Code, Dial Tone Detect, and Busy Tone Detect Configuration Extended Result Options. Code: Configure\Edit\ Extended Dial Tone Busy Tone DTE Dialer Result Code: Detect: Detect:...
Page 189 AT Command Set and S-Registers Table 5-2 (4 of 9) 392x Plus AT Commands DCP LCD Description Command Command Sequence &C n LSD Control. Configure\Edit\ DTE Interface &C0 Forced On. LSD ON at all times. &C1 Standard RS232. LSD is ON when the remote modem’s carrier signal is detected.
Page 190 COMSPHERE 392xPlus Modems Table 5-2 (5 of 9) 392x Plus AT Commands DCP LCD Description Command Command Sequence &G n V.22bis Guard Tone. Configure\Edit\ Dial Line &G0 Disable. &G1 550 Hz. &G2 1800 Hz. NOTE: The V.22bis Guard Tone cannot be disabled in some countries. &I n Dial Transmit Level.
Page 191 AT Command Set and S-Registers Table 5-2 (6 of 9) 392x Plus AT Commands DCP LCD Description Command Command Sequence &M n and Async/Sync Mode and DTE Dialer Type. Configure\Edit\ &Q n DTE Dialer &M0, &Q0 Modem operates in Asynchronous mode using AT Command protocol.
Page 192 COMSPHERE 392xPlus Modems Table 5-2 (7 of 9) 392x Plus AT Commands DCP LCD Description Command Command Sequence &T n Tests. Test &T0 Abort. Stops any test in progress. &T4 and &T5: &T1 Local Analog Loop. Configure\Edit\ &T2 Pattern. Transmits and receives a 511 Bit Error Rate Test (BERT). Tests &T3 Local Digital Loopback test.
Page 193 AT Command Set and S-Registers Table 5-2 (8 of 9) 392x Plus AT Commands DCP LCD Description Command Command Sequence &Z n=x Store Telephone Numbers. Modem saves the telephone numbers and dial Call Setup\ command modifiers (if any) entered for x (up to 40 characters in length) in Change Directory Directory Location n (1–24).
Page 194 COMSPHERE 392xPlus Modems Table 5-2 (9 of 9) 392x Plus AT Commands DCP LCD Description Command Command Sequence \N n Error Control Mode. Configure\Edit\ V42/MNP/Buffer Buffer Mode. Direct Mode. MNP or Disconnect. MNP or Buffer. V.42/MNP or Disconnect. V.42/MNP or Buffer. \Q n Flow Control of DTE, Flow Control of Modem.
Page 195: S-Register List
AT Command Set and S-Registers S-Register List S-Registers affect the operating parameters of the 392xPlus modems. S-Registers are only applicable when the DTE Dialer Type configuration option is set for AT. (Refer to the &Mn and &Qn commands.) Table 5-3 lists all S-Registers supported by the 392xPlus modems. The first column lists the S-Register.
Page 196 COMSPHERE 392xPlus Modems Table 5-3 (1 of 12) 392x Plus S-Registers DCP LCD S-Register Description Command Sequence Auto-Answer Ring Number . Register determines number of rings the modem Configure\Edit\ will count before automatically answering a call. Line Dialer Enter zero (0) if you do not want the modem to automatically answer any calls. Otherwise, enter a value from 1–255 for the number of rings to count before answering.
Page 197 AT Command Set and S-Registers Table 5-3 (2 of 12) 392x Plus S-Registers DCP LCD S-Register Description Command Sequence Escape Guard Time. Register sets the value (in 20-millisecond increments) for Configure\Edit\ the required pause before and after the escape sequence is issued. The guard DTE Dialer time prevents the modem from interpreting data as the escape sequence characters.
Page 198 COMSPHERE 392xPlus Modems Table 5-3 (3 of 12) 392x Plus S-Registers DCP LCD S-Register Description Command Sequence Dial-Line Rate. Register determines the modem’s data rate and modulation Configure\Edit\ scheme for operation on dial lines. Dial Line Register has the following values: 1 = 14,400 (V.32bis) 2 = 12,000(V.32bis) 3 = 9600 (V.32bis)
Page 199 AT Command Set and S-Registers Table 5-3 (4 of 12) 392x Plus S-Registers DCP LCD S-Register Description Command Sequence Leased-Line Rate. Register determines the modem’s data rate and modulation Configure\Edit\ scheme for operation on either 2-wire or 4-wire leased lines in either Answer Leased Line or Originate mode.
Page 200 COMSPHERE 392xPlus Modems Table 5-3 (5 of 12) 392x Plus S-Registers DCP LCD S-Register Description Command Sequence Auto Dial Backup. Register determines if the modem performs an automatic Configure\Edit\ dial backup if the leased lines fail. Leased Line Register has the following values: 0 = Disable 1 = Enable The factory setting is Disable.
Page 201 AT Command Set and S-Registers Table 5-3 (6 of 12) 392x Plus S-Registers DCP LCD S-Register Description Command Sequence DTE LL (CT141). Register determines if the modem performs a local analog Configure\Edit\ loopback if it receives a CT141 signal from the DTE. Tests Register has the following values: 0 = Disable...
Page 202 COMSPHERE 392xPlus Modems Table 5-3 (7 of 12) 392x Plus S-Registers DCP LCD S-Register Description Command Sequence CT111 Rate Control. Register determines if CT111 Rate is disabled, set for Configure\Edit\ Fallback 1 or Fallback 2. DTE Interface CT111 Rate allows the DTE to control modem rate via Pin 23 of the EIA-232-D interface.
Page 203 AT Command Set and S-Registers Table 5-3 (8 of 12) 392x Plus S-Registers DCP LCD S-Register Description Command Sequence NMS Call Messages. Register determines if the modem sends information Configure\Edit\ regarding status (Call Progress) and/or sends summarized call statistics (Call Misc Connect) to the 6700 Series Network Management System (NMS).
Page 204 COMSPHERE 392xPlus Modems Table 5-3 (9 of 12) 392x Plus S-Registers DCP LCD S-Register Description Command Sequence Network Position Identification. Register identifies each modem as either a Configure\Edit\ control or tributary modem. Misc Register has the following values: 0 = Tributary 1 = Control The factory setting is Tributary.
Page 205 AT Command Set and S-Registers Table 5-3 (10 of 12) 392x Plus S-Registers DCP LCD S-Register Description Command Sequence Fast Disconnect. Register allows the modem to disconnect immediately after Configure\Edit\ receiving a disconnect command from a local DTE or its own diagnostic Line Dialer control panel.
Page 206 COMSPHERE 392xPlus Modems Table 5-3 (11 of 12) 392x Plus S-Registers DCP LCD S-Register Description Command Sequence Cellular Enhancement. Register allows the modem to use non-standard Configure\Edit\ techniques to enhance V.42 operation for cellular applications. It is still V42/MNP/Buffer compatible, however, with modems which do not have the cellular enhancement implemented or enabled.
Page 207 AT Command Set and S-Registers Table 5-3 (12 of 12) 392x Plus S-Registers DCP LCD S-Register Description Command Sequence Trellis Multipoint (TMp) Tx Preemphasis. Provides amplification for Configure\Edit\ frequencies above the carrier frequency to compensate for high frequency line Leased attenuation.
Page 208: Dial Access Security
Dial Access Security information is available in the COMSPHERE 392xPlus Modems Models 3920Plus and 3921Plus Installation and Operation Manual, Document Number 3920-A2-GN31. To order the Installation and Operation Manual, please call 1-800-545-2354, extension 2222. International customers, call your local AT&T Paradyne Sales representative. 3920-A2-GN31-10 April 1995...
Page 209: Overview
Menu Tree Overview ........... . Overview Pages A-2 and A-3 provide a menu tree for the 392xPlus modems.
Page 210 COMSPHERE 392xPlus Modems Displays current status of modem along with “Status” data rate and error control mode. to next page Status Configure PList (Tributary only) Display Clear Change Acquire Ld EditArea frm: Active Delete Activ (Operating) Customer1 Factory Skip Active (Saved) Customer2 Sync_Dial Sync_Leased...
Page 211 Menu Tree (Mux Disabled from previous page only) Control SubHS Call_Setup Remote Tlk/Data (Dial Test Backup Security only) Choose Address Answer Change_Directory Dial (TMP Control only) Dial_Standby Disconnect Choose Password Return_to_Dial (TMP only) Directory Locations 1 – 24 (Not in TMp Trib) Secondary Prim (data blckd)
Page 212: Troubleshooting
LCD does not display information. Make sure the power supply is connected to the dc power receptacle on the modem. If the Power LED and/or LCD do not operate, contact your AT&T Paradyne service representative. A problem is suspected after the Perform a self-test via the modem’s DCP or type AT&T9 if using AT commands.
Page 213 COMSPHERE 392xPlus Modems Table B-2 Leased-Line Operation Symptom Action The modems do not train-up on Verify that the correct cabling is used for your application. Refer to Chapter 2, leased lines. Modem Installation . Verify that one modem is configured for Answer mode and the other is configured for Originate mode.
Page 214 Troubleshooting Table B-4 Modem — DTE Connection Symptom Action The modem does not accept or echo Verify that the cable between the Async port of the DTE and the modem is a back AT commands. standard RS-232 cable. (Null modem cables, also known as crossover cables, do not work in this application.) Verify that the Command Character Echo configuration option is enabled.
Page 215 COMSPHERE 392xPlus Modems Table B-5 (1 of 2) Modem — VF Connection Symptom Action The modem does not receive a dial Attach a telephone directly to the telephone line to verify that a dial tone exists. tone. Make sure the VF line is connected to the modem’s rear jack labeled DIAL. The modem does not go off-hook Verify that the Auto Answer Ring Count configuration option is set to a value and answer an incoming call.
Page 216 Troubleshooting Table B-5 (2 of 2) Modem — VF Connection Symptom Action Perform an End-to-End test. Refer to Pattern located in the Test Branch section Intermittent disconnects, high error rates, or excessive retransmissions of Chapter 3. occur. The modem establishes and then You may have a poor VF connection.
Page 217: Overview
....Overview This appendix lists EIA-232-D and VF TELCO pin assignments and provides information about auxiliary cables which are not supplied by AT&T Paradyne. 3920-A2-GN31-10 April 1995...
Page 218: Eia-232-D Pin Assignments
COMSPHERE 392xPlus Modems EIA-232-D Pin Assignments Table C-1 lists the EIA-232-D pin assignments for the modem. Table C-1 EIA-232-D Pin Assignments Signal Name CCITT Circuit Function Circuit Source — — Shield Transmit Data Receive Data Request-to-Send Clear-to-Send Data Set Ready —...
Page 219: Pin Assignments
Pin Assignments VF Connector Pin Assignments Table C-2 lists the connector pin assignments for Model 3920Plus modular jacks as well as the pin assignments for the TELCO jacks. (See Figure C-1.) Table C-2 VF Connector Pin Assignments Type of Telco Jack Di l Leased Dial...
Page 220: Auxiliary Cables Not Supplied By At&T Paradyne
COMSPHERE 392xPlus Modems Auxiliary Cables Not Supplied by AT&T Paradyne To add an external telephone to your modem, use an external “Y” cable to connect the phone line to both the modem and the telephone (Figure C-2). Figure C-2. Wiring Diagram — “Y” Cable for External Telephone...
Page 221 Pin Assignments For 2-wire leased-line connections to a JM8 network interface, use an 8-position to 6-position crossover cable (Figure C-3) according to the following FCC requirements: “The RJ series of jacks should not be used for connecting data equipment to nonswitched private line networks —...
Page 222 COMSPHERE 392xPlus Modems To connect a Model 3920Plus port to another modem’s EIA-232-D interface, use a 25-pin crossover cable (Figure C-4). 25-POSITION 25-POSITION PLUG PIN NO. PLUG PIN NO. CT140 CT140 XTXC XTXC CT142 CT142 (TEST) (TEST) Figure C-4. Wiring Diagram — 25-Pin Crossover Cable April 1995 3920-A2-GN31-10...
Page 223: Ccitt V.25Bis Dialing Commands And Response
CCITT V.25bis Dialing Commands and Responses Overview ........... . Call Request Commands .
Page 224: Call Request Commands
COMSPHERE 392xPlus Modems Call Request Commands Call Request commands are issued from the DTE to the modem and are responsible for initiating dial calls. Call Request commands include Call Request with Number Provided (CRN) and Call Request with Stored Memory Address Provided (CRS). Call Request with Number Provided (CRN) The CRN command dials the telephone number entered from the DTE.
Page 225: Call Connecting (Cnx
CCITT V.25bis Dialing Commands and Responses ET is similar to the Call Failure Messages Busy Signal and Trunk Busy and the result code BUSY. NS is similar to the Common Operational Message Invalid Number and the result code ERROR. CB is similar to the Call Failure Messages Dial Line in Use and No Dial-Test and the result code ERROR.
Page 226: Connect Incoming Call (Cic
COMSPHERE 392xPlus Modems Connect Incoming Call (CIC) The CIC command forces the modem to cancel any DIC commands and answer an incoming call. This command is only valid when the DTE issues a DIC command. CIC must be issued within 10 seconds after sending a DIC. CIC is similar to the ATA command. The CIC command format is CIC.
Page 227: Request List Of Stored Numbers (Rln
CCITT V.25bis Dialing Commands and Responses Request List of Stored Numbers (RLN) The Request List of Stored Numbers (RLN) command displays telephone numbers stored in the modem’s directory location. If the RLN command is entered without specifying a directory location, then all directory locations and telephone numbers appear. If a directory location is entered, then only that telephone number appears.
Page 228: Valid (Val
COMSPHERE 392xPlus Modems Valid (VAL) The VAL response indicates that the modem has accepted the V.25bis command issued by the DTE. VAL is similar to the AT result code OK. Invalid (INV) The INV response indicates that the modem has received an incorrect V.25bis command from the DTE.
Page 229 CCITT V.25bis Dialing Commands and Responses Table D-2 lists V.25bis response messages supported by the 392xPlus modems. Table D-2 V.25bis Response Messages AT Command/ V.25bis Command Description Result Code Equivalent Call Response Call Failure Indication BUSY, NO ANSWER, NO CARRIER, NO DIAL TONE, ERROR Call Connecting Indication CONNECT...
Page 230: Ascii Character Table
ASCII Character Table Overview ........... . Overview Table E-1 in this appendix provides the ASCII character table.
Page 231 COMSPHERE 392xPlus Modems Table E-1 (2 of 4) ASCII Characters Hexadecimal Decimal Control ASCII Value ASCII Value Character CTRL-X CTRL-Y CTRL-Z CTRL-[ CTRL-/ CTRL-] CTRL-|Ax CTRL-_ spacebar “ & ’ < > April 1995 3920-A2-GN31-10...
Page 232 ASCII Character Table Table E-1 (3 of 4) ASCII Characters Hexadecimal Decimal Control ASCII Value ASCII Value Character ‘ 3920-A2-GN31-10 April 1995...
Page 233 COMSPHERE 392xPlus Modems Table E-1 (4 of 4) ASCII Characters Hexadecimal Decimal Control ASCII Value ASCII Value Character delete April 1995 3920-A2-GN31-10...
Page 234: Default Configuration Options
Default Configuration Options Overview ........... . Overview Table F-1 lists the six sets of default (preset) configuration options, labeled Sync Leased, Async Leased, TMp (Trellis Multipoint), Async Dial, Sync Dial, and UNIX Dial.
Page 235 COMSPHERE 392xPlus Modems Table F-1 (1 of 10) Factory Default Configuration Options Sync Leased Async Leased Async Dial UNIX Dial Sync Dial Configuration Default Default Default Default Default Default Option Settings Settings Settings Settings Settings Settings DTE Interface (mux enabled) Sub-group MUX Mode TDM/MSD...
Page 236 Default Configuration Options Table F-1 (2 of 10) Factory Default Configuration Options Sync Leased Async Leased Async Dial UNIX Dial Sync Dial Configuration Default Default Default Default Default Default Option Settings Settings Settings Settings Settings Settings Port Rate Sub-group (Cont’d) Rate at 14.4 K 14400 Port1 or 14400 Port1 or...
Page 237 COMSPHERE 392xPlus Modems Table F-1 (3 of 10) Factory Default Configuration Options Sync Leased Async Leased Async Dial UNIX Dial Sync Dial Configuration Default Default Default Default Default Default Option Settings Settings Settings Settings Settings Settings Port EIA Sub-group (Cont’d) CTS Control Standard RS232 Standard RS232...
Page 238 Default Configuration Options Table F-1 (4 of 10) Factory Default Configuration Options Sync Leased Async Leased Async Dial UNIX Dial Sync Dial Configuration Default Default Default Default Default Default Option Settings Settings Settings Settings Settings Settings DTE Interface (mux disabled) (Cont’d) Tx Clock Source Internal Internal †...
Page 239 COMSPHERE 392xPlus Modems Table F-1 (5 of 10) Factory Default Configuration Options Sync Leased Async Leased Async Dial UNIX Dial Sync Dial Configuration Default Default Default Default Default Default Option Settings Settings Settings Settings Settings Settings DTE Dialer (Cont’d) Result Codes Words Words Words...
Page 240 Default Configuration Options Table F-1 (6 of 10) Factory Default Configuration Options Sync Leased Async Leased Async Dial UNIX Dial Sync Dial Configuration Default Default Default Default Default Default Option Settings Settings Settings Settings Settings Settings Dial Line Dial Modulation V.34 V.34 V.34...
Page 241 COMSPHERE 392xPlus Modems Table F-1 (7 of 10) Factory Default Configuration Options Sync Leased Async Leased Async Dial UNIX Dial Sync Dial Configuration Default Default Default Default Default Default Option Settings Settings Settings Settings Settings Settings Lease Line (Cont’d) Short Short Short Short...
Page 242 Default Configuration Options Table F-1 (8 of 10) Factory Default Configuration Options Sync Leased Async Leased Async Dial UNIX Dial Sync Dial Configuration Default Default Default Default Default Default Option Settings Settings Settings Settings Settings Settings V.42 / MNP / Buffer ††...
Page 243 COMSPHERE 392xPlus Modems Table F-1 (9 of 10) Factory Default Configuration Options Sync Leased Async Leased Async Dial UNIX Dial Sync Dial Configuration Default Default Default Default Default Default Option Settings Settings Settings Settings Settings Settings Test DTE RL Disable Disable Disable Disable...
Page 244 Default Configuration Options Table F-1 (10 of 10) Factory Default Configuration Options Sync Leased Async Leased Async Dial UNIX Dial Sync Dial Configuration Default Default Default Default Default Default Option Settings Settings Settings Settings Settings Settings Security Entry Wait Time 20 sec 20 sec 20 sec...
Page 245 Sample Configurations Overview ........... . Point-to-Point .
Page 246: Point-To-Point
COMSPHERE 392xPlus Modems Point-to-Point Figure G-1 shows a sample configuration for point-to-point applications. 28800(V34) 28800(V34) 9600 9600 (Sync) Leased 9600 3920 Plus 3920 Plus (Sync) 4800 9600 4800 (Sync) Cable 2 Cable 2 4800 (Sync) Cable 1 Cable 1 Cable 1 Cable 1 4800 Cable 1...
Page 247: Sample Configurations
Sample Configurations Sample Port Rate Table Port Port 1 Port 2 Port 3 Port 4 Rate 28.8K 9600 9600 4800 4800 24.0K 9600 Disable 4800 4800 19.2K 9600 Disable 4800 4800 16.8K 9600 Disable Disable 4800 14.4K 9600 Disable Disable 4800 12.0K Disable...
Page 248: Extended Point-To-Point
COMSPHERE 392xPlus Modems Extended Point-to-Point Figure G-2 shows a sample configuration for extended point-to-point applications. 28800(V34) 28800(V34) 9600 9600 (Sync) 9600 Leased 3920 Plus 3920 Plus 4800 (Sync) 9600 4800 (Sync) Cable 2 Cable 2 4800 (Sync) Cable 1 Cable 1 Cable 1 Cable 1 4800...
Page 249: Cables
Sample Configurations 3910 A Use Sync Leased (Answer) default configuration options with the following exceptions: TX Clock Source Set to External. LeasedLine Rate Set to 4800(V32b). Autorate (Leased Line) Set to Disable. 3910 B Use Sync Leased (Originate) default configuration options with the following exceptions: TX Clock Source Set to RXC_Loop.
Page 250: Extended Multipoint
COMSPHERE 392xPlus Modems Extended Multipoint Figure G-3 shows a sample configuration for extended multipoint applications. 28800(V34) 28800(V34) 9600 9600 (Sync) Leased 9600 3920 Plus 3920 Plus 4800 (Sync) 9600 4800 (Sync) Cable 2 Cable 2 4800 (Sync) Cable 1 Cable 1 Cable 1 Cable 1 4800...
Page 251: Configuration Options
Sample Configurations Configuration Options 3920Plus A Use Sync Leased (Answer) default configuration options with the following exception: Rate Refer to Sample Port Rate Table in this section. 3920Plus B Use Sync Leased (Originate) default configuration options with the following exceptions: TX Clock Source Set to RXC_Loop.
Page 252 COMSPHERE 392xPlus Modems Cables Cable 1 Use a standard, customer-supplied, EIA-232-D/V.24 cable with a DB-25-P (plug) connector at one end to attach to the modem. Attach this to the connector labeled DTE1, 2, 3, or 4. Cable 2 Use part number 125-0053-1431 (an 8-position, 8-wire modular cord that is supplied with the modem).
Page 253: Cables
Sample Configurations Configuration Options 3920Plus A Use Sync Leased (Answer) default configuration options with the following exception: Auto Dial Back Set to Enable. Rate Refer to Sample Port Rate Table in this section. 3920Plus B Use Sync Leased (Originate) default configuration options with the following exception: Auto Dial Back Set to Enable.
Page 254: Point-To-Point With Network Management
COMSPHERE 392xPlus Modems Point-to-Point with Network Management Figure G-5 shows a sample configuration for point-to-point applications with network management. 28800(V34) 28800(V34) 9600 9600 (Sync) Leased 9600 3920 Plus 3920 Plus (Sync) 4800 9600 4800 (Sync) Cable 2 3600- Cable 2 4800 Hubbing (Sync)
Page 255: Cables
Sample Configurations Sample Port Rate Table Port Port 1 Port 2 Port 3 Port 4 Rate 28.8K 9600 9600 4800 4800 24.0K 9600 Disable 4800 4800 19.2K 9600 Disable 4800 4800 16.8K 9600 Disable Disable 4800 14.4K 9600 Disable Disable 4800 12.0K Disable...
Page 256: Carrier With Network Management
COMSPHERE 392xPlus Modems Carrier with Network Management Figure G-6 shows a sample configuration for COMSPHERE 3000 Series Carrier applications with network management. 28800(V34) 28800(V34) 9600 9600 (Sync) Leased 9600 3921 Plus 3920 Plus (Sync) 4800 9600 4800 (Sync) Cable 2 Cable 2 Circuit Card...
Page 257: Configuration Options
Sample Configurations Configuration Options 3921Plus Use Sync Leased (Answer) default configuration options with the following exception: Rate Refer to the Sample Port Rate Table in this section. Diag Connection Set to NMS(CC). NetMngmtAddress Set to 1. 3920Plus Use Sync Leased (Originate) default configuration options with the following exception: Rate Refer to the Sample Port Rate table in this section.
Page 258: Extended Diagnostics
COMSPHERE 392xPlus Modems Extended Diagnostics Figure G-7 shows a sample configuration for extended diagnostics. Figure G-7. Sample Configuration Extended Diagnostics Configuration Options 3920Plus A Use Sync Leased (Answer) default configuration options with the following exception: NetworkPosition Set to Control. Diag Connection Set to NMS(CC).
Page 259: Cables
Sample Configurations 3920Plus C Use Sync Leased (Answer) default configuration options with the following exceptions: Tx Clock Source Set to External. Extended Channel Set Port 1 to Enable. Upstream Port # Set to Port 1. Diag Connection Set to Modem(DC). NetworkPosition Set to Control.
Page 260: Digital Bridging
COMSPHERE 392xPlus Modems Digital Bridging Figure G-8 shows a sample for Digital Bridging. Figure G-8. Sample Configuration Digital Bridging 3920Plus A Use TMp Control Template default configuration options with the following exception: MUX Mode Set to DTE Bridge. 3920Plus Use Sync Dial template default configuration options with the following B, C exceptions: MUX Mode...
Page 261: Cables
Sample Configurations 3920Plus Use TMp Tributary template default configuration options with the following E, G exceptions: Port2 MSD Set to Enable. RTS Action Set to Sim_Cntl_Car. Auto Dial Back Set to Enable. Auto Dial Standby Set to Adv 15min. Dial Line Rate Set to 14400(V34).
Page 262: Point-To-Point Msd
COMSPHERE 392xPlus Modems Point-to-Point MSD Figure G-9 shows a sample configuration for point-to-point MSD. Figure G-9. Sample Configuration — Point-to-Point MSD 3920Plus A Use Sync Lease Answer Template default configuration options with the following exception: Rate Refer to the Sample Port Rate Table in this section. 3920Plus B Use Sync Lease Originate Template default configuration options with the following exception:...
Page 263 Sample Configurations Sample Port Rate Table: Point-to-Point MSD 3920Plus A Port Port 1 Port 2 Port 3 Port 4 Rate 28.8K 19200 Disable Disable 9600 24.0K 14400 Disable Disable 9600 19.2K 9600 Disable Disable 9600 16.8K 4800 Disable Disable 9600 14.4K 4800 Disable...
Page 264: Multipoint Msd
COMSPHERE 392xPlus Modems Multipoint MSD Figure G-10 shows a sample configuration for multipoint MSD. Figure G-10. Sample Configuration — Multipoint MSD 3920Plus A Use TMp Control Template default configuration options with the following exception: NetworkPosition Set to Control. 3920Plus Use TMp Control Template default configuration options with the following B, C, D exception: MSD Control...
Page 265: Cables
Sample Configurations Cables Cable 1 Use a standard, customer-supplied, EIA-232-D/V.24 cable with a DB-25-P (plug) connector at one end to attach to the modem. Attach this to the connector labeled DTE1, 2, 3, or 4. Cable 2 Use part number 125-0053-1431 (an 8-position, 8-wire modular cord that is supplied with the modem).
Page 266: Equipment List
Equipment List Feature/ Equipment Part Number Model 3920 Plus 3920-A1-XXX Model 3921 Plus 3921-B1-XXX 6-position, 4-wire modular cord, 7-foot length 125-0067-0031 8-position, 8-wire modular cord, 14-foot length 125-0053-1431 Universal Power Supply 327-0074-XXXX 3600 Hubbing Device 3600-F3-300 EIA-323-D/V.24 Crossover Cable 818-2759-0111 6-position, 6-wire modular cord 125-0040-0031 8-position, 8-wire modular cord...
Page 267: Glossary
Glossary Active (Operating) A configuration area containing configuration options currently in use by the modem. Anytime a power cycle occurs or a reset is performed or a save is issued using the DCP, this area is updated with the contents of Active (Saved). Active (Saved) A nonvolatile configuration area containing the most recently saved configuration options.
Page 268 COMSPHERE 392xPlus Modems automatic dial standby When operating in Dial Backup mode, this function forces the modem to periodically check the quality of the leased line. If the leased line is found to be at normal operating condition, the modem disconnects from the dial network and continues normal operation over the leased-line network.
Page 269 Glossary CCITT V.32 A standard for modems operating full-duplex with asynchronous or synchronous data over leased lines or dial networks at 4800 or 9600 bps. CCITT V.32bis A standard for modems operating full-duplex with asynchronous or synchronous data over leased lines or dial networks at 4800, 7200, 9600, 12,000, or 14,400 bps. CCITT V.42 CCITT standard for error control protocol.
Page 270 COMSPHERE 392xPlus Modems data carrier A continuous frequency signal that can be modulated by another signal that contains information to be transmitted. data compression The elimination of empty fields, redundancies, and gaps in order to reduce storage capacity needs and the amount of data to be transmitted. Anything that is eliminated is restored after the data is received.
Page 271 Glossary Canadian Department of Communication. download A process that transfers modem firmware from a locally attached PC to a modem or allows the cloning of firmware from a local modem to a remote modem. downstream modem A device connected “farther” from the host computer. The equipment (Data Terminal Equipment), such as a computer or terminal, that provides data in the form of digital signals.
Page 272 COMSPHERE 392xPlus Modems half-duplex Two-way data communications allowed in only one direction at a time. handshaking The exchange of predetermined codes and signals (tones) to establish a connection between two modems. HDLC High-Level Data Link Control. A communications protocol defined by the International Standards Organization (ISO).
Page 273 Glossary Modem Sharing Device. Allows from 2 to 4 physical ports to share a communication channel. multiplexer (mux) A device that enables the simultaneous transmission of multiple independent data streams into a single high-speed data stream. multipoint line A circuit connecting one control modem with one or more tributary modems. network A communications circuit.
Page 274 COMSPHERE 392xPlus Modems PSTN Public Switched Telephone Network. A network shared among many users who can use telephones to establish connections between two points. Also known as dial network. Quick Configuration An informative display screen available from the modem’s Top-Level display. It provides display such information as network position (control or tributary), network management address, DTE mode (Asynchronous or Synchronous), Line mode (Leased Answer,...
Page 275 A modulation that adds the 19,200 bps and 16,800 bps data rates to the V.32bis data rates. It is an AT&T Paradyne proprietary modulation, not a CCITT standard. Voice Frequency. The part of the audio frequency range used to transmit voice sound (usually 300 Hz to 3400 Hz).
Page 276 Index Abort (test), 3-54 configuration options ac power requirements, 1-9 defaults, 2-6–2-7, 4-2, F-2–F-7 Active (Operating) configurations, 4-1 tables Active (Saved) configurations, 4-1 Dial Line, 4-22–4-23, 4-49–4-51 address, network management, 3-31, 4-29, 4-67 DTE Dialer, 4-40–4-44 analog loopback test, 3-56–3-57 DTE Interface, 4-10–4-18, 4-32–4-39 answer access security, 6-2–6-4 Leased Line, 4-24–4-26, 4-52–4-56...
Page 277 COMSPHERE 392xPlus Modems digital loopback, 3-57–3-58, 3-59–3-60 Identity, 3-23 dimensions, 1-10 indicators, status (LEDs), 3-3–3-6 directory, telephone number, 3-69–3-72 installation disconnecting a call, 3-66 Model 3920, 2-2–2-12 Download Software, 3-42–3-49 Model 3921, 2-8–2-11 connection, 2-4, B-3 status, 3-3–3-6, 3-24 keypad, 3-8–3-9 DTE Bridge, digital bridging, 1-3 DTE Dialer configuration options group, 4-40–4-44 DTE Interface configuration options group, 4-10–4-18,...
Page 278 Index network interface module (NIM), 2-2, 3-41 S-Register list, 5-15–5-28 network management address, 3-31, 4-29, 4-67 Security network management system connection, 2-5 access messages, 3-14 branch, 3-10, 6-4–6-13 configuration options, 6-13–6-14 database tables, 6-2, 6-3, 6-16–6-17 operating modes passwords, 6-2–6-4, 6-15–6-16 AT commands, 5-1 Select key, 2-10, 3-8, 3-9 Talk/Data, 3-10, 3-72–3-74...
Page 279 COMSPHERE 392xPlus Modems V.25bis dialing commands and response, D-1–D-8 V.34, 3-25 V.42 error control, 4-57 V.42/MNP/Buffer configuration options group, 4-57–4-62 V.42bis data compression, 4-58 connection, 2-4, 2-5, B-4–B-5 interface requirements, 1-10 pin assignments, C-3 status, 3-20–3-23 VF Thresholds Update, 3-50–3-53 warranty, 1-7 weight, 1-10 Index-4...

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Comsphere 3921plus

Paradyne Comsphere 3920Plus Installation And Operation Manual

Table of Contents

1 Introduction

2 Modem Installation

3 Dcp Operation

4 Dcp Configuration

5 At Command Set and S-Registers

Pin Assignments

D Ccitt V.25Bis Dialing Commands and Responses

Sample Configurations

Quick Links

Chapters

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Summary of Contents for Paradyne Comsphere 3920Plus