Paradyne 3800 User Manual
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Paradyne 3800 User Manual

Comsphere 3800 series
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COMSPHERE
3800 SERIES MODEMS
MODELS 3810, 3811, AND 3820
USER'S GUIDE
Document No. 3810-A2-GB30-30

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Summary of Contents for Paradyne 3800

  • Page 1 COMSPHERE 3800 SERIES MODEMS MODELS 3810, 3811, AND 3820 USER’S GUIDE Document No. 3810-A2-GB30-30...
  • Page 2 COMSPHERE 3800 SERIES MODEMS MODELS 3810, 3811, AND 3820 USER’S GUIDE Document No. 3810-A2-GB30-30 September 1998...

  • Page 3: Document Feedback

    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, Paradyne Corporation reserves the right to revise this publication and to make changes from time to time in the contents hereof without obligation of Paradyne Corporation to notify any person of such revision or changes.

  • Page 4: Important 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 COMSPHERE 3800 Series Modems Notices THIS EQUIPMENT HAS BEEN TESTED AND FOUND TO COMPLY WITH THE LIMITS FOR A CLASS A DIGITAL DEVICE, PURSUANT TO PART 15 OF THE FCC RULES. THESE LIMITS ARE DESIGNED TO PROVIDE REASONABLE PROTECTION AGAINST HARMFUL INTERFERENCE WHEN THE EQUIPMENT IS OPERATED IN A COMMERCIAL ENVIRONMENT.

  • Page 6: Government Requirements And Equipment Return

    RENs, contact the telephone company to determine the maximum RENs for the calling area. 4. If the 3800 Series modem causes harm to the telephone network, the telephone company will notify you in advance that temporary discontinuance of service may be required. But if advance notice is not practical, the telephone company will notify the customer as soon as possible.
  • Page 7 COMSPHERE 3800 Series Modems 8. This equipment cannot be used on public coin service provided by the telephone company. Connection to Party Line Service is subject to state tariffs. (Contact the state public utility commission, public service commission or corporation commission for information.) 9.
  • Page 8 Repairs to certified equipment should be made by an authorized Canadian maintenance facility designated by the supplier. Any repairs or alterations made by the user to this equipment, or equipment malfunctions, may give the telecommunications company cause to request the user to disconnect the equipment.
  • Page 9 COMSPHERE 3800 Series Modems September 1998 3810-A2-GB30-30...

  • Page 10: Table Of Contents

    ..........COMSPHERE 3800 Series Models .
  • Page 11 COMSPHERE 3800 Series Modems 4. DCP Operation 5. Call Setup Branch 6. Talk/Data Branch 7. Status Branch 8. Test Branch 9. Configure Branch 10. Control Branch 11. Remote Branch Overview ..........
  • Page 12 12. Security 13. Fax Operation 14. AT Command Set and S-Registers Appendices Glossary Index 3810-A2-GB30-30 Overview ..........Security Branch .
  • Page 13 DCP Configuration Process AT Command Configuration Process 11-1 Top-Level Menu of a Remote 3800 Series Modem Wiring Diagram – 8-Position to 6-Position Crossover Cable List of Figures ..........
  • Page 14 Modem – DTE Connection Modem – VF Connection Online Operation Leased-Line Operation Dial Backup Operation Technical Specifications for 3800 Series Modems VF Connector Pin Assignments: Models 3810 and 3820 VF Connector Pin Assignments: TELCO Jacks EIA-232-D Pin Assignments EIA RS-366-A Pin Assignments V.25bis Commands...
  • Page 15 COMSPHERE 3800 Series Modems September 1998 3810-A2-GB30-30...

  • Page 16: Preface

    Chapter 14 provides instructions for displaying and changing AT commands and S-registers. Appendix A provides a menu tree for 3800 Series modems. Appendix B provides a list of the result codes produced by 3800 Series modems. Appendix C...

  • Page 17: Related Documents

    3600 Hubbing Device Feature Number 3600-F3-300 Installation Instructions viii Contact your sales or service representative to order additional product documentation. Paradyne documents are also available on the World Wide Web at: http://www.paradyne.com Select Service & Support September 1998 Technical Manuals...

  • Page 18: Introduction

    ........... . . The 3800 Series modem is extremely versatile when used in modem pooling environments; it allows multiple users to temporarily customize settings in the 3800 Series modem, thereby permitting communication with the calling modem. Upon disconnection, the 3800 Series modem falls back to its original configuration settings and resumes normal operation.

  • Page 19: Features

    COMSPHERE 3800 Series Modems Features The 3800 Series modems have a wide variety of features. Dial-Line Modulations: V.32terbo (19,200 and 16,800 bps), ITU-T V.32bis (14,400, 12,000, 9600, 7200, and 4800 bps), V.32 (9600 and 4800 bps), V.22bis (2400 bps), V.22 (1200 bps), V.21 (300 bps), Bell 212A, (1200 bps), and Bell 103J (300 bps).

  • Page 20: Model 3810 And 3820 Installation

    ............... . . 3800 Series Modem Package...

  • Page 21: 3800 Series Modem Package

    COMSPHERE 3800 Series Modems DIAGNOSTIC CONTROL PANEL SPEAKER STATUS INDICATORS 3800 Series Modem Package After opening the modem’s package, check for damage and verify that the following items are present: Manual and Quick Reference Model 3810 or Model 3820 modem...

  • Page 22: Model 3810 Or Model 3820 Modem Installation

    Customer-Supplied Equipment The following customer-supplied equipment is required to complete a data communications system using either the Model 3810 or Model 3820 modem: A DTE with an available EIA-232-D serial port. A standard EIA-232-D male-to-female cable with a male DB-25-S connector at one end to attach to the modem.

  • Page 23: Model 3810 Dial-Line Connection

    COMSPHERE 3800 Series Modems Model 3810 Dial-Line Connection For the Model 3810, use the following procedures to connect the modem to the dial network interface: 1. Insert the 6-position, 4-conductor modular plug into the jack labeled DIAL / LEASED (3820). See Figure 2-2.

  • Page 24: Model 3820 Dial-Line Connection

    Model 3820 Dial-Line Connection Use the following procedures to connect a Model 3820 to the dial network interface: 1. Insert the 6-position, 4-conductor modular plug into the jack labeled DIAL / LEASED (3820). See Figure 2-3. 2. Insert the other end of the modular cord into the dial network interface.
  • Page 25 COMSPHERE 3800 Series Modems DTE Connection Use the following procedures to connect the EIA-232-D cable and ferrite choke from the modem to the DTE: 1. Make sure the modem’s rear panel power switch is Off. 2. Connect the DB-25 plug on the cable to the DB-25 socket labeled DTE on the modem’s rear panel.

  • Page 26: Model 3810 And Model 3820 Telephone Connection

    Model 3810 and Model 3820 Telephone Connection Use the following procedures to connect the modem to a telephone: 1. Insert the 6-position, 4-conductor modular plug into the jack labeled PHONE/LEASED (3810). 2. Insert the other end of the modular cord into the telephone.

  • Page 27: Removing And Replacing Model 3810 And Model 3820 Modems

    COMSPHERE 3800 Series Modems Removing and Replacing Model 3810 and Model 3820 Modems To remove and replace a Model 3810 or Model 3820 modem, perform the following steps: 1. Make sure the modem is offline, and press the modem’s rear panel power switch to the Off position.

  • Page 28: Model 3811 Installation

    Overview ................Model 3811 Installation .
  • Page 29 COMSPHERE 3800 Series Modems FACEPLATE Status Alrm Test Dial Busy Serv Front Panel Spkr 3811 Model 3811 Installation The Model 3811 is designed for installation in a COMSPHERE 3000 Series Carrier which supplies operating power and the dial and/or leased-line network connections.

  • Page 30: Installing A Model 3811 Modem

    The installation of a Model 3811 varies slightly if an SDCP is installed on the front of the carrier. To install a Model 3811 modem into the carrier without an SDCP, perform the following steps: CAUTION If the Model 3811 is removed from the carrier, always use a ground strap when handling the modem.

  • Page 31: Removing And Replacing Model 3811 Modems

    4. Press the F1 (") or F2 ( ) key until the slot number (1–16) you want appears on the LCD. Ignore the AB designator that appears on the LCD since it is not applicable to the 3800 Series modems. 5. Press the...

  • Page 32: Dcp Operation

    ............. . Overview This chapter describes how to use the diagnostic control panel (DCP) of the 3800 Series modem. It also describes how to select and use each branch of the Top-Level menu tree.

  • Page 33: Model 3810 Dcp

    COMSPHERE 3800 Series Modems COMSPHERE 3810 COMSPHERE 3820 ALRM DIAG Figure 4-1. Model 3810 DCP Figure 4-2. Model 3820 DCP September 1998 TEST RATE 496-13067-02 496-13068-02 3810-A2-GB30-30...

  • Page 34: Optional Sdcp, Model 3811 Faceplate, And Optional Sdu

    Model 3811 Faceplate and Shared Diagnostic Control Panel The SDCP, is used to manage carrier-mounted Model 3811 modems. Use the SDCP to issue commands to, view and select configuration options on, or monitor tests for a specific Model 3811 modem. Status Status Alrm...

  • Page 35: Status Indicators

    COMSPHERE 3800 Series Modems Status Indicators The 3800 Series modems’ status indicators continuously provide information on the modem’s operating condition. All of the status indicators on the Model 3810 and Model 3820 appear on the DCP (Figures 4-1 and 4-2), whereas the status indicators for the...

  • Page 36: Model 3820 Dcp Leds

    DCP LEDs for the standalone Model 3820 are listed and described in Table 4-2. Label Color RTS/105 green RTS signal is ON. CTS/106 green CTS signal is ON. TXD/103 green The modem is receiving data from the DTE to transmit. (ON equals space.) LSD/109 green The modem receiver has detected a valid carrier signal and is capable of transferring data to...

  • Page 37: Diagnostic Control Panel Operation

    Remote Mode Indicator TOP-LEVEL MENU If the local 3800 Series modem establishes a connection with the remote 3800 Series modem via the Remote branch, then choice indicator on both modems. Keypad The DCP on the Model 3810 and Model 3820 has...

  • Page 38: Menu Structure

    The menu tree is a hierarchical structure used to display functions that configure and control local and remote 3800 Series modems. It is accessed via the DCP and is shown in Appendix A. The menu tree contains the following branches:...

  • Page 39: Top-Level Menu Status

    COMSPHERE 3800 Series Modems Top-Level Menu Status and Operational Messages Access to all menu tree branches from the DCP begins at the Top-Level menu, the head of the menu hierarchy. Normal Operation Status Message Fax Rx:MR* Indicates that the modem is online, in fax receive modem, operating at the displayed data rate.
  • Page 40 Call Failure Messages Busy Signal The answering modem is busy. Dial Line in Use The modem is already operating on dial networks when another call attempt has been issued. Invalid Number The modem has dialed a telephone number not stored in a directory location. No Answer Tone The answering modem has not answered within the time limit specified by the No Answer Timeout configuration option.
  • Page 41 COMSPHERE 3800 Series Modems Dial Backup Messages Dial Standby The modem is operating in Dial Standby mode. DialBckUp:MR* The modem is operating in a Dial Backup mode at the displayed data rate and is configured for Direct mode. Backup:MR* EC** The modem is operating in Dial Backup mode and is configured for error control and data compression on leased lines.

  • Page 42: Common Operational Messages

    Messages listed in Table 4-5 are common operational messages that occur during modem operation. These messages normally appear on the second line of the LCD. Common Operational Messages Please Wait... Appears when a command to a local device takes more than two seconds to complete. Command Sent...

  • Page 43: Dial Access Security Messages

    COMSPHERE 3800 Series Modems Messages listed in Table 4-6 are dial access security messages that can occur when the optional security feature is installed. Dial Access Security Messages Get VF PsWd The answering modem is waiting for the originating caller to transmit a VF password.

  • Page 44: Selecting Factory Configuration Options

    After the modem passes the power-up self-test, configure it for operation using one of the factory preset configurations. The 3800 Series modems have several factory preset templates that contain the most commonly used configuration options (straps) for Asynchronous Dial, Synchronous Dial, Synchronous Leased (Answer or Originate), UNIX hardware network, cellular mobile, and cellular PSTN configurations.
  • Page 45 COMSPHERE 3800 Series Modems On initial power-up, the modem is in Command mode. To verify that the modem is connected and functioning properly, enter the following: TYPE: PRESS: Return (Enter) The screen displays OK. If the modem does not return OK, refer to Appendix C, Troubleshooting.

  • Page 46: Diagnostic Control Panel Security Access

    DCP security access selections. Use the DCP security access function to ‘‘lock” the DCP of any 3800 Series modem and prevent unwanted user access. Two options are available for this function: Grant and Deny. Grant allows any branch of the Top-Level menu to be accessed from the DCP.
  • Page 47 COMSPHERE 3800 Series Modems 4-16 September 1998 3810-A2-GB30-30...

  • Page 48: Call Setup Branch

    Overview ............... . . Call Setup Branch .
  • Page 49 COMSPHERE 3800 Series Modems Call Setup Branch In the following descriptions, the shaded key indicates what key to press to perform the described operation. To access the Call Setup branch from the Top-Level menu, select Call_Setup: Idle: 19.2 > Call_Setup...
  • Page 50 Disconnect Disconnect allows the modem to go on-hook (hang up). Use this function when you want to disconnect an established call on a dial line. NOTE When the Model 3820 is configured for leased-line operation, this function is not available and is not displayed on the LCD.
  • Page 51 COMSPHERE 3800 Series Modems Dial Standby/Return to Dial The Dial Standby and Return to Dial functions appear on the LCD only after the Model 3810 or Model 3811, operating on leased lines, is placed into dial backup. Once the modem is operating in Dial Backup mode, these...
  • Page 52 Dial Standby Command Complete If the modem is operating in a Dial Backup mode, the Dial Standby function forces the modem to leased lines and displays the status message Command Complete. Once the modem is in Dial Standby mode, the Return to Dial function appears on the LCD.

  • Page 53: 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 3800 Series Modems recognize: T – Tone (DTMF) dial. Any digit 0–9, *, #, A, B, C, or D can be dialed as tone.

  • Page 54: Talk/Data Branch

    Overview ............... . . Talk/Data Branch .
  • Page 55 If the handshake is successful, the modems are in Data mode and OnLine appears on the LCD. If the remote modem is not a 3800 Series modem, then the remote user must consult that modem’s operator’s manual to perform a similar operation.

  • Page 56: Status Branch

    Overview ............... . . Status Branch .
  • Page 57 COMSPHERE 3800 Series Modems Status Branch To access Status from the Top-Level menu, make the following selections: Idle : 19.2 Tlk/Data Status Press the key until Status appears. Select Status. VF displays the condition of the dial or leased-line connection.
  • Page 58 Identity Identity displays the modem’s serial number, model number, firmware revision level, hardware part number and firmware part number. Retrieval of this information is useful if you are purchasing additional or replacement modems and/or making firmware upgrades. To access Identity from the Status branch, make the following selection: Status: Identity...
  • Page 59 COMSPHERE 3800 Series Modems DTE displays the state and/or activity of the EIA-232-D interface leads: LSD, DTR, DSR, Tst, TXD, RXD, RTS, and CTS signals are monitored. The interface leads status is updated every 5 seconds. To access DTE from the Status branch, make the...
  • Page 60 Options The Options Status function displays all optional firmware features currently installed in the modem (for example, V.29, V.33, and dial network management). If no firmware options are installed, None_Installed appears on the LCD. To access Options from the Status branch, make the following sections: Status: RS366A...
  • Page 61 COMSPHERE 3800 Series Modems September 1998 3810-A2-GB30-30...

  • Page 62: Test Branch

    Overview ............... . . Test Branch .
  • Page 63 COMSPHERE 3800 Series Modems Test Branch To access the Test branch from the Top-Level menu, make the following selections: Idle : 19.2 Status 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 64: Local Analog Loopback

    Loc Analog Loop Loc Analog Loop performs a local analog loopback (ITU-T V.54 Loop 3), Figure 8-1, that verifies modem operation as well as the connection between the DTE and modem. The modem must be offline to perform this test, otherwise Invalid Command appears.

  • Page 65: Remote Digital Loopback

    COMSPHERE 3800 Series Modems Rem Digital Loop Rem Digital Loop performs a remote digital loopback (ITU-T V.54 Loop 2), Figure 8-2. This test can verify the integrity of the local modem, the communications link, and the remote modem. Any data or pattern entered at the local DTE is sent to and returned from the remote modem.

  • Page 66: Local Digital Loopback

    Loc Digital Loop Loc Digital Loop is issued by a local modem and forces it to loopback any data received from the remote modem (Figure 8-3). (This test operates the same as a ITU-T V.54 Loop 2 except it is issued at your modem.) This is useful if a remote modem is incapable of initiating a remote digital loopback from its location.

  • Page 67: Pattern Test And Local Analog Loopback Test

    COMSPHERE 3800 Series Modems Pattern Pattern can transmit and receive a 511 bit error rate test pattern. It can also be used with a local analog loopback or a remote digital loopback to simulate data passing Figure 8-4. Pattern Test and Local Analog Loopback Test Figure 8-5.

  • Page 68: 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. Test : Pattern Blks Errd = xxxxxxx BlksErrd=xxxxxxx displays the number of blocks of data found in error (block size is 1000 bits per block).
  • Page 69 COMSPHERE 3800 Series Modems September 1998 3810-A2-GB30-30...

  • Page 70: Configure Branch

    ................Security Configuration Options Overview After installing a 3800 Series modem, its software configuration options must be set using either the Diagnostic Control Panel (DCP) or the AT command set.

  • Page 71: Dcp Configuration Process

    COMSPHERE 3800 Series Modems Figures 9-1 and 9-2 graphically display the interaction between the edit area and configuration areas as viewed from the perspective of the DCP and the AT command set. CONTENTS OF Active (Saved) ARE AUTOMATICALLY COPIED TO...

  • Page 72: At Command Configuration Process

    Active (Saved) (ATZ0, ATZ3) NOTE ON POWER-UP, Active (Saved) IS LOADED TO Active (Operating) Active (Saved) (AT&W0) Figure 9-2. AT Command Configuration Process 3810-A2-GB30-30 Customer 1 Customer 2 (ATZ1) (ATZ2) • Async Dial (AT&F0) • Sync Dial (AT&F1) • Sync Leased Answer (AT&F2)
  • Page 73 COMSPHERE 3800 Series Modems Configure Branch The Configure branch of the Top-Level menu contains all of the modem’s configuration options (straps) which determine how the modem operates. These configuration options are accessed by scrolling down and across various levels of the Configure branch.
  • Page 74 The following example shows how to change the Remote Access Password using the DCP. (If you ever intend to access another 3800 Series modem via the Remote branch of the Top-Level menu, the Remote Access Password must be the same for both modems.) By...
  • Page 75 COMSPHERE 3800 Series Modems Select Nxt until RemAccssPasswrd appears. RemAccssPasswrd °00000000 Select the F2 (°) key to increment password values. RemAccssPasswrd °00000000 Press the key to move the cursor to the next position. RemAccssPasswrd °12345678 Continue this sequence until you have entered the new password value.

  • Page 76: Configuration Tables

    Configuration Tables The modem’s configuration options are arranged into eight groups based upon functionality: DTE Interface (Table 9-1), DTE Dialer (Table 9-2), Line Dialer (Table 9-3), Dial Line (Table 9-4), Leased Line (Table 9-5), V.42/MNP/Buffer (Table 9-6), Tests (Table 9-7), and Misc (Table 9-8). Throughout these tables, two selections frequently appear on the LCD: Enable and Disable.

  • Page 77: Dte Interface Configuration Options

    COMSPHERE 3800 Series Modems Async/Sync Mode: Async Nxt Async Sync Asynchronous/Synchronous Mode. Determines whether the modem operates in Asynchronous mode or Synchronous mode. If the AT command set is enabled and this configuration option is set for Sync, then the modem operates in Async mode when offline.
  • Page 78 Parity Bit: None Nxt None Even Odd Mark Space Parity Bit. Determines type of parity bit. The parity of the DTE must match the parity of the modem. Parity options include None, Even, Odd, Mark, or Space. None – No parity bit is used. This is the default for Async mode. Even –...
  • Page 79 COMSPHERE 3800 Series Modems DTR Action: Ignore Nxt Stndrd_RS232 Ignore CntrlsOnHook Off=ReloadStrp Off=CmdMode 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. Standard RS232 – Allows the DTE to control DTR to the modem as specified in EIA-232-D and ITU-T V.24 specifications.
  • Page 80 DSR Control (cont’d) Delay to Data – Operation is similar to the Standard RS232 setting except that DSR does not turn ON until the modem enters Data mode. Normally, the modem raises DSR when it begins the handshaking process. Use this setting when the DTE cannot operate with a long DSR-to-CTS delay (common for V.32bis modulation) or when dial access security is enabled and requires a DTE-side password entry.
  • Page 81 COMSPHERE 3800 Series Modems CTS Control: Forced_On Nxt Forced_On Stndrd_RS232 WinkWhenDisc Follows_DTR Clear-to-Send Control. CTS is a signal from the modem to the DTE indicating that it can accept data from the DTE. NOTE: When CTS flow control or CTS/RTS flow control is enabled, CTS will turn ON and Off regardless of the setting of CTS Control.
  • Page 82 Configure Branch Table 9-1 (6 of 7) DTE Interface Configuration Options LSD Control: Stndrd_RS232 Stndrd_RS232 Forced_On WinkWhenDisc Follows_DTR Sim_Cntrl_Car =DTR/DiscOff BridgeRetrain 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 83 COMSPHERE 3800 Series Modems CT111_Rate Cntl: Disable Nxt Disable Fallback1 Fallback2 CT111 Rate Control. Allows the DTE to control modem rate via Pin 23 of the EIA-232-D interface. This option determines the effect of the DTE Rate control signal. CT111 is also known as CH on the EIA-232-D interface.

  • Page 84: Dte Dialer Configuration Options

    DTE Dialer The DTE Dialer configuration options establish the DTE-to-modem protocol for call establishment and control. DTE Dialer Type: AT Nxt AT Disable V25bis_Async V25bis_Bsync V25bis_HDLC DTR=Dirs RS366A AT&T_Exclusv Data Terminal Equipment Dialer Type. Identifies to the modem the type of dialing method and protocol used by the DTE. AT –...
  • Page 85 COMSPHERE 3800 Series Modems *AT Escape Char: 043 ASCI Nxt " 043 ASCI AT Escape Character. The escape sequence (+++) allows you to move back and forth between Command mode and Data mode. The ASCII value of the escape character (43 ASCII) can be set to any ASCII value from 1 ASCII to 255 ASCII.
  • Page 86 *Backspace Char: 008 ASCI 008 ASCI Backspace Character. Sets the character used to perform a backspace in Command mode. The factory default is 08 (ASCII backspace character). AT command is S-register S5 = n, where n is a value from 0 to 127. *Linefeed Char: 010 ASCI 010 ASCI Line Feed Character.
  • Page 87 COMSPHERE 3800 Series Modems *ResultCode Form: Words Nxt Words Numbers (1) Numbers (2) Result Codes Format. Controls whether or not result codes appear as words or as numeric codes. Some DTEs do not recognize Result Codes as words; therefore, numbers are required. The Numbers (2) format is required for some modem pooling applications.
  • Page 88 Configure Branch Table 9-2 (5 of 5) DTE Dialer Configuration Options V.25b NewLineChr: CR+LF Nxt CR+LF CR LF V.25bis New Line Character. Sets the modem for the command line terminator used by the DTE in V.25bis Async mode. The modem responds to the DTE using the same line terminator. NOTE: This configuration option only appears if DTE Dialer is configured for V25bis Async.

  • Page 89: Line Dialer Configuration Options

    COMSPHERE 3800 Series Modems Line Dialer The Line Dialer configuration options establish parameters used by the modem to answer or originate calls. AutoAnswerRing#: 1 Nxt 1 Disable 2 4 6 8 10 Auto-Answer Ring Count. Determines the number of rings necessary before the answering modem answers an incoming call.
  • Page 90 Blind Dial Paus: 2sec Nxt 2sec 4sec 6sec 8sec 10sec 20sec Blind Dial Pause. Determines how long the modem waits before dialing a telephone number when DialTone Detect is disabled. NOTE: The Blind Dial Pause configuration option only appears when the Dial Tone Detect configuration option is disabled.
  • Page 91 COMSPHERE 3800 Series Modems Fast Disconnect: Disable Nxt Disable Enable Fast Disconnect. Allows the modem to disconnect immediately after receiving a disconnect command from a local DTE or its own diagnostic control panel. Disable – The modem follows its normal disconnect sequence by issuing a cleardown sequence or long space disconnect.
  • Page 92 No Carrier Disc: 2sec Nxt 2sec 5sec Disable 10sec 20sec No Carrier Disconnect. If the modem no longer receives carrier from the remote modem, it disconnects the call. This configuration option determines how long carrier is Off before the modem disconnects. Loss of carrier is one method of disconnecting a call.
  • Page 93 COMSPHERE 3800 Series Modems Auto Make Busy: Disable Nxt Disable Enable Automatic Make Busy. Forces the modem to go off-hook under the following conditions: a local analog loopback is performed, a self-test is performed, or if the modem is switched to the service line. This option is only valid with the Model 3811 and does not appear on the Model 3810’s or Model 3820’s LCD.

  • Page 94: Dial Line Configuration Options

    Dial Line The Dial Line configuration options are used to configure the modem for operation over dial lines. Dial LineRate: 19200(V32t) Nxt 19200(V32t) 16800(V32t) 14400(V32b) 12000(V32b) 9600(V32b) 7200(V32b) 4800(V32b) 2400(V22bis) 1200(V22) 1200(212A) 0–300(V21) 0–300(103J) Dial Line Rate. This configuration option determines the modem’s data rate and modulation scheme for operation on dial lines.
  • Page 95 COMSPHERE 3800 Series Modems V32bis Autorate: Enable Nxt Enable Disable StartAt48 StartAt96 Enable – Once connected, the modem automatically lowers the line rate if line conditions become impaired. When line conditions improve, the modem automatically shifts up to the highest data rate the line can support. This autorating only occurs between 14,400 bps and 4800 bps during V.32/V.32bis connections.
  • Page 96 V32bis Train: Long Nxt Long Short V.32bis Train. Controls V.32bis and V.32 train. Determines whether minimum or maximum time durations are used during the V.32bis/V.32 handshaking sequence for both dial and 4-wire/2-wire leased line applications. NOTE: This configuration option only appears when the Dial Line Rate configuration option is set for Auto:148-3 or any fixed V.32bis data rate.

  • Page 97: Leased Line Configuration Options

    COMSPHERE 3800 Series Modems Leased Line The Leased Line configuration options are used to configure the modem for operation over leased lines. The Leased Line configuration group only appears if the modem is configured with the Sync Leased factory preset template, or when the &L1, &L2, &L3, or &L4 command is issued.
  • Page 98 Configure Branch Table 9-5 (2 of 5) Leased Line Configuration Options V32bis Autorate: Enable Nxt Enable Disable V.32bis Autorate. Once connected, the modem automatically lowers the line rate if line conditions become impaired. When line conditions improve, the modem automatically shifts up to the highest data rate the line can support. This autorating only occurs between 14,400 bps and 4800 bps during V.32/ V.32bis connections.
  • Page 99 COMSPHERE 3800 Series Modems BdLn Auto Orig: Disable Nxt Disable Enable FastBackup 2_min 5_min 10_min Bad Lines Auto Originate. Allows the modem to dial the number stored in directory location 1 to restore communications with the remote modem when the leased lines fail.
  • Page 100 Rate Auto Orig: Disable Nxt Disable OnFlBkTo48 OnFlBkTo72 OnFlBkTo96 OnFlBkTo120 OnFlBkTo144 OnFlBkTo168 Rate Auto Originate. Initiates a dial backup call, using the phone number in directory location 1, when the leased-line rate of the modem falls back to or below a certain speed. Disable –...
  • Page 101 COMSPHERE 3800 Series Modems AutoDialStandby: Disable Nxt Disable 15min 30min 1hr 4hr Test(2min) Adv15min Adv30min Adv1hr TestAdv2min Automatic Dial Standby. Permits a modem operating on dial lines (regardless of the method of dialing origination) to check the quality of the leased lines periodically and, if they are good, to disconnect from the dial lines and resume operations on the leased lines.

  • Page 102: V.42/Mnp/Buffer Configuration Options

    V.42/MNP/Buffer 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 (see DTE Interface configuration options group), then the V.42/MNP/Buffer group does not appear on the LCD.
  • Page 103 COMSPHERE 3800 Series Modems *Err Contrl Mode (cont.) For Async Dial and UNIX Dial, V42/MNPorBfr is the factory default. For Sync Dial and Sync Leased, DirectMode is the factory default. AT command for Buffer Mode is \N0. AT command for Direct Mode is \N1.
  • Page 104 *EC Negotiat Bfr: Disable Nxt Disable Enable Disab&Switch Error Control Negotiate Buffer. Determines if the answering modem buffers the data that it received from the remote modem during an interval in which the modem attempts to establish a connection using error control. Online changes do not take effect until a disconnect occurs.
  • Page 105 COMSPHERE 3800 Series Modems *Flw Cntl of Mdm: Disable Nxt Disable XON/XOFF RTS_to_Mdm Flow Control of Modem. Determines how the DTE controls the flow of data from the modem. Disable – The DTE cannot control the flow of data from the modem.
  • Page 106 *Break Buffr Ctl: Keep_Data Nxt Keep_Data Discard_Data Break Buffer Control. Determines if data stored in the modem’s buffer is saved or discarded when the DTE issues a break sequence. Keep Data (Nondestructive mode) – Saves the data in the buffer in both the local and remote modems. Discard Data (Destructive mode) –...
  • Page 107 COMSPHERE 3800 Series Modems *RxBuffDiscDelay: Disable Nxt 0sec 60sec Disable Receive Buffer Disconnect Delay. Determines the maximum amount of time the modem can continue to send data in its Receive Buffer to the DTE after the modem is commanded by the DTE to disconnect, or after the modem detects a line disconnect.

  • Page 108: Test Configuration Options

    Tests The Tests configuration options determine specifics, such as the duration of a test, for the various diagnostic tests available to the modem. DTE RL (CT140): Disable Nxt Disable Enable DTE Remote Loopback. Controls the use of Pin 21 of the EIA 232-D/ITU-T V.24 interface by the DTE to initiate a remote loopback.
  • Page 109 Nxt Disable (Address Values) V.54 Address. Determines which remote 3800 Series modem is placed into a remote loopback test. This can be either a remote digital loopback or local analog loopback. This type of addressing can be used for extended data circuits (tail circuits).

  • Page 110: Miscellaneous Configuration Options

    Misc The Miscellaneous configuration options determine specifics for various functions, including network management parameters and remote modem access. StrapsWhenDisc: No_Change Nxt No_Change Reload RelodNoATChg Straps When Disconnected. Determines whether or not configuration options in the Active (Saved) configuration area are reloaded to Active (Operating) when a disconnect occurs. This is useful in modem pooling applications. No Change –...
  • Page 111 Disable – Does not allow access from a remote modem. The factory default is Enable. NOTE: The remote modem must be a 3800 Series modem. AT command is S-register S55 = n, where n is 0 for Enable and 1 for Disable.
  • Page 112 *NetMngmtAddress: " 256 Nxt Network Management Address. Determines the address used when accessing a locally attached modem from the 6700 Series NMS. This configuration option is ignored by remote modems. Address values range from 001 to 256. The factory default is 256. AT command is S-register S75 = n, where n is a value from 0 to 255 (001 to 256).
  • Page 113 COMSPHERE 3800 Series Modems *NetworkPosition: Tributary Nxt Tributary Control Network Position Identification. Each modem must be identified either as a control modem or a tributary modem. NOTE: This configuration option is only applicable for leased-line network management applications. For the Model 3810 and Model 3820, Tributary is the factory default.

  • Page 114: Security Configuration Options

    Security Configuration Options The Security Configuration Options group allows you to view and set dial access security parameters. This group appears only if the dial access security feature has been installed. *EntryWait_Time: 20 sec Nxt 20 sec 10 sec 40 sec 60 sec Entry Wait Timeout.
  • Page 115 COMSPHERE 3800 Series Modems *DTE_PW_BkSpChar: 008 Nxt " 008 DTE Password Backspace Character. Sets the character that is used to perform a backspace in security mode. This character can be set to any ASCII value from 1 to 47, 58 to 64, 91 to 96, or 123 to 127.

  • Page 116: Control Branch

    Overview ............... . . Control Branch .
  • Page 117 COMSPHERE 3800 Series 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 9.
  • Page 118 Make Busy/Remove Make Busy The Make Busy function forces the modem off-hook so it cannot answer a call. This is often used with PBX systems to permit the busy out of a PBX port for rotary or hunt groups. WARNING To not violate FCC and DOC regulations, this function must only be used behind a...
  • Page 119 The second selection appearing on the LCD is To Local via DTE. This function permits firmware upgrades to be transferred to a 3800 Series 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.
  • Page 120 Modulat but are using a modulation scheme other than V.33, V.32bis, V.32, or V.29. No Response The remote modem is not a 3800 Series modem or the connection between the two modems is poor. 3810-A2-GB30-30 Access The remote modem’s Access...
  • Page 121 If this fails, contact your service representative. To Local via DTE This function is for use by Customer Service personnel only to transfer new firmware to 3800 Series modems. Automatic Firmware Download The latest 3800 Series firmware is available at no charge from the Automatic Firmware Download Center.

  • Page 122: Remote Branch

    Overview ............... . . Remote Branch .
  • Page 123 Remote 11-2 Press the Remote. If a connection is not established between a local 3800 Series modem and a remote 3800 Series modem, the LCD displays Remote Mode Fail – No Circuit. Press the Top-Level menu and dial again. <...

  • Page 124: Top-Level Menu Of A Remote 3800 Series Modem

    3800 Series modem. If this is the case, the status message No Response appears on the LCD. If a connection is established but the remote modem’s Access from Remote configuration option...
  • Page 125 COMSPHERE 3800 Series Modems 11-4 September 1998 3810-A2-GB30-30...

  • Page 126: Security

    Dial Access Security is an optional feature that allows you to control who has access to your COMSPHERE 3800 Series modem and ultimately your host DTE. 3810-A2-GB30-30 ............

  • Page 127: Originate Access Security

    COMSPHERE 3800 Series Modems Originate Access Security Originate Access lets you control who can originate a call from a local modem via the AT command set. This is useful in LAN and modem pooling applications. With Originate Access security, a local user’s password is embedded in the AT dial command.

  • Page 128: Dte-Side Passwords

    VF Password Timeout or an Unknown VF Password, first verify that the answering 3800 Series modem’s VF Prompt Type is set for 2nd Dial Tone. Next, verify that the Dial Tone Detect configuration option in the originating modem is enabled. Third, insert several Pause (,) modifiers into the dial string instead of the W modifier.

  • Page 129: Security Branch

    COMSPHERE 3800 Series Modems Security Branch The Security branch of the Top-Level menu allows you to change and save parameters that are critical to the dial access security password database. This database is a collection of passwords and their associated parameters that determine how the modems control password access.

  • Page 130: Set Access Ctrl

    Set Access Ctrl Set Access Control allows you to change security configuration. This function is protected by an Administrative Password. The Reset Security function allows you to reset the Administrative Password, but results in erasure of the modem’s security database. To access Security from the Top-Level menu, make the following selections: Idle : 19.2...
  • Page 131 COMSPHERE 3800 Series Modems EditPasswdTable The Password Table is the modem’s security database. It contains all essential information for each password stored in the modem’s nonvolatile memory. The information associated with each password is known as a record. Records are identified by an index which is a numeric name for a single record.

  • Page 132: Edit Password Table Group Options

    PsWdType xxxx Nxt Cleared DTE_Entry VF_Entry VF_plus_DTE Password Type. Indicates whether this index location is configured for VF-side password, DTE-side password, or both. Cleared displays for an index location that contains no valid entry. Note that this option only identifies the type of password used.

  • Page 133: Set Answer Security Group Options

    COMSPHERE 3800 Series Modems Set Answer Sec Set Answer Security determines if dial access security is enabled or disabled. This method of inbound security is configured in the answering modem. Although this also appears under the Security Configuration Option group in Chapter 9, it can only be changed from the Set Answer Sec LCD display in the Security branch.

  • Page 134: Set Originate Security Group Options

    Set Orig Sec Set Originate Security controls whether or not the modem can originate a call using AT commands when the dial access security feature is installed. This method of outbound security only applies to modems originating a call. Set Orig Sec No_OrigSec EnaOrigSec Set Originate Security.
  • Page 135 COMSPHERE 3800 Series Modems Set Admin PsWd Set Administrative Password is used to change the Administrative Password value. The Administrative Password is an 8-digit decimal number that allows authorized users to enter the Access Security Control function. NOTE If this value is forgotten, then the...

  • Page 136: Security Password Entry Techniques

    VF Password Timeout or an Unknown VF Password, first verify that the answering 3800 Series modem’s VF Prompt Type is set for 2nd Dial Tone. Next, verify that the Dial Tone Detect configuration option in the originating modem is enabled. Third, insert several Pause (,) modifiers into the dial string instead of the W modifier.

  • Page 137: Database Table Examples

    Originate Access Password An Originate Access password is entered by a local user to gain access to a local 3800 Series modem. This password is embedded in the AT dial command and cannot be entered from the diagnostic control panel (DCP).

  • Page 138: Security Database Table Using Dte-Side Passwords

    Table 12-5 is an example of a database table with passwords configured for DTE Entry only. This type of password is entered via the originating user’s DTE. Security Database Table Using DTE-Side Passwords Index Password 1001 winter DTE_Entry 1002 summer DTE_Entry 1003 spring...

  • Page 139: Security Database Table Using Paired Vf-Side And Dte-Side Passwords

    COMSPHERE 3800 Series Modems Table 12-7 is an example of a security database table that uses paired VF and DTE passwords for use in VF_w/_DTE answer security mode. Security Database Table Using Paired VF-Side and DTE-Side Passwords Index Password 00110001...

  • Page 140: Fax Operation

    Your 3800 Series modem supports the Class 2 (EIA/TIA SP-2388) Group III fax, using V.17, V.29, or V.27ter modulations.
  • Page 141 COMSPHERE 3800 Series Modems There are no Diagnostic Control Panel (DCP) functions unique to fax operation. If your fax software requires that you change the configuration of your modem, see the appropriate sections of Chapter 9, Configure Branch. The DCP is disabled during fax operation.

  • Page 142: At Command Set And S-Registers

    Escape Sequence and Escape Guard Time The escape sequence is only issued when the modem is online and in Data mode. The 3800 Series modem uses three consecutive plus (+) characters as the escape sequence. (To change this value, refer to S-register S2 discussed later in Table 14-2 in the S-Register Format section.)

  • Page 143: Command Guidelines

    AT. (See &Mn and &Qn commands.) Table 14-1 lists all AT commands supported by the 3800 Series modem. The first column lists the AT command. The second column defines and lists all possible values for that command. The Async Dial factory default is listed in bold.

  • Page 144: 3800 Series At Commands

    3810-A2-GB30-30 In Table 14-1, the value for X is listed in the AT Command column and the value for n is listed in the Description column. Table 14-1 (1 of 12) 3800 Series AT Commands Description ATD9W5551234 Command Telephone String...
  • Page 145 COMSPHERE 3800 Series Modems Command Dn (cont’d) W or + – Wait for dial tone. Modem waits for a second dial tone before processing the dial string. This can be the initial dial tone or a second tone received when dialing through a tandem PBX (for example, 9+555-6789), or when invoking special features (for example, 70#W555-6789, where 70# disables Call Waiting).
  • Page 146 Changes contents of S-register (where r is the S-register, and n is the new value). Sr ? Display S-Register Displays value of S-register where r is the S-register number. 3810-A2-GB30-30 Table 14-1 (3 of 12) 3800 Series AT Commands Description September 1998 AT Command Set and S-Registers Front Panel Branch Status\Identity Control\Speaker...
  • Page 147 COMSPHERE 3800 Series Modems Command Tone Dial Sets the modem for tone dial mode. Result Code Format Displays result codes in Number (1) format digits. Displays result codes as text. Displays result codes in Number (2) format (digits). Extended Result Code, Dial Tone Detect, and Busy Tone Detect...
  • Page 148 &D5 Controls TX Mute. Follows Standard RS232 operation, except that when DTR is lowered at the answering modem, the modem mutes transmitter output. 3810-A2-GB30-30 Table 14-1 (5 of 12) 3800 Series AT Commands Description September 1998 AT Command Set and S-Registers Front Panel Branch...
  • Page 149 COMSPHERE 3800 Series Modems Command &Fn Select Factory Default Configuration Options Loads factory configuration options into Active (Operating) area. &F5 and &F6 arevalid only if ETC is installed. &F0 Async Dial &F1 Sync Dial &F2 Sync Leased: Answer &F3 UNIX Dial &F4...
  • Page 150 The &L command will cause the modem to reset before entering or exiting Leased-Line mode. Therefore, it must be entered as the last command in an initialization string. 3810-A2-GB30-30 Table 14-1 (7 of 12) 3800 Series AT Commands Description September 1998 AT Command Set and S-Registers Front Panel Branch...
  • Page 151 COMSPHERE 3800 Series Modems Command &Mn Async/Sync Mode and DTE Dialer Type and &Qn &M0, &Q0 Modem operates in Asynchronous mode and uses AT Command protocol. &M1, &Q1 Modem operates in Synchronous mode and uses AT Command protocol. &M2, &Q2...
  • Page 152 To clear a telephone number from a memory location, issue the &Zn = x command without entering a telephone number. 3810-A2-GB30-30 Table 14-1 (9 of 12) 3800 Series AT Commands Description September 1998 AT Command Set and S-Registers Front Panel...
  • Page 153 COMSPHERE 3800 Series Modems Command Maximum Frame Size Error Control Negotiate Buffer Disable. Enable. Disables and switches modem to Buffer mode. CTS Control Forced On. Forces CTS to always ON. Standard RS232. Wink When Disconnect. CTS is turned Off for 1 to 2 seconds upon a disconnect.
  • Page 154 V.22bis. maximum rate 2400 bps %B1200 V.22 or Bell 212A, maximum rate 1200 bps %B300 V.21 or Bell 103, maximum rate 300 bps 3810-A2-GB30-30 Table 14-1 (11 of 12) 3800 Series AT Commands Description Flow Control of Modem Disable XON/XOFF Disable...
  • Page 155 COMSPHERE 3800 Series Modems Command %Bn (cont’d) Modulation and Data Rate can also be set using S-register S41. The following table shows the equivalent values of S41 for each %Bn value, and, where applicable, %Bn in combination with Bn. S41 = 20...

  • Page 156: S-Register List

    DTE Dialer Type configuration option is set for AT. (See &Mn command.) Table 14-2 lists all S-registers supported by the 3800 Series modems. The first column lists the S-register. The second column lists all possible values for that register. The third column lists the key sequence used to enter the equivalent from the front panel.
  • Page 157 COMSPHERE 3800 Series Modems S-Register Line Feed Character Register determines ASCII value used as the line feed character. Enter a value from 0 to 127 for the line feed character. Factory setting is 10 (ASCII carriage return or line feed).
  • Page 158 Use Directory Locations 1–10 NOTE: The modem must be in Originate mode to perform an automatic dial backup. 3810-A2-GB30-30 Table 14-2 (3 of 12) 3800 Series S-Registers Description September 1998 AT Command Set and S-Registers Front Panel Branch Configure\Edit\Tests Configure\Edit\DTE...
  • Page 159 COMSPHERE 3800 Series Modems S-Register Rate Auto Originate Initiates a dial backup call, using the phone number in directory location 1, when the leased-line rate of the modem falls back to or below a certain speed. Register has the following values:...
  • Page 160 Register controls the modem’s train time for V.32bis/V.32 mode. Register has the following values: 0 = Long 1 = Short Factory setting is Long. 3810-A2-GB30-30 Table 14-2 (5 of 12) 3800 Series S-Registers Description September 1998 AT Command Set and S-Registers Front Panel Branch Configure\Edit\ V42/MNP/Buffer Configure\Edit\Line Dialer...
  • Page 161 COMSPHERE 3800 Series Modems S-Register Leased-Line Rate Register determines the modem’s data rate and modulation scheme for operation on either 2-wire or 4-wire leased lines in either Answer or Originate mode. Register has the following values: 0, 1 = 14,400 (V.32bis) = 12,000 (V.32bis)
  • Page 162 Identifies where the modem is physically located in the network. Register has the following values: 0 = Peripheral 1 = Intermediate Factory setting is Peripheral. 3810-A2-GB30-30 Table 14-2 (7 of 12) 3800 Series S-Registers Description September 1998 AT Command Set and S-Registers Front Panel Branch Configure\Edit\Leased Line Configure\Edit\ V42/MNP/Buffer...
  • Page 163 COMSPHERE 3800 Series Modems S-Register Access From Remote Register determines if a modem’s DCP can be accessed by a remote modem. Register has the following values: 0 = Enable 1 = Disable Factory setting is Enable. Remote Access Password Register allows entry of the first pair (leftmost) of digits of a remote access password.
  • Page 164 Register has the following values: 0 = Tributary 1 = Control Factory setting is Tributary. 3810-A2-GB30-30 Table 14-2 (9 of 12) 3800 Series S-Registers Description September 1998 AT Command Set and S-Registers Front Panel Branch Configure\Edit\DTE Dialer Configure\Edit\Line Dialer Configure\Edit\Misc...
  • Page 165 COMSPHERE 3800 Series Modems S-Register Network Management Address Register determines the modem’s network address. This address is used when accessing the modem from the NMS. Enter a value from 0 (network address 001) to 255 (network address 256). Factory setting is 255.
  • Page 166 1 (or 232) = Reload 2 (or 233) = Reload with no AT Change Factory setting is No Change. 3810-A2-GB30-30 Table 14-2 (11 of 12) 3800 Series S-Registers Description September 1998 AT Command Set and S-Registers Front Panel Branch Configure\Edit\Leased Line...
  • Page 167 COMSPHERE 3800 Series Modems S-Register V.42 ARQ Window Size Increase Register allows the V.42 Automatic Request for Transmission (ARQ) window size to be set to a value from 6 to 15 frames to accommodate satellite delays. Register has the following values:...

  • Page 168: Menu Tree

    Menu Tree Overview ................Overview The following pages provide graphic representations of the general menu structure of the front panel or SDCP...
  • Page 169 COMSPHERE 3800 Series Modems Call_Setup Dial Answer Disconnect Dial_Standby Return_to_Dial Directory Locations 1 – 10 Does not appear in Remote Mode. (Rem_Digital_Loop, Loc_Digital_Loop, and Pattern appear if the secondary channel is used.) Some choices within this group may not appear depending upon how previous configuration options have been selected.
  • Page 170 from previous page Ld EditArea frm: Activ (Operating) Active (Saved) Edit from previous page Leased_Line V42/MNP/Buffer Leased Mode Err Contrl Mode V42/MNPorBfr LeasedLine Rate 19200(V32t) V42/MNPorDsc 16800(V32t) MNP or Buffr 14400(V32b) MNP or Disc 12000(V32b) BufferMode 9600(V32b) DirectMode 7200(V32b) LAPM_or_Disc 4800(V32b) LAPM_or_Buff 2400(V22bis)
  • Page 171 COMSPHERE 3800 Series Modems from previous page Control Remote Security Secondary Prim (data blckd) (ExitRem appears instead of Remote when using Remote Mode) Set_Access_Ctrl Reset_Security (Admin Password?) EditPassWdTable Set_Orig_Secur Set_Answer_Sec Set_Admin_PsWd Speaker Make_Busy Download Code RemoveMakeBusy Reset Service_Line DiscServLine 98-14436c-03...

  • Page 172: Result Codes

    Numbers (1) Numbers (2) CONNECT RING NO CARRIER ERROR CONNECT 1200* NO DIALTONE* BUSY* NO ANSWER* CONNECT 2400* CONNECT 4800* CONNECT 9600* CONNECT 12000* CONNECT 14400* CONNECT 19200** CONNECT 7200* CONNECT 16800* CONNECT 300* CONNECT 2400/ EC*** * Appears when the Extended Result Codes configuration option is enabled. ** Appears when the Extended Result Codes configuration option is set for Use_DTE_Rate.
  • Page 173 COMSPHERE 3800 Series Modems Numbers (1) Numbers (2) CONNECT 4800/ EC*** CONNECT 4800/ EC*** CONNECT 12000/ EC*** CONNECT 14400/ EC*** CONNECT 16800/ EC*** CONNECT 7200/ EC*** CONNECT 1200/ EC** CONNECT 38400** CONNECT 19200/ EC*** CONNECT 57600** CONNECT 76800** CONNECT 115200** ** Appears when the Extended Result Codes configuration option is set for Use_DTE_Rate.

  • Page 174: Troubleshooting

    ................Overview This appendix points out basic problems that can occur when operating a 3800 Series modem. Use Tables C-1 through C-6 to check out these problems. If you are having data communication difficulties, such as periodic...

  • Page 175: Modem - Dte Connection

    Verify that the originating modem is compatible. Verify that originating modem recognizes your modem’s answer tone. Verify that originating modem supports your modem’s modulation schemes. The 3800 Series modem recognizes ITU-T V.32bis, V.32, V.22bis, V.22, V.21, Bell 212A, and Bell 103J. The 3800 Series modem does not support other vendors’...
  • Page 176 Symptom Originate Mode Verify that the modem’s DTE Dialer configuration option is set to the correct setting: either AT, DTR Dialing, V.25bis Async, V.25bis Bisync, or V.25bis HDLC. Modem does not go If using AT Dialing, refer to the Table C-2, Modem – DTE Connection. off-hook and begin If using DTR Dialing, verify the telephone number stored in directory location 1, and verify that dialing...

  • Page 177: Online Operation

    COMSPHERE 3800 Series Modems Symptom Data scrambled Verify that the character format (data bits, parity, and stop bits) is set to the same value in both modems. Missing data during a Verify that you are using the same method of flow control for both the modem and the DTE.

  • Page 178: Technical Specifications

    ............. . Technical Specifications Table D-1 shows the technical specifications for the 3800 Series modems. Technical Specifications for 3800 Series Modems Specifications APPROVALS (115 Vac, 60 Hz only) FCC Part 15...
  • Page 179 COMSPHERE 3800 Series Modems Technical Specifications for 3800 Series Modems Specifications COMPATIBILITY ENVIRONMENT Operating Temperature Relative Humidity Shock and Vibration Storage Temperature DTE INTERFACE 25-pin D-subminiature connector 25-pin D-subminiature connector AC POWER REQUIREMENTS POWER CONSUMPTION Model 3810 and Model 3820...
  • Page 180 Technical Specifications for 3800 Series Modems Specifications DIMENSIONS Weight Height Width Depth TRANSMIT LEVEL Dial Line Leased Line TELEPHONE INTERFACE Dial-Line Connectivity Models 3810 and 3820 Model 3811 3810-A2-GB30-30 Table D-1 (3 of 4) Description 2.5 pounds (1.14 kg) Model 3810 and Model 3820 (not including power transformer) 1.0 pounds (0.45 kg) Model 3811...
  • Page 181 COMSPHERE 3800 Series Modems Technical Specifications for 3800 Series Modems Specifications LEASED-LINE CONNECTIVITY Model 3810 Model 3820 Model 3811 VOICE FREQUENCY LINE REQUIREMENTS DATA RATES Dial Line Leased Line ERROR CONTROL DATA COMPRESSION Table D-1 (4 of 4) Description 6-pin center pair leased jack...

  • Page 182: Pin Assignments

    Overview ................VF Connector Pin Assignments EIA-232-D Pin Assignment EIA RS-366-A Pin Assignments...

  • Page 183: Vf Connector Pin Assignments: Models 3810 And 3820

    COMSPHERE 3800 Series Modems VF Connector Pin Assignments: Models 3810 and 3820 3810 Phone/Leased Connector (J6) 4-Wire Transmit Leased Line/ 2-Wire Leased Line 4-Wire Transmit Leased Line/ 2-Wire Leased Line Phone-Ring Phone-Tip 4-Wire Receive Leased Line 4-Wire Receive Leased Line...

  • Page 184: Eia-232-D Pin Assignments

    EIA-232-D Pin Assignments Table E-3 lists the EIA-232-D pin assignments for the modem. RS-232 Name ITU-T Circuit — +10V — –10V — — — CT112 — — — — — — CT141 CT140 CT111 XTXC TEST 3810-A2-GB30-30 Table E-3 EIA-232-D Pin Assignments Signal Source —...

  • Page 185: Eia Rs-366-A Pin Assignments

    COMSPHERE 3800 Series Modems EIA RS-366-A Pin Assignments Table E-4 lists the EIA-366-A pin assignments for the modem. RS-366-A Name Table E-4 EIA RS-366-A Pin Assignments ITU-T Signal Source September 1998 Definition Digit Present Abandon Call and Retry Call Request...

  • Page 186: Itu-T V.25Bis Dialing Commands And Response

    As commands are entered from the DTE, the 3800 Series modems issue a response to the DTE which indicates if the call failed or connected, or if the command is valid or invalid.

  • Page 187: Call Answer Commands

    COMSPHERE 3800 Series Modems , or < User-Defined Pause & Flash Hook = or > Delimiters Call Request with Stored Memory Address Provided (CRS) The CRS command dials the telephone number stored in the request directory location. CRS is similar to the ATDS command.

  • Page 188: Command Response

    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.

  • Page 189: V.25Bis Commands

    COMSPHERE 3800 Series Modems Table F-1 lists V.25bis commands supported by the 3800 Series modems. V.25bis Command Call Request with Number Provided Call Request with Memory Address Incoming Call Indication Disregard Incoming Call Connect Incoming Call Program Normal Request to List Stored Number V.25bis Command...

  • Page 190: Default Configuration Options

    Default Configuration Options Overview ................Overview Table G-1 in this appendix lists all default configuration options for the four factory preset...

  • Page 191: Factory Default Configuration Options

    COMSPHERE 3800 Series Modems Async Dial and UNIX Configuration Option Dial Default Settings DTE DIALER DTE Dialer Type AT Escape Character 043 ASCII Escape Guard Time 1sec Break Forces Escape Disable Command Character Echo Enable Carriage Return Character 013 ASCII...
  • Page 192 Async Dial and UNIX Configuration Option Dial Default Settings DIAL LINE Dial Line Rate 19200(V32t) V.32bis Automode Enable V.32bis Autorate Enable Dial Transmit Level Permissive – 9 dBm V.22bis Guard Tone Disable V.32bis Train Long LEASED LINE Leased Mode Leased Line Rate V.32bis Autorate Leased Transmit Level 1800 Hz Train Tone...
  • Page 193 COMSPHERE 3800 Series Modems Async Dial and UNIX Configuration Option Dial Default Settings TESTS DTE RL (CT140) Disable DTE LL (CT141) Disable Test Timeout Disable Receive Remote Loopback Enable V.54 Address Disable V.54 Device Type MISC Straps When Disconnect No Change...

  • Page 194: Equipment List

    Model 3820 (220–240V) Fax Option 6-position, 4-wire modular cord, 7-foot length 8-position, 8-wire modular cord, 14-foot length 8-position to 6-position (JM8 to RJ11) crossover modular cord 3810-A2-GB30-30 Equipment List Feature/Part Number September 1998 3810-A1-001 3810-A1-301 3811-B1-001 3820-A1-001 3820-A1-301 3800-C1-008 125-0067-0031 125-0053-1431 125-0054-1531...
  • Page 195 COMSPHERE 3800 Series Modems September 1998 3810-A2-GB30-30...

  • Page 196: Glossary

    Active (Operating) A configuration area containing configuration options currently in use by the modem. When a power cycle occurs, a reset is performed, or a save is issued using the DCP, this area is updated with the contents of Active (Saved). Active (Saved) A nonvolatile configuration area containing the most recently saved configuration options.
  • Page 197 1; communication over the dial network continues with the remote modem. For a 3800 Series modem to perform this properly, the telephone number in directory location 1 must be the telephone number at the remote site.
  • Page 198 circuit pack lock A screw lock tab installed over a circuit card’s latch release tab to prevent the unit from being removed without a tool. It is used on SDUs, modems, and filler panels. Class 1 fax A fax modem standard. Under Class 1 computer software handles most of the protocol, compression, and conversion tasks.
  • Page 199 COMSPHERE 3800 Series Modems The equipment (Data Communications Equipment or Data Circuit Terminating Equipment) that provides the functions required to establish, maintain, and end a connection. This equipment also provides the signal conversion required for communication between the DTE and the telephone line. A modem is a DCE.
  • Page 200 EPROM Erasable programmable read-only memory. error control An algorithm used to correct data transmission errors. escape sequence Default setting is +++. This sequence lets you switch your modem from Data mode to Command mode. extended result codes An asynchronous message (in either numbers or words) that includes VF data rate and error control information the modem sends to the DTE after executing or trying to execute a command.
  • Page 201 Line Signal Detect. A signal between the DTE and modem indicating energy exists on the transmission circuit. menu tree The structure containing the 3800 Series menu hierarchy starting at a Top-Level menu and extending down to various modem functions. Glossary-6...
  • Page 202 This protocol (Microcom Networking Protocol) detects and corrects data errors caused by telephone line noise and signal distortion. MNP5 includes data compression. modem (Modulator/DEModulator). A device that transforms signals from digital to analog form and vice versa. modulation The process of varying some characteristics (usually amplitude, frequency, and/or phase) of a carrier wave to form data transmissions.
  • Page 203 COMSPHERE 3800 Series Modems pulse dialing One of two dialing methods, in which telephone numbers are sent as pulses (brief changes in voltage or current intensity) across the telephone line. Rotary telephones use pulse dialing. register A part of the modem’s memory that contains values that determine the modem’s operating characteristics.
  • Page 204 Sync Dial A factory preset configuration area containing configuration options most often used in synchronous dial networks. synchronous transmission Data transmission that is synchronized by timing signals. Characters are sent at a fixed rate. This type of transmission is more efficient than asynchronous transmission. tone dialing One of two dialing methods, in which telephone numbers are sent as tones across the telephone lines.
  • Page 205 COMSPHERE 3800 Series Modems Glossary-10 September 1998 3810-A2-GB30-30...
  • Page 206 Numbers 1800 Hz Training Tone, 9-29 1800 Hz Training Tone (S34), 14-17 2W Leased Line SQ Retrain, 9-29, 14-25 A/ (Repeat Last Command), 14-3 Abort (Test branch), 8-2 ac power connection, 2-7 requirements, D-2 Access from Remote, 9-42 Access From Remote (S55), 14-22 Active (Operating) configuration area, 9-1 Active (Saved) configuration area, 9-1 Administrative Password, 12-5, 12-10...
  • Page 207 COMSPHERE 3800 Series Modems Auto Redial (DTR), 14-18 Auto Redial (Leased Line), 14-17 Auto–Answer Ring Number (S0), 14-15 Auto-Answer Ring Count, 9-20 Automatic Firmware Download Center, 10-6 Automatic Make Busy, 9-24 automatic redialing, 9-19, 9-24, 9-31, 14-18 AutoSync, 14-10 Backspace Character, 9-17...
  • Page 208 disabled commands, 9-41 Disconnect, 5-3 display, revision, serial, model numbers, 14-5 Download Code, 10-4 download failure, 10-6 download latest firmware, 10-6 DSR Control, 9-10, 9-11 DSR Control (&S), 14-10 DTE connection, 2-6 DTE Dialer Type, 9-15 DTE Dialer Type (&M, &Q), 14-10 DTE Interface, 9-7 DTE LL (S52), 14-21 DTE Local Loopback, 9-39...
  • Page 209 COMSPHERE 3800 Series Modems LCD display, 4-6 LdEditAreafrm, 9-5 Leased Line Carrier On Level (S48), 14-21 Leased Line mode, 14-9 Leased Line Rate, 9-28, 14-20 Leased Line Transmit Level, 9-29 Leased Mode, 9-28 Leased TX Level (S45), 14-20 leased-line connection, 2-4...

  • Page 210: B-1 Result Codes

    Reset, 10-2 Reset and Load Active (Z), 14-7 Reset Security, 12-10 Result Codes Enable/Disable, 9-17 enable/disable, 14-5 extended, 14-6 format, 14-6 list, B-1 Result Codes Format, 9-18 retrain, 2W Leased Line Signal Quality, 9-29 rings before answer, 14-15 RS366A status, 7-4 RTS Action, 9-11, 14-10 RTS/CTS Delay, 9-12, 9-13 RTS/CTS Delay (S26), 14-17...
  • Page 211 COMSPHERE 3800 Series Modems Talk mode, 6-2 Talk/Data branch, 6-1 technical specifications, D-1 telephone connection, 2-7 telephone numbers, entering, 5-5 Test branch, 8-2 Test Timeout, 9-39 Test Timeout (S18), 14-17 Tests (&T), 14-11 top-level menu, 4-8 Transmit Buffer Disconnect Delay, 9-37...
  • Page 212 – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – –...
  • Page 213 *3810-A2-GB30-30* *3810–A2–GB30–30*...

This manual is also suitable for:

Comsphere 3810Comsphere 3811Comsphere 3820

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