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Paradyne 3821PLUS manual

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Table of contents for the manual

  • Page 1

    COMSPHERE 3821 P LUS MODEM USER’S GUIDE Document No. 3821-A2-GB20-40 January 1999[...]

  • Page 2

    COMSPHERE 3821 Plus Modem A January 1999 3821-A2-GB20-40 COMSPHERE 3821 Plus Modem User ’s Guide 3821-A2-GB20-40 5th Edition (January 1999) Changes and enhancements to the product and to the information herein will be documented and issued as a new release or a limited revision of this manual. For the 3821 Plus modem the USOC for Permissive mode [...]

  • Page 3

    Safety Instructions B 3821-A2-GB20-40 January 1999 ! Important Safety Instructions 1. Read and follow all warning notices and instructions marked on the product or included in the manual. 2. Slots and openings in the cabinet are provided for ventilation. T o ensure reliable operation of the product and to protect it from overheating, these slots an[...]

  • Page 4

    COMSPHERE 3821 Plus Modem C January 1999 3821-A2-GB20-40 Notices                    ?[...]

  • Page 5

    Safety Instructions D 3821-A2-GB20-40 January 1999 Government Requirements and Equipment Return Certain governments require that instructions pertaining to modem connection to the public switched telephone network be included in the installation and operation manual. Specific instructions are listed in the following sections. United States Notice t[...]

  • Page 6

    COMSPHERE 3821 Plus Modem E January 1999 3821-A2-GB20-40 Canada Notice to Users of the Canadian Public Switched T elephone Network The Canadian Department of Communications label identifies certified equipment. This certification means that the equipment meets certain telecommunications network protective, operational and safety requirements. The D[...]

  • Page 7

    Safety Instructions F 3821-A2-GB20-40 January 1999 This modem is suitable for connection to BT circuits with signalling at a nominal frequency of 2280 Hz and may be connected to multipoint or point-to-point circuits. The apparatus does not require signalling or otherwise use the frequency range 0 –200 Hz. No d.c. interaction is intended between t[...]

  • Page 8

    COMSPHERE 3821 Plus Modem G January 1999 3821-A2-GB20-40 This page intentionally left blank.[...]

  • Page 9

    i 3821-A2-GB20-40 January 1999 T able of Contents Preface Objectives and Reader Assumptions v . . . . . . . . . . . . . . . . . . . . . . . . . How to Use This Manual v . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Related Documents vi . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1. Introduction [...]

  • Page 10

    COMSPHERE 3821 Plus Modem ii January 1999 3821-A2-GB20-40 4. A T Commands and S-Registers Overview 4-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Operating Modes 4-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Command Guidelines 4-2 . . . . . . . . . . . . . . . . [...]

  • Page 11

    T able of Contents iii 3821-A2-GB20-40 January 1999 D. T echnical Specifications E. Pin Assignments EIA-232-E Pin Assignments E-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . JM8 to RJ1 1 Crossover Cable E-2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . NIM Cable Pin Assignments E-3 . . . . . . . . . . . . . . . . . .[...]

  • Page 12

    COMSPHERE 3821 Plus Modem iv January 1999 3821-A2-GB20-40 This page intentionally left blank.[...]

  • Page 13

    v 3821-A2-GB20-40 January 1999 Preface Objectives and Reader Assumptions This guide describes how to install the 3821 Plus circuit card and operate the 3821 Plus modem. It is intended for all users of the 3821 Plus modem. Each 3821 Plus card comprises three modems. In general this guide refers to the 3821 Plus modem with regard to operation and the[...]

  • Page 14

    COMSPHERE 3821 Plus Modem vi January 1999 3821-A2-GB20-40 Related Documents 3000-A2-GA31 COMSPHERE 3000 Series Carrier Installation Manual 3980-A2-GB30 COMSPHERE 3800Plus Modems, User ’ s Guide 6700-A2-GY31 COMSPHERE 6700 Series Network Management System, User ’ s Guide 6800-A2-GE26 COMSPHERE 6800 Series Network Management System, User ’ s/Sy[...]

  • Page 15

    1-1 3821-A2-GB20-40 January 1999 Introduction Overview 1-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Features 1-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [...]

  • Page 16

    COMSPHERE 3821 Plus Modem 1-2 January 1999 3821-A2-GB20-40 • Storage of up to 10 telephone numbers to directory locations. • Originate Security and three Answer Security modes. • Callback Security with telephone directory index or telephone number . • T wo factory-defined configurations and two user -defined configuration areas. Status Indi[...]

  • Page 17

    Introduction 1-3 3821-A2-GB20-40 January 1999 T able 1-1 3821 Plus LEDs Label Color Indicates ALRM A red Alarm A ON: Modem A has detected a problem with its operation. ALRM B red Alarm B ON: Modem B has detected a problem with its operation. ALRM C red Alarm C ON: Modem C has detected a problem with its operation. Mod A green Modem A ON: The status[...]

  • Page 18

    COMSPHERE 3821 Plus Modem 1-4 January 1999 3821-A2-GB20-40 SDCP Operation The SDCP on the 3000 Series Carrier is the user interface to all functions used to configure and control the 3821 Plus modem. This interface includes the status LEDs, and a two-line, 32-character Liquid Crystal Display (LCD) and keypad ( Figure 1-2 ). F1 Idle:33.6 > MDMA m[...]

  • Page 19

    2-1 3821-A2-GB20-40 January 1999 3821 Plus Modem Installation Overview 2-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3821 Plus Installation 2-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [...]

  • Page 20

    COMSPHERE 3821 Plus Modem 2-2 January 1999 3821-A2-GB20-40 P26 P25 P24 P23 P20 P19 J2 P22 J1 P21 495-14854 TO P23 OR P25 TO P24 OR P26 NETWORK INTERF ACE MODULE (NIM) NIM COVER ST ANDOFF Figure 2-1. Installing the NIM Install the NIM A NIM can be installed on the left or right side of the back of the 3000 Series Carrier . " Procedure 1. If you[...]

  • Page 21

    3821 Plus Modem Installation 2-3 3821-A2-GB20-40 January 1999 Attach the DTE Interface Assembly The eight-slot DTE interface assembly can be mounted on the left or the right side of the carrier . If you are installing only one interface assembly , it must be mounted on the same side you installed the NIM. " Procedure 1. Feed the eight tabs at [...]

  • Page 22

    COMSPHERE 3821 Plus Modem 2-4 January 1999 3821-A2-GB20-40 Install the Circuit Card Slide the 3821 Plus card into its slot in the 3000 Series Carrier . Press firmly until the back edge of the card seats in the socket of the DTE interface assembly . Figure 2-4 shows circuit cards in a carrier in which the NIM and DTE interface assembly were installe[...]

  • Page 23

    3821 Plus Modem Installation 2-5 3821-A2-GB20-40 January 1999 Install Communications Software A computer commands and controls a modem through communications software. This software uses the A T command set to send instructions to the modem. A dumb asynchronous terminal, however , does not require this software since it can directly send A T comman[...]

  • Page 24

    COMSPHERE 3821 Plus Modem 2-6 January 1999 3821-A2-GB20-40 5. Press the key until the appropriate factory preset appears on the LCD, and press the corresponding function key to select your choice. 6. Choose Function appears and displays the Edit and Save functions. 7. Press the F3 key (Save) to save the new factory preset configuration to one of th[...]

  • Page 25

    3821 Plus Modem Installation 2-7 3821-A2-GB20-40 January 1999 T o change a factory template using A T commands, perform the following steps (for more information on changing factory templates using A T commands, refer to Chapter 4, A T Commands and S-Registers ). " Procedure 1. Use the A T&F&W command to load the appropriate factory co[...]

  • Page 26

    COMSPHERE 3821 Plus Modem 2-8 January 1999 3821-A2-GB20-40 This page intentionally left blank.[...]

  • Page 27

    3-1 3821-A2-GB20-40 January 1999 SDCP Menus Menu Structure 3-2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Modem Status Messages 3-3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .[...]

  • Page 28

    COMSPHERE 3821 Plus Modem 3-2 January 1999 3821-A2-GB20-40 Menu Structure An elaborate menu of options is available from a Shared Diagnostic Control Panel (SDCP). The menu tree is a hierarchical structure used to display functions that configure and control local and remote 3821 Plus modems. It is accessed via the SDCP and is shown in its entirety [...]

  • Page 29

    SDCP Menus 3-3 3821-A2-GB20-40 January 1999 Modem Status Messages Access to all menu tree branches from the SDCP begins at the T op-Level menu, the head of the menu hierarchy . The LCD’ s top line identifies the modem status, as listed in T able 3-1 , while the bottom line displays the main menu tree branches and operational and dial access secur[...]

  • Page 30

    COMSPHERE 3821 Plus Modem 3-4 January 1999 3821-A2-GB20-40 T able 3-1 (2 of 3) T op-Level Menu Status Normal Call Setup Messages Indicates Off Hook The modem is off-hook and waiting to dial a telephone number . Dialing The remote modem is being dialed. T raining The modem is training or retraining. EC Negotiating The local and remote modems are neg[...]

  • Page 31

    SDCP Menus 3-5 3821-A2-GB20-40 January 1999 T able 3-1 (3 of 3) T op-Level Menu Status Call Disconnect Messages, continued Indicates LongSpace Disc The modem has disconnected due to the detection of a long space. NoData Disc The modem has disconnected due to a lack of transmitted and received data. Disconnecting The modem has begun the disconnect s[...]

  • Page 32

    COMSPHERE 3821 Plus Modem 3-6 January 1999 3821-A2-GB20-40 T able 3-3 Dial Access Security Messages Dial Access Security Messages Indicates Get VF PsWd The answering modem is waiting for the originating caller to transmit a VF password. Get DTE PsWd The answering modem is waiting to receive a valid DTE password from the remote DTE. VF PsWd T imeout[...]

  • Page 33

    SDCP Menus 3-7 3821-A2-GB20-40 January 1999 Modem Select Branch The Modem Select branch is the top level of the menu structure. The modem selections are displayed when the SDCP is first connected to a 3800 Plus card (using the Select key on the SDCP). F1 Idle : 33.6 > MDMA mdmb mdmc F2 F3 Press F1, F2, or F3 to connect the SDCP to modem A, B, or[...]

  • Page 34

    COMSPHERE 3821 Plus Modem 3-8 January 1999 3821-A2-GB20-40 ffff Displays the modem’ s modulation scheme as shown below: V34 indicates V .34 family modulation. V32t indicates V .32 terbo modulation. V32b indicates V .32bis modulation. V32 indicates V .32 modulation. V22b indicates V .22bis modulation. V27b indicates V .27bis modulation. V33 indica[...]

  • Page 35

    SDCP Menus 3-9 3821-A2-GB20-40 January 1999 Call Setup Branch The Call Setup branch of the T op-Level menu allows you to dial, disconnect, and answer telephone calls. It also allows you to create and store up to 10 telephone numbers to directory locations. Four different functions can appear under Call Setup: • Dial • Disconnect • Answer • [...]

  • Page 36

    COMSPHERE 3821 Plus Modem 3-10 January 1999 3821-A2-GB20-40 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 10 telephone numbers. Each directory location can accept up to 40 characters; this includes the telephone number and dial command modi[...]

  • Page 37

    SDCP Menus 3-1 1 3821-A2-GB20-40 January 1999 Status Branch The Status branch of the T op-Level menu allows you to view the current status of the dial or leased-line connection, the DTE interface, and the identity (for example, serial number and model number) of your equipment. The selections under Status are: • VF • Identity • DTE • SDC ?[...]

  • Page 38

    COMSPHERE 3821 Plus Modem 3-12 January 1999 3821-A2-GB20-40 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. T o access Identi[...]

  • Page 39

    SDCP Menus 3-13 3821-A2-GB20-40 January 1999 T o exit this function and remain in the Status branch, press the key . T o exit and return to the T op-Level menu, press the key . T est Branch The T est branch of the T op-Level menu allows you to initiate various modem tests. Use these tests if you are having data communication problems, such as perio[...]

  • Page 40

    COMSPHERE 3821 Plus Modem 3-14 January 1999 3821-A2-GB20-40 If the T est Timeout configuration option is enabled, T est Timeout appears at the conclusion of the test. If it is disabled, the test operates until aborted. For more information on the T est Timeout configuration option, refer to T able 3-10 in this chapter . A Ring Indicate during this [...]

  • Page 41

    SDCP Menus 3-15 3821-A2-GB20-40 January 1999 T o exit this function and remain in the T est branch, press the key . T o exit and return to the T op-Level menu, press the key . Configure Branch After installing a 3821 Plus modem, you set its software configuration options using either the SDCP or the A T command set. This section describes how to ac[...]

  • Page 42

    COMSPHERE 3821 Plus Modem 3-16 January 1999 3821-A2-GB20-40 Activ (Operating) Active (Saved) Customer1 Customer2 Factory Async_Dial Sync_Dial Sync_Leased UNIX_Dial Choose Mode Answ er Originate Ld EditArea frm: Edit Sav e Choose Function Active (Sa ved) Customer1 Customer2 DTE_Interface DTE_Dialer Line_Dialer Dial_Line Leased_Line V42/MNP/Buffer T [...]

  • Page 43

    SDCP Menus 3-17 3821-A2-GB20-40 January 1999 Scroll to and select the Misc configuration options group. F1 Edit StrapGroup < T est Misc F2 F3 F1 StrapsWhenDisc > Nxt No_Change F2 F3 Select Nxt until RemAccssPasswrd appears. F1 RemAccssPasswrd Nxt ąĄ ° 0 0000000 F2 F3 Select the F2 ( ° ) key to increment password values. F1 RemAccssPasswrd[...]

  • Page 44

    COMSPHERE 3821 Plus Modem 3-18 January 1999 3821-A2-GB20-40 • The key causes you to exit the Configure branch and return to the T op-Level menu. If any changes are made to configuration options, the SDCP allows you to save these changes to either the Active (Saved), Customer 1, or Customer 2 configuration areas. • The and keys move selections a[...]

  • Page 45

    SDCP Menus 3-19 3821-A2-GB20-40 January 1999 T able 3-4 (1 of 6) DTE Interface Configuration Options Async/Sync Mode: Async Nxt Async Sync Asynchronous/Synchronous Mode. Determines whether the modem operates in Asynchronous mode or Synchronous mode. If the A T command set is enabled and this configuration option is set for Sync, then the modem oper[...]

  • Page 46

    COMSPHERE 3821 Plus Modem 3-20 January 1999 3821-A2-GB20-40 T able 3-4 (2 of 6) DTE Interface Configuration Options Asyn Parity Bit: None Nxt None Even Odd Mark Space This configuration option only appears if Async/Sync Mode is configured for Async or DTE Dialer T ype is enabled. Asynchronous Parity Bit. Determines type of asynchronous parity bit. [...]

  • Page 47

    SDCP Menus 3-21 3821-A2-GB20-40 January 1999 T able 3-4 (3 of 6) DTE Interface Configuration Options DTR Action: Ignore Nxt Stndrd_RS232 Ignore CntrlsOnHook Off=ReloadStrp Off=CmdMode Data T erminal 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[...]

  • Page 48

    COMSPHERE 3821 Plus Modem 3-22 January 1999 3821-A2-GB20-40 T able 3-4 (4 of 6) DTE Interface Configuration Options RTS Action: Ignore Nxt Ignore Stndrd_RS232 Sim_Cntl_Car Request-to-Send Action. RTS is a signal from the DTE to the modem indicating the DTE has data to send to the modem. Ignore – Modem assumes RTS is always ON. Use this selection [...]

  • Page 49

    SDCP Menus 3-23 3821-A2-GB20-40 January 1999 T able 3-4 (5 of 6) DTE Interface Configuration Options RTS/CTS Delay: 0 msec Nxt 0msec 10msec 50msec 150msec 600msec Request-to-Send/Clear-to-Send Delay . RTS/CTS Delay sets the delay time between the modem receiving R TS from the DTE and the modem sending CTS to the DTE. This delay is only valid in Asy[...]

  • Page 50

    COMSPHERE 3821 Plus Modem 3-24 January 1999 3821-A2-GB20-40 T able 3-4 (6 of 6) DTE Interface Configuration Options TX Clock Source: Internal Nxt Internal External RXC_Loop This configuration option only appears when Async/Sync Mode is configured for Sync. T ransmit Clock Source. Determines the source of timing for synchronous data transmitted from[...]

  • Page 51

    SDCP Menus 3-25 3821-A2-GB20-40 January 1999 DTE Dialer The DTE Dialer configuration options establish the DTE-to-modem protocol for call establishment and control. T able 3-5 shows each DTE Dialer configuration option as it appears on the LCD. T able 3-5 (1 of 5) DTE Dialer Configuration Options DTE Dialer T ype: A T Nxt A T Disable V25bis_Async V[...]

  • Page 52

    COMSPHERE 3821 Plus Modem 3-26 January 1999 3821-A2-GB20-40 T able 3-5 (2 of 5) DTE Dialer Configuration Options *Escape GuardTim: 1sec Nxt 1sec 200msec 400msec 600msec 800msec 2sec Escape Guard T ime. Determines the length of the required pause before and after the escape sequence is issued. The guard time prevents the modem from interpreting data[...]

  • Page 53

    SDCP Menus 3-27 3821-A2-GB20-40 January 1999 T able 3-5 (3 of 5) DTE Dialer Configuration Options *Linefeed Char: 010 ASCI Nxt ↑ 010 ASCI Line Feed Character . Sets the character used to perform a line feed in Command mode for responses from the modem. The factory default is 010 (ASCII line feed character). A T command equivalent is S-register S4[...]

  • Page 54

    COMSPHERE 3821 Plus Modem 3-28 January 1999 3821-A2-GB20-40 T able 3-5 (4 of 5) DTE Dialer Configuration Options *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. T[...]

  • Page 55

    SDCP Menus 3-29 3821-A2-GB20-40 January 1999 T able 3-5 (5 of 5) DTE Dialer Configuration Options V25bis IdleFill: Mark Nxt Mark Flag 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. NOTE: This configuration option only appears if DTE Dialer [...]

  • Page 56

    COMSPHERE 3821 Plus Modem 3-30 January 1999 3821-A2-GB20-40 Line Dialer The Line Dialer configuration options establish parameters used by the modem to answer or originate calls. T able 3-6 shows each Line Dialer configuration option as it appears on the LCD. T able 3-6 (1 of 4) Line Dialer Configuration Options AutoAnswerRing#: 1 Nxt 1 Disable 246[...]

  • Page 57

    SDCP Menus 3-31 3821-A2-GB20-40 January 1999 T able 3-6 (2 of 4) Line Dialer Configuration Options BusyT one Detect: Enable Nxt Enable Disable Busy T one Detect. Sets the modem to monitor for Busy T one (Enable) or ignore Busy T one (Disable). This configuration option is normally enabled; however , if the modem receives false busy tones, this conf[...]

  • Page 58

    COMSPHERE 3821 Plus Modem 3-32 January 1999 3821-A2-GB20-40 T able 3-6 (3 of 4) Line Dialer Configuration Options 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 when it goes on-hook. Issuing a long space is one method of disconnecting a[...]

  • Page 59

    SDCP Menus 3-33 3821-A2-GB20-40 January 1999 T able 3-6 (4 of 4) Line Dialer Configuration Options NoDataDiscT rig: TXD and RXD Nxt TXD and RXD TXD Only RXD Only TXD or RXD No Data Disconnect T rigger Signal. Works in conjunction with No Data Disconnect (T), and determines whether Pin 2 (transmit data) or Pin 3 (receive data) of the modem’s RS-2[...]

  • Page 60

    COMSPHERE 3821 Plus Modem 3-34 January 1999 3821-A2-GB20-40 Dial Line The Dial Line configuration options are used to configure the modem for operation over dial lines. T able 3-7 shows each Dial Line configuration option as it appears on the LCD. The Dial Line configuration group does not appear if the modem is configured with the Sync Leased fact[...]

  • Page 61

    SDCP Menus 3-35 3821-A2-GB20-40 January 1999 T able 3-7 (2 of 3) Dial Line Configuration Options Automode: Enable Nxt Enable Disable System 85 Automode. Allows the modem to automatically detect the remote modem’s modulation. Enable – The modem automatically adapts to the modulation scheme and line rate of the remote modem, and the VF line condi[...]

  • Page 62

    COMSPHERE 3821 Plus Modem 3-36 January 1999 3821-A2-GB20-40 T able 3-7 (3 of 3) Dial Line Configuration Options V22b Guard T one: Disable Nxt Disable 550Hz 1800Hz V .22bis Guard T one. Determines whether the V .22bis guard tone is disabled, set to 550 Hz, or set to 1800 Hz. Disable – No guard tone. 550 Hz or 1800 Hz – When the modem is in Answe[...]

  • Page 63

    SDCP Menus 3-37 3821-A2-GB20-40 January 1999 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 if the &L1, &L2, &L3, or &L4 command is entered. [...]

  • Page 64

    COMSPHERE 3821 Plus Modem 3-38 January 1999 3821-A2-GB20-40 T able 3-8 (2 of 2) Leased Line Configuration Options Autorate: Enable Nxt Enable Disable Autorate. The modems adapt to VF line condition and connect at the optimum rate during initial line establishment. Once connected, the modem automatically lowers the line rate if line conditions becom[...]

  • Page 65

    SDCP Menus 3-39 3821-A2-GB20-40 January 1999 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 op[...]

  • Page 66

    COMSPHERE 3821 Plus Modem 3-40 January 1999 3821-A2-GB20-40 T able 3-9 (2 of 5) V .42/MNP/Buffer Configuration Options V42bis Compress: Enable Nxt Enable Disable This configuration option only appears if Async/Sync Mode is configured for Async and the Error Control Mode configuration option is set for V42/MNPorBfr or V42/MNPorDsc. V .42bis Compress[...]

  • Page 67

    SDCP Menus 3-41 3821-A2-GB20-40 January 1999 T able 3-9 (3 of 5) V .42/MNP/Buffer Configuration Options Flw Cntl of DTE: CTS_to_DTE Nxt CTS_to_DTE Disable XON/XOFF This configuration option only appears if Async/Sync Mode is configured for Async. Flow Control of DTE. Determines how the modem controls the flow of data from the DTE. CTS to DTE – Me[...]

  • Page 68

    COMSPHERE 3821 Plus Modem 3-42 January 1999 3821-A2-GB20-40 T able 3-9 (4 of 5) V .42/MNP/Buffer Configuration Options Mdm/Mdm FlowCtl: Disable Nxt Disable Enable This configuration option only appears if Async/Sync Mode is configured for Async and the Flow Control configuration option is configured for XON/XOFF . Modem-to-Modem Flow Control. If a [...]

  • Page 69

    SDCP Menus 3-43 3821-A2-GB20-40 January 1999 T able 3-9 (5 of 5) V .42/MNP/Buffer Configuration Options TXBuffDiscDelay: 10sec Nxt 10sec Disable 60sec This configuration option only appears when Async/Sync Mode is configured for Async, and Error Control Mode is not configured for DirectMode. T ransmit Buffer Disconnect Delay . Determines how long t[...]

  • Page 70

    COMSPHERE 3821 Plus Modem 3-44 January 1999 3821-A2-GB20-40 T est The T est configuration options determine specifics, such as the duration of a test, for the various diagnostic tests available to the modem. T able 3-10 shows each T est configuration option as it appears on the LCD. T able 3-10 T est Configuration Options T est Timeout: Disable Nxt[...]

  • Page 71

    SDCP Menus 3-45 3821-A2-GB20-40 January 1999 Misc The Miscellaneous configuration options determine specifics for various functions, including network management parameters and remote modem access. T able 3-1 1 shows each Misc (Miscellaneous) configuration option as it appears on the LCD. T able 3-1 1 (1 of 2) Miscellaneous Configuration Options St[...]

  • Page 72

    COMSPHERE 3821 Plus Modem 3-46 January 1999 3821-A2-GB20-40 T able 3-1 1 (2 of 2) Miscellaneous Configuration Options NetMngmtAddress: 256 Nxt  256 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 f[...]

  • Page 73

    SDCP Menus 3-47 3821-A2-GB20-40 January 1999 Security Configuration Options The Security configuration options group is described in Chapter 7, Security . Control Branch The Control branch of the T op-Level menu allows you to manage hardware and software functions, such as speaker volume, reset, busy out, and firmware download. The 3821 Plus modem [...]

  • Page 74

    COMSPHERE 3821 Plus Modem 3-48 January 1999 3821-A2-GB20-40 Download Code The Download Code function allows firmware to be loaded into a modem from another modem or from a DTE. There are two selections under Download Code: Clone to Remote and T o Local via DTE. Clone to Remote is used to transfer an exact copy of the firmware currently stored in a [...]

  • Page 75

    SDCP Menus 3-49 3821-A2-GB20-40 January 1999 Automatic Firmware Download New releases may be available for the 3821 Plus modem. The latest 3821 Plus firmware is avaiable at no charge from the Automatic Firmware Download Center . Refer to page A in the front of this document for contact information. T o download the firmware, your modem must be conf[...]

  • Page 76

    COMSPHERE 3821 Plus Modem 3-50 January 1999 3821-A2-GB20-40 This page intentionally left blank.[...]

  • Page 77

    4-1 3821-A2-GB20-40 January 1999 A T Commands and S-Registers Overview 4-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Operating Modes 4-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .[...]

  • Page 78

    COMSPHERE 3821 Plus Modem 4-2 January 1999 3821-A2-GB20-40 T o enter online Command mode while in Data mode, enter the following sequence: TYPE: +++ Use the O command to return to Data mode from online Command mode. Enter the following command: TYPE: AT O PRESS: Enter Command Guidelines Review the following guidelines before using any A T Commands.[...]

  • Page 79

    A T Commands and S-Registers 4-3 3821-A2-GB20-40 January 1999 T able 4-1 (1 of 13) 3821 Plus A T Commands *** – A T Command Recovery Mode Allows the modem to remain in Asynchronous data mode so that A T commands can be used to change the modem’s current configuration. Use this command when A T commands are disabled or the modem is operating in [...]

  • Page 80

    COMSPHERE 3821 Plus Modem 4-4 January 1999 3821-A2-GB20-40 T able 4-1 (2 of 13) 3821 Plus A T Commands D n , continued R – Reverse Dial mode. Causes the originating modem to send out an answertone once it no longer detects ringback. (Ringback is the ring you hear at the originating site when making a call.) The R parameter must be the last charac[...]

  • Page 81

    A T Commands and S-Registers 4-5 3821-A2-GB20-40 January 1999 T able 4-1 (3 of 13) 3821 Plus A T Commands P – Pulse Dial Sets the modem for Pulse Dial mode. See D command. Q n – Result Codes Result codes are informational messages (such as Connect and Ring) sent from the modem and displayed on the asynchronous DTE terminal. Refer to T able B-1 [...]

  • Page 82

    COMSPHERE 3821 Plus Modem 4-6 January 1999 3821-A2-GB20-40 T able 4-1 (4 of 13) 3821 Plus A T Commands X n – Extended Result Codes, Dial T one Detect, and Busy T one Detect The X n command sets three configuration options simultaneously: Extended Dial Tone Busy T one Result Codes Detect Detect X0 Disable Disable Disable X1 Enable Disable Disable [...]

  • Page 83

    A T Commands and S-Registers 4-7 3821-A2-GB20-40 January 1999 T able 4-1 (5 of 13) 3821 Plus A T Commands ″ F – Clear Error Buffer Clears the buffer where information about the last critical error is stored. For service personnel use only . ″ F Clear error buffer . ″ H n – V .42bis Compression Enables or disables V .42bis data compression[...]

  • Page 84

    COMSPHERE 3821 Plus Modem 4-8 January 1999 3821-A2-GB20-40 T able 4-1 (6 of 13) 3821 Plus A T Commands &D n – DTR Action Data T erminal Ready (DTR) is a signal from the DTE to the modem indicating that the DTE is connected and ready for operation. & D0 Ignore. Modem ignores the true status of DTR and treats it as always ON. &D1 Off=Co[...]

  • Page 85

    A T Commands and S-Registers 4-9 3821-A2-GB20-40 January 1999 T able 4-1 (7 of 13) 3821 Plus A T Commands & I n – Dial T ransmit Level for Cellular Auto When Dial T ransmit Level T ype is set to Permissive, & I n sets Dial T ransmit Level to a value between –10 and – 32 dBm. & I 99 and & I 100 cause the level to be varied auto[...]

  • Page 86

    COMSPHERE 3821 Plus Modem 4-10 January 1999 3821-A2-GB20-40 T able 4-1 (8 of 13) 3821 Plus A T Commands &M n or &Q n – Async/Sync Mode and DTE Dialer T ype Sets the modem for either asynchronous or synchronous operation and selects the type of dialing method the modem uses. &M, &M0, &Q, &Q0 Modem operates in Asynchronous m[...]

  • Page 87

    A T Commands and S-Registers 4-1 1 3821-A2-GB20-40 January 1999 T able 4-1 (9 of 13) 3821 Plus A T Commands &S n – DSR Control Data Set Ready (DSR) is a signal from the modem to the DTE indicating the modem is connected and ready for operation. &S, &S0 Forced On. Forces DSR output ON constantly . This is usually used for leased-line a[...]

  • Page 88

    COMSPHERE 3821 Plus Modem 4-12 January 1999 3821-A2-GB20-40 T able 4-1 (10 of 13) 3821 Plus A T Commands &X n – T ransmit Clock Source Determines the source of timing for synchronous data transmitted from the DTE. &X, &X0 Internal. Modem provides transmit clock source for synchronous data (Pin 15). &X1 External. Modem derives exte[...]

  • Page 89

    A T Commands and S-Registers 4-13 3821-A2-GB20-40 January 1999 T able 4-1 (1 1 of 13) 3821 Plus A T Commands %C n – MNP5 Data Compression Determines if the modem uses MNP Class 5 data compression. It can be set independently of V .42bis data compression. Online changes do not take effect until a disconnect occurs. %C, %C0 Disable. %C1 Enable. +FC[...]

  • Page 90

    COMSPHERE 3821 Plus Modem 4-14 January 1999 3821-A2-GB20-40 T able 4-1 (12 of 13) 3821 Plus A T Commands K n – Buffer Control, Send Break Control, Break Forces Escape The K n command sets three configuration options simultaneously: Break Send Break Buffer Break Forces Control Control Escape K0 Discard Data Break First Enable K1 Discard Data B[...]

  • Page 91

    A T Commands and S-Registers 4-15 3821-A2-GB20-40 January 1999 T able 4-1 (13 of 13) 3821 Plus A T Commands  –          The Q n command controls two configuration options simultaneously: Flow Control Flow[...]

  • Page 92

    COMSPHERE 3821 Plus Modem 4-16 January 1999 3821-A2-GB20-40 S-Register List S-registers af fect the operating parameters of the 3821 Plus modem. These registers are applicable only when the DTE Dialer T ype configuration option is set for A T . (See &M n and &Q n commands.) S-registers can be displayed and/or modified when the modem is in C[...]

  • Page 93

    A T Commands and S-Registers 4-17 3821-A2-GB20-40 January 1999 T able 4-2 (2 of 10) 3821 Plus S-Registers S4 – Line Feed Character Determines ASCII value used as the line feed character . Enter a value from 0–127 for the line feed character . Factory setting is 10 (ASCII line feed). S5 – Backspace Character Determines ASCII value used as the [...]

  • Page 94

    COMSPHERE 3821 Plus Modem 4-18 January 1999 3821-A2-GB20-40 T able 4-2 (3 of 10) 3821 Plus S-Registers S14 – Asymmetric Rate Mode Register determines whether VF rates for transmitting and receiving are identical when using V .34 modulation. Enabling the function permits the two rates to be different. Register has the following values: 0 = Enable [...]

  • Page 95

    A T Commands and S-Registers 4-19 3821-A2-GB20-40 January 1999 T able 4-2 (4 of 10) 3821 Plus S-Registers S40 – Auto Make Busy Register determines whether the modem automatically goes into a Make Busy state in the following conditions: during a Local Analog Loop T est; during a Self T est not invoked by powering on the modem, and after a failed S[...]

  • Page 96

    COMSPHERE 3821 Plus Modem 4-20 January 1999 3821-A2-GB20-40 T able 4-2 (5 of 10) 3821 Plus S-Registers S44 – Leased Line Rate Determines the modem’s highest data rate and modulation scheme for operation on 2-wire leased lines in either Answer or Originate mode. Register has the following values (shown in bps): 1 = 14,400 (V .32bis) 2 = 12,000 ([...]

  • Page 97

    A T Commands and S-Registers 4-21 3821-A2-GB20-40 January 1999 T able 4-2 (6 of 10) 3821 Plus S-Registers S49 – T ransmit Buffer Disconnect Delay Determines the maximum amount of time the modem can continue to send data in its T ransmit Buffer to the remote modem after it is commanded by the DTE to disconnect. Register has the following values: 0[...]

  • Page 98

    COMSPHERE 3821 Plus Modem 4-22 January 1999 3821-A2-GB20-40 T able 4-2 (7 of 10) 3821 Plus S-Registers S63 – V .25bis Idle Character Identifies to the modem the type of idle fill used by the DTE while in V .25bis HDLC or V .25bis Bisync mode. Register has the following values: 0 = Mark 1 = Flag Factory setting is Mark. S64 – V .25bis New Line C[...]

  • Page 99

    A T Commands and S-Registers 4-23 3821-A2-GB20-40 January 1999 T able 4-2 (8 of 10) 3821 Plus S-Registers S76 – Autorate (Dial Line) Determines if the Autorate function is used on dial lines when connected in V .32bis, V .34 terbo , or V .34 mode. Autorate allows the modem to adjust line speed due to varying VF line quality . Register has the fol[...]

  • Page 100

    COMSPHERE 3821 Plus Modem 4-24 January 1999 3821-A2-GB20-40 T able 4-2 (9 of 10) 3821 Plus S-Registers S84 – A T Command Mode Determines how the modem responds to valid and invalid A T commands. The selections No ERROR and No Strap or ERROR permit installation into applications that are customized for a different modem. Register has the following[...]

  • Page 101

    A T Commands and S-Registers 4-25 3821-A2-GB20-40 January 1999 T able 4-2 (10 of 10) 3821 Plus S-Registers S91 – Cellular Enhancement V alid only if ETC is installed. Register determines whether parameters are set to improve performance over a cellular link. Should be enabled when the remote modem is using a cellular connection. Register has the [...]

  • Page 102

    COMSPHERE 3821 Plus Modem 4-26 January 1999 3821-A2-GB20-40 Recovering A T Commands Certain dialing methods, such as V .25bis and synchronous operation, disable the use of A T commands and place the modem into a state known as Dumb mode. The 3821 Plus is capable of normal operation when in Dumb mode. Moreover , the SDCP normally can be used to load[...]

  • Page 103

    A T Commands and S-Registers 4-27 3821-A2-GB20-40 January 1999 Initialization Strings An initialization string contains several A T commands that are entered at once to program the modem for a specific application. The following initialization strings identify essential A T commands that directly impact modem operation for a particular application.[...]

  • Page 104

    COMSPHERE 3821 Plus Modem 4-28 January 1999 3821-A2-GB20-40 This page intentionally left blank.[...]

  • Page 105

    5-1 3821-A2-GB20-40 January 1999 Fax Operation Overview 5-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Fax Operation 5-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [...]

  • Page 106

    COMSPHERE 3821 Plus Modem 5-2 January 1999 3821-A2-GB20-40 This page intentionally left blank.[...]

  • Page 107

    6-1 3821-A2-GB20-40 January 1999 Remote Access Overview 6-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Remote Access 6-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [...]

  • Page 108

    COMSPHERE 3821 Plus Modem 6-2 January 1999 3821-A2-GB20-40 NOTE If a connection is not established between a local COMSPHERE modem and a remote 3821 Plus modem, the LCD displays Remote Mode Fail – No Circuit . Press any key to return to the T op Level menu, and dial again. If the remote modem accepts the password and the entry is successful, the [...]

  • Page 109

    7-1 3821-A2-GB20-40 January 1999 Security Overview 7-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Password T ypes 7-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .[...]

  • Page 110

    COMSPHERE 3821 Plus Modem 7-2 January 1999 3821-A2-GB20-40 VF Passwords VF passwords consist of DTMF tones and are entered by the originating caller using the A T Dial (D) command, or the keypad of an attached telephone. They must consist of eight decimal digits, 0 through 9, and are terminated with the # symbol. For example, if 1 1223344 is a vali[...]

  • Page 111

    Security 7-3 3821-A2-GB20-40 January 1999 Callback Security Callback Security causes the responding modem to disconnect and call back to the phone number provided by the user at the originating modem. The user enters the number , when prompted by the remote modem, as a Directory location 1–10 preceded by the # sign, or as a complete telephone num[...]

  • Page 112

    COMSPHERE 3821 Plus Modem 7-4 January 1999 3821-A2-GB20-40 EditPassWdT able The Password T able 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 n[...]

  • Page 113

    Security 7-5 3821-A2-GB20-40 January 1999 T able 7-1 (2 of 2) Edit Password T able Group Options Edit PsWd xxxx Nxt  yyyyyyyy or zzzzzz Edit Password. Allows the password associated with this index to be changed. NOTE: This security option does not appear if the Password T ype option is set for Cleared. xxxx – Indicates the current index locat[...]

  • Page 114

    COMSPHERE 3821 Plus Modem 7-6 January 1999 3821-A2-GB20-40 Set Answer Sec Set Answer Security determines if dial access security is enabled or disabled. This method of inbound security is configured in the answering modem. Although this also appears under the Security Configuration Option group, it can only be changed from the Set Answer Sec LCD di[...]

  • Page 115

    Security 7-7 3821-A2-GB20-40 January 1999 Set Orig Secur Set Originate Security controls whether or not the modem can originate a call using A T commands when the dial access security feature is installed. This method of outbound security only applies to modems originating a call. T o access Set_Orig_Secur from Set Access Ctrl, press the key until [...]

  • Page 116

    COMSPHERE 3821 Plus Modem 7-8 January 1999 3821-A2-GB20-40 Set Admin PsWd Set Administration Password is used to change the Administration Password value. NOTE If this value is forgotten, then the only way to access any of the security functions is by selecting Reset Security . This restores the password to a known value*, but erases the contents o[...]

  • Page 117

    Security 7-9 3821-A2-GB20-40 January 1999 Security Configuration Options The Security Configuration Options group under the Configure branch allows you to view and set dial access security parameters. T able 7-5 shows each Security configuration option as it appears on the LCD. The factory default value is shown after the colon (:) on the first lin[...]

  • Page 118

    COMSPHERE 3821 Plus Modem 7-10 January 1999 3821-A2-GB20-40 T able 7-5 (2 of 3) Security Configuration Options DTE_PW_T ermChar: 013 Nxt  013 DTE Password T ermination Character . Allows you to change the ASCII character used to indicate the end of a password or User ID entered by an originating user . This character can be set to any ASCII valu[...]

  • Page 119

    Security 7-1 1 3821-A2-GB20-40 January 1999 T able 7-5 (3 of 3) Security Configuration Options Originate_Secur: No_OrigSec Nxt No_OrigSec Ena_Orig_Sec Originate Security Mode. This configuration option is read-only and cannot be changed from the Configure branch; it can be changed only with an A T command. This configuration option enables or disab[...]

  • Page 120

    COMSPHERE 3821 Plus Modem 7-12 January 1999 3821-A2-GB20-40 This page intentionally left blank.[...]

  • Page 121

    A-1 3821-A2-GB20-40 January 1999 SDCP Menu T ree Overview A-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Overview The following pages contain graphic representations of the general menu structure of the SDCP displays. The model, installed featur[...]

  • Page 122

    COMSPHERE 3821 Plus Modem A-2 January 1999 3821-A2-GB20-40 Call_Setup Status T est (Modem Status) Dial Disconnect Answer Change_Directory Director y Locations 1 – 10 Abort Self Loc_Analog_Loop Rem_Digital_Loop Loc_Digital_Loop Pattern DTE_Interface Async/Sync Mode Async DTE Rate Asyn #Data Bits Asyn P arity Bit Asyn #Stop Bits DTR Action DSR Cont[...]

  • Page 123

    SDCP Menu T ree A-3 3821-A2-GB20-40 January 1999 Configure Ld EditArea frm: Edit Sav e Choose Function Active (Sa ved) Customer1 Customer2 V42/MNP/Buffer Err Contrl Mode V42bis Compress MNP5 Compress EC Negotiat Bfr EC F allbck Char Flw Cntl of DTE Flw Cntl of Mdm XON/XOFF Psthru Mdm/Mdm FlowCtl Break Buffr Ctl Send Break Cntl Tx Buff Disc Dela y R[...]

  • Page 124

    COMSPHERE 3821 Plus Modem A-4 January 1999 3821-A2-GB20-40 Control Remote Secondary Prim (data blckd) ( ExitRem appears instead of Remote when using Remote Mode) Does not appear in Remote Mode. (Rem_Digital_Loop, Loc_Digital_Loop, and Pattern appear if the secondary channel is used.) Security Set_Access_Ctrl (Admin Password?) Reset_Security EditPas[...]

  • Page 125

    B-1 3821-A2-GB20-40 January 1999 Result Codes Overview B-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Overview T able B-1 lists all the result codes 3821 Plus modems may send to the DTE. Result codes can be numeric or verbal, terse or extended. [...]

  • Page 126

    COMSPHERE 3821 Plus Modem B-2 January 1999 3821-A2-GB20-40 T able B-1 (2 of 3) Result Codes Numbers (1) Description Word Numbers (2) 15 14 CONNECT 19200** Connection at 19,200 bps 16 15 CONNECT 7200* Connection at 7200 bps 17 17 CONNECT 16800* Connection at 16,800 bps 19 1 CONNECT 300* Connection at 300 bps 20 10 CONNECT 2400/ EC*** Connection at 2[...]

  • Page 127

    Result Codes B-3 3821-A2-GB20-40 January 1999 T able B-1 (3 of 3) Result Codes Numbers (1) Description Word Numbers (2) 43 43 CONNECT 21600/ EC*** Connection at 21,600 bps with error control 44 44 CONNECT 24000/ EC*** Connection at 24,000 bps with error control 45 45 CONNECT 26400/ EC*** Connection at 26,400 bps with error control 46 46 CONNECT 288[...]

  • Page 128

    COMSPHERE 3821 Plus Modem B-4 January 1999 3821-A2-GB20-40 This page intentionally left blank.[...]

  • Page 129

    C-1 3821-A2-GB20-40 January 1999 T roubleshooting Overview C-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Automatic Firmware Download C-5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .[...]

  • Page 130

    COMSPHERE 3821 Plus Modem C-2 January 1999 3821-A2-GB20-40 T able C-2 Online Operation Symptom Action Data scrambled or unreadable V erify that the character format (data bits, parity , and stop bits) is set to the same value in both modems. Missing data during a transfer V erify that you are using the same method of flow control for both the modem[...]

  • Page 131

    T roubleshooting C-3 3821-A2-GB20-40 January 1999 T able C-5 (1 of 2) Modem – VF Connection Symptom Action Modem does not receive a dial tone Check the VF line connection. V erify dial tone at the source. Modem does not go off-hook and answer an incoming call V erify that the Auto-Answer Ring Count configuration option (S-register 0) is set to a [...]

  • Page 132

    COMSPHERE 3821 Plus Modem C-4 January 1999 3821-A2-GB20-40 T able C-5 (2 of 2) Modem – VF Connection Symptom Action Intermittent disconnects, high error rates, or excessive retransmissions Use the A T&T7 command to perform a remote digital loopback test with pattern test. Modem connects but sends ERROR result code to DTE Y our modem may be co[...]

  • Page 133

    T roubleshooting C-5 3821-A2-GB20-40 January 1999 Automatic Firmware Download New releases may be available for the 3821 Plus modem. The latest 3821 Plus firmware is available at no charge from the Automatic Firmware Download Center . Refer to page A in the front of this document for contact information. Informational messages are displayed on your[...]

  • Page 134

    COMSPHERE 3821 Plus Modem C-6 January 1999 3821-A2-GB20-40 This page intentionally left blank.[...]

  • Page 135

    D-1 3821-A2-GB20-40 January 1999 T echnical Specifications T able D-1 (1 of 2) Model 3821 Plus T echnical Specifications Specifications Description APPROV ALS Refer to the label on your modem or contact your sales representative. COMP A TIBILITY AND VF DA T A RA TES Dial-Line Modulations ITU-T V .34 (33,600, 31,200, 28,800, 26,400, 24,000, 21,600, [...]

  • Page 136

    COMSPHERE 3821 Plus Modem D-2 January 1999 3821-A2-GB20-40 T able D-1 (2 of 2) Model 3821 Plus T echnical Specifications Specifications Description ENVIRONMENT Operating T emperature Relative Humidity Shock and Vibration Storage T emperature 32 ° F (0 ° C) to 122 ° F (50 ° C) 5% to 90% (noncondensing) Withstands normal shipping –4 ° F (– 2[...]

  • Page 137

    E-1 3821-A2-GB20-40 January 1999 Pin Assignments EIA-232-E Pin Assignments E-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . JM8 to RJ1 1 Crossover Cable E-2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . NIM Cabl[...]

  • Page 138

    COMSPHERE 3821 Plus Modem E-2 January 1999 3821-A2-GB20-40 JM8 to RJ1 1 Crossover Cable For 2-wire leased-line connections to a JM8 network interface, an 8-position to 6-position crossover cable (see Figure E-1 ) must be used according to the following FCC requirements: ‘ ‘The RJ series of jacks should not be used for connecting data equipment [...]

  • Page 139

    Pin Assignments E-3 3821-A2-GB20-40 January 1999 NIM Cable Pin Assignments T able E-2 lists the pin assignments for the 50-pin cable connected to the NIM. T able E-2 NIM Cable Pin Assignments Carrier Slot Modem Tip Ring Pair Colors 1 or 9 A 26 1 White/Blue B 34 9 Red/Brown C 42 17 Y ellow/Orange 2 or 10 A 27 2 White/Orange B 35 10 Red/Slate C 43 18[...]

  • Page 140

    COMSPHERE 3821 Plus Modem E-4 January 1999 3821-A2-GB20-40 This page intentionally left blank.[...]

  • Page 141

    F-1 3821-A2-GB20-40 January 1999 ITU-T V .25bis Dialing Commands and Responses Overview F-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Call Request Commands F-2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [...]

  • Page 142

    COMSPHERE 3821 Plus Modem F-2 January 1999 3821-A2-GB20-40 Call Request Commands Call Request commands are issued from the DTE to the modem and are responsible for initiating any dial calls. Call Request commands include Call Request with Number Provided (CRN), Call Request with Stored Memory Address Provided (CRS). Call Request with Number Provide[...]

  • Page 143

    ITU-T V .25bis Dialing Commands and Responses F-3 3821-A2-GB20-40 January 1999 Call Connecting (CNX) The CNX response informs the DTE that the modem has connected to the remote modem. CNX is similar to the A T result code CONNECT . The CNX response format is CNX. Call Answer Commands Call Answer commands disable or enable the modem’ s AutoAnswer [...]

  • Page 144

    COMSPHERE 3821 Plus Modem F-4 January 1999 3821-A2-GB20-40 Command Response A Command Response indicates that the command entered was a valid or invalid entry . Command Response includes V alid (V AL) and Invalid (INV). V alid (V AL) The V AL response indicates that the modem has accepted the V .25bis command issued by the DTE. V AL is similar to t[...]

  • Page 145

    ITU-T V .25bis Dialing Commands and Responses F-5 3821-A2-GB20-40 January 1999 T able F-2 lists V .25bis response messages supported by the 3821 Plus modem. T able F-2 V .25bis Response Messages V .25bis Command Description A T Command/Result Code Equivalent CALL RESPONSE CFI Call Failure Indication BUSY , NO ANSWER, NO CARRIER, NO DIAL TONE, ERROR[...]

  • Page 146

    COMSPHERE 3821 Plus Modem F-6 January 1999 3821-A2-GB20-40 This page intentionally left blank.[...]

  • Page 147

    G-1 3821-A2-GB20-40 January 1999 Equipment List Equipment Order Number Part Number 3821 Plus Modem Card (three modems per card) 3821-B1-001 — NIM with Make Busy and Service Line Features 3000-F1-027 — NIM without Make Busy and Service Line Features 3000-F1-028 — DTE Interface Assembly (8-slot, 24-port) 3821-F1-001 — Optional Equipment: DTE [...]

  • Page 148

    COMSPHERE 3821 Plus Modem G-2 January 1999 3821-A2-GB20-40 This page intentionally left blank.[...]

  • Page 149

    H-1 3821-A2-GB20-40 January 1999 Country-Specific Configuration Options Configuration Options by Country Code H-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Configuration Options by Country Code T ables H-1 and H-2 show configuration options whose validity or default values vary according to co[...]

  • Page 150

    COMSPHERE 3821 Plus Modem H-2 January 1999 3821-A2-GB20-40 T able H-1 (1 of 5) Configuration Options by Country (A through M) Strap Description DCP Choice A T Command Australia Austria Belgium Cyprus Czechia Denmark Eire Finland France Germany Israel Italy Japan DTR Action (&D n ) Ignore &D0 F I F F F F F F F F F F F (&D n ) Stndrd_RS23[...]

  • Page 151

    Country-Specific Configuration Options H-3 3821-A2-GB20-40 January 1999 T able H-1 (2 of 5) Configuration Options by Country (A through M) Australia Japan Italy Israel Germany France Finland Eire Denmark Czechia Cyprus Belgium Austria A T Command DCP Choice Strap Description “,” Pause T ime (S8) 2 sec S8=2 F F F F F F F F F F F F F (S8) 4 sec t[...]

  • Page 152

    COMSPHERE 3821 Plus Modem H-4 January 1999 3821-A2-GB20-40 T able H-1 (3 of 5) Configuration Options by Country (A through M) Australia Japan Italy Israel Germany France Finland Eire Denmark Czechia Cyprus Belgium Austria A T Command DCP Choice Strap Description No Data Disc (T n ) — T2 V V V V V F V V V V V V V (T n ) — T3 V F V V V V V V [...]

  • Page 153

    Country-Specific Configuration Options H-5 3821-A2-GB20-40 January 1999 T able H-1 (4 of 5) Configuration Options by Country (A through M) Australia Japan Italy Israel Germany France Finland Eire Denmark Czechia Cyprus Belgium Austria A T Command DCP Choice Strap Description Dial TX Level (& I n &J n ) PERMISSV (–9) &J0 I I I I I I I [...]

  • Page 154

    COMSPHERE 3821 Plus Modem H-6 January 1999 3821-A2-GB20-40 T able H-1 (5 of 5) Configuration Options by Country (A through M) Australia Japan Italy Israel Germany France Finland Eire Denmark Czechia Cyprus Belgium Austria A T Command DCP Choice Strap Description Leased TX Level (S45) 0 dBm S45=0 I I I I I I I I I I I I I (S45) –1 dBm S45=1 V I V [...]

  • Page 155

    Country-Specific Configuration Options H-7 3821-A2-GB20-40 January 1999 T able H-2 (1 of 5) Configuration Options by Country (N through Z) Strap Description DCP Choice A T Command Netherlands New Zealand North America Norway Portugal Singapore South Africa Spain Sweden Switzerland Thailand T urkey United Kingdom DTR Action (&D n ) Ignore &D[...]

  • Page 156

    COMSPHERE 3821 Plus Modem H-8 January 1999 3821-A2-GB20-40 T able H-2 (2 of 5) Configuration Options by Country (N through Z) Netherlands United Kingdom T urkey Thailand Switzerland Sweden Spain South Africa Singapore Portugal Norway North America New Zealand A T Command DCP Choice Strap Description “,” Pause T ime (S8) 2 sec S8=2 F F F F F F F[...]

  • Page 157

    Country-Specific Configuration Options H-9 3821-A2-GB20-40 January 1999 T able H-2 (3 of 5) Configuration Options by Country (N through Z) Netherlands United Kingdom T urkey Thailand Switzerland Sweden Spain South Africa Singapore Portugal Norway North America New Zealand A T Command DCP Choice Strap Description No Data Disc (T n ) — T2 V V V V[...]

  • Page 158

    COMSPHERE 3821 Plus Modem H-10 January 1999 3821-A2-GB20-40 T able H-2 (4 of 5) Configuration Options by Country (N through Z) Netherlands United Kingdom T urkey Thailand Switzerland Sweden Spain South Africa Singapore Portugal Norway North America New Zealand A T Command DCP Choice Strap Description Dial TX Level (& I n &J n ) PERMISSV (?[...]

  • Page 159

    Country-Specific Configuration Options H-1 1 3821-A2-GB20-40 January 1999 T able H-2 (5 of 5) Configuration Options by Country (N through Z) Netherlands United Kingdom T urkey Thailand Switzerland Sweden Spain South Africa Singapore Portugal Norway North America New Zealand A T Command DCP Choice Strap Description Leased TX Level (S45) 0 dBm S45=0 [...]

  • Page 160

    COMSPHERE 3821 Plus Modem H-12 January 1999 3821-A2-GB20-40 This page intentionally left blank.[...]

  • Page 161

    Glossary-1 3821-A2-GB20-40 January 1999 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, this area is updated with the contents of Active (Saved). Active (Saved) A nonvolatile configuration area containing the most r[...]

  • Page 162

    COMSPHERE 3821 Plus Modem Glossary-2 January 1999 3821-A2-GB20-40 automatic answer A capability to respond to a call received over a dial line. automode T o change modulations or rates within a modulation when modems first connect. A modem may automode to a different modulation than what it is configured for due to the limitations of the remote mod[...]

  • Page 163

    Glossary Glossary-3 3821-A2-GB20-40 January 1999 configuration option Modem software that sets specific operating parameters for the modem. Sometimes referred to as straps. connector An outlet on equipment and cables that provides a connection. CSA Canadian Standards Association. CTS Clear to Send. A signal indicating that the modem is ready for th[...]

  • Page 164

    COMSPHERE 3821 Plus Modem Glossary-4 January 1999 3821-A2-GB20-40 directory location Nonvolatile memory that stores up to ten telephone numbers. Each directory location can have up to 40 characters entered. DOC Canadian Department of Communication. download A process that transfers modem firmware from a locally attached PC to a modem or allows the [...]

  • Page 165

    Glossary Glossary-5 3821-A2-GB20-40 January 1999 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 ISO. host A computer attached to a network that shares its information and devices with the rest of the network. Hz[...]

  • Page 166

    COMSPHERE 3821 Plus Modem Glossary-6 January 1999 3821-A2-GB20-40 Originate mode The state of a modem ready to transmit a call. In a dial network, it is the modem that makes the call. In a leased-line network, it is one of two sides of the network that is selected to be the originating modem. parity A way of checking data accuracy by counting the n[...]

  • Page 167

    Glossary Glossary-7 3821-A2-GB20-40 January 1999 S-registers Registers that contain information af fecting modem operation. S-register commands must be preceded by the A T prefix. Sync Dial A factory preset configuration area containing configuration options most often used in synchronous dial networks. synchr onous transmission Data transmission t[...]

  • Page 168

    COMSPHERE 3821 Plus Modem Glossary-8 January 1999 3821-A2-GB20-40 V .42bis ITU-T standard for data compression. V .54 ITU-T standard for local and remote diagnostic loopback tests. VF V oice Frequency . The part of the audio frequency range used to transmit voice sound (usually 300 Hz to 3400 Hz). This band is used by the modem for its modulated si[...]

  • Page 169

    Index-1 3821-A2-GB20-40 January 1999 Index Symbols ! (hook flash), 4-4 “,” dial modifier (Pause), 4-3 “,” Pause T ime (S8), 4-17 “;” (return to command mode), 4-4 @ (quiet answer), 4-4 Numbers 2-wire leased line connection, 2-2, E-2 3821Plus modem A T commands, 4-2 card installation, 2-4 description, 1-1 features, 1-1 operating modes, 4[...]

  • Page 170

    COMSPHERE 3821 Plus Modem Index-2 January 1999 3821-A2-GB20-40 A T commands, continued E (Command Character Echo), 3-26, 4-4 H (Hook Switch Control), 4-4 I (Identification), 4-4 O (Online Mode), 4-4 Q (Result Codes), 3-27, 4-5 recovering use of, 4-26 Sn? (Display S-register), 4-5 Sn=r (Change S-register), 4-5 using to change factory presets, 2-6 V [...]

  • Page 171

    Index Index-3 3821-A2-GB20-40 January 1999 default configuration options, 2-5 setting with A T commands, 2-6 setting with DCP , 2-5 Dial, 3-9 Dial (A TD), 4-3 Dial Command modifiers P (Pulse dial), 3-30 T (T one dial), 3-30 dial command modifiers, 4-3 Dial Line Rate, 3-34 Dial Line Rate (S41), 4-19 Dial Stored Number (A TDS), 4-4 Dial T one Detect,[...]

  • Page 172

    COMSPHERE 3821 Plus Modem Index-4 January 1999 3821-A2-GB20-40 G gang box, RJ11, 2-2 Get_User_ID, 7-10 H hang up (A TH), 4-4 Hidden Choice Indicators, 1-4 hook flash, 4-4 Hook Switch Control (A TH), 4-4 I Identity , 3-12 Identity (A TI), 4-4 initialization strings, 4-27 DA T AKIT , 4-27 synchronous leased-line applications, 4-27 V .25bis applicatio[...]

  • Page 173

    Index Index-5 3821-A2-GB20-40 January 1999 P P (Pulse dial), 4-3 Parity Bit, 3-20 part numbers, G-1 password Administration, 7-1, 7-8 number of DTE password tries, 7-9 Originate Access, 7-2 Remote Access, 4-21 remote access, 3-45 T able, 7-4 types, 7-1 Password T able, 7-4 Pattern (T est branch), 3-14 Pause T ime (for “,” dial modifier), 3-31 p[...]

  • Page 174

    COMSPHERE 3821 Plus Modem Index-6 January 1999 3821-A2-GB20-40 S-registers, continued S90 (DTE Rate = VF Rate), 3-24, 4-24 S91 (Cellular Enhancement), 3-43, 4-25 S93 (RJ1 1 Cellular Adapt), 3-46, 4-25 SDCP (Shared Diagnostic Control Panel) Hidden Choice Indicators, 1-4 keypad, 1-4 operation, 1-4 using to change factory presets, 2-5 secondary channe[...]

  • Page 175

    00282600 – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – ?[...]