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General DataComm SpectraComm V.34 Installation & Operation Manual

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6SHFWUD&RPP
V.34 Dual Modem
Installation & Operation Manual
060R122-000
Issue 15
May 2012
General DataComm
The Best Connections in the Business

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Summary of Contents for General DataComm SpectraComm V.34

  • Page 1 6SHFWUD&RPP V.34 Dual Modem Installation & Operation Manual 060R122-000 Issue 15 May 2012 General DataComm The Best Connections in the Business...
  • Page 2 General DataComm, Inc. The information in this document is subject to change without notice. General DataComm assumes no responsibility for any damages arising from the use of this document, including but not limited to, lost revenue, lost data, claims by third parties, or other damages.

  • Page 3: Table Of Contents

    Table of Contents Preface Safety Information ........................vi Compliance ..........................vii Support Services and Training....................xi Corporate Client Services....................xi Factory Direct Support & Repair ..................xi Contact Information ......................xi Chapter 1: System Description Diagnostic Testing......................1-3 Dual V.34 Modem Software.....................1-3 Shelf / Enclosure Options....................1-4...
  • Page 4 Table of Contents Secure Access Modem Authentication Option .............. 3-16 Message Flow ........................ 3-20 Command Mode Overview ....................3-21 AT Commands ....................... 3-22 Configuration Profiles....................3-23 Remote Configuration Using the AT Commands............3-23 Remote Configuration Using an MMS Controller............3-25 Data Mode Overview......................
  • Page 5 Table of Contents AT Command Details ......................4-22 &Fn Fixed Configuration Profiles..................4-23 \Vn Connect Messages ....................4-27 Chapter 5: V.25 bis Command Set Operation V.25 bis Protocol Overview....................5-1 V.25 bis Operating Modes....................5-2 Commanding the Modem....................... 5-3 V.25 bis Configuration Commands..................5-4 V.25 bis Communication Commands................5-7 ITU-T V.25 bis Command Procedures...
  • Page 6 Table of Contents SpectraComm Dual V.34 Modem 060R122-000 Installation and Operation Issue 15...

  • Page 7: Preface

    However, as General DataComm improves the reliability, function, and design of their products, it is possible that information may not be current. Contact General DataComm if you require updated information for this or other General DataComm products.

  • Page 8: Safety Information

    Preface Safety Information Safety Information This manual should be read in its entirety and all procedures completely understood before installing or operating the unit, including all notes, cautions and warnings (examples below). The CAUTION, WARNING, and DANGER statements that appear throughout this manual are intended to provide critical information for the safety of both the service engineer and operator.

  • Page 9: Compliance

    If trouble is experienced with the SpectraComm Dual V.34, for repair or warranty information, please contact General DataComm, Inc. at (203) 729-0271. If the equipment is causing harm to the telephone network, the telephone company may request that you disconnect the equipment from the network until the problem is resolved.
  • Page 10 Preface Compliance The Telephone Consumer Protection Act of 1991 makes it unlawful for any person to use a computer or other electronic device, including FAX Machines, to send any message unless such message clearly contains the following information: • Date and time the message was sent. •...
  • Page 11 Preface Compliance Avis D’industrie Canada L’étiquette d’Industrie Canada identifie le matériel homologué. Cette étiquette certifie que le matériel est conforme aux normes de protection, d’exploitation et de sécurité des réseaux de télécommunications, comme le prescrivent les documents concernant les exigences techniques relatives au matériel terminal.
  • Page 12 Telefonleitungen. Achtung: Es gibt keine durch den Benutzer zu wartende Teile im Gerät. Wartung darf nur durch qualifiziertes Personal erfolgen. EC Declaration of Conformity General DataComm Inc. 6 Rubber Avenue Naugatuck, CT 06770, U.S.A. Declare under our sole responsibility that the SpectraComm Dual V.34 modem is in conformity...

  • Page 13: Support Services And Training

    Support Services and Training Support Services and Training General DataComm offers two comprehensive customer support organizations dedicated to pre-and post-sale support services and training for GDC products. Corporate Client Services and Factory- Direct Support & Repair assist customers throughout the world in the installation, management, maintenance and repair of GDC equipment.
  • Page 14 Preface Support Services and Training SpectraComm Dual V.34 Modem 060R122-000 Installation and Operation Issue 15...

  • Page 15: Chapter 1: System Description

    System Description Chapter 1: Overview The SpectraComm Dual V.34 Modem is a full universal (on-line compatible with all modems that comply with V.34), full-duplex, multi-speed modem, providing 33.6 kbps to 300 bps operation over the telephone (VF) line, and is connected to a switched or private 2-wire line.
  • Page 16 System Description Management Features The Dual V.34 modem supports Simple Network Management Protocol (SNMP) Management Information Base (MIB) files for modem control by an SNMP network controller. You must have a SpectraComm Manager (SCM) card to access the MIBs. The modem can also be managed locally via the DTE interface using the AT command set, the ITU- T V.25 bis command set, or remotely through an off-site V.34 modem and DTE.

  • Page 17: Diagnostic Testing

    System Description Diagnostic Testing To help you restore service quickly in the event of problems, the Dual V. 34 provides diagnostics for accurate detection of system faults, such as: Local Test, Local Loop Test Self-Test, Digital Loopback, Remote Digital Loopback, Remote Digital Loopback Self-Test, and End-to-End Self- Test.

  • Page 18: Shelf / Enclosure Options

    System Description Shelf / Enclosure Options Figure 1-1 shows shelf and enclosure configurations for any model of the Dual V.34 modem. Up to 31 modems can be accommodated in a shelf/enclosure configuration, alone or with other types of network elements. Refer to Table 1-2 for shelf / enclosure descriptions and part numbers.

  • Page 19: Security Solutions

    System Description Security Solutions GDC modems provide several built-in and optional security features, described briefly below, which can function alone or in various combinations (Table 3-3). Optional security features are installed at the factory at the time of purchase, or can be factory upgraded in the field. GDC continually enhances the security features of its V.34 modems.
  • Page 20 System Description SAM Authentication Option When factory-optioned, the SC Dual V.34 modem can function as a Secure Access Modem (SAM) in a Secure Access Controller (SAC) system. In this system, a SAC Administration Server, SAC Access database, an Authentication server, Client desktop software, and the Secure Access modem can authenticate remote users attempting to access protected network equipment, such as switches, routers, multiplexers, etc.
  • Page 21 System Description Country Codes The following table lists country codes that are suppored in the modem. Country code certifications are subject to change without notice. For the current product status, refer to the GDC website at http://www.gdc.com/products/prod_homo.shtml • Country codes listed as 999 (default) indicate no dialing parameters. •...

  • Page 22: Equipment List

    System Description Equipment List Equipment List Table 1-2 lists the part numbers for standard and optional equipment for the Dual V.34 modem. • The Dual V.34 modem can be ordered with security options (RADIUS, AES Encryption, or SAM Authentication), or can be optioned by the factory at a later time. •...
  • Page 23 System Description Equipment List Table 1-2 Standard and Optional Equipment List for Dual V.34 (Continued) SpectraComm MS-2, Model 1 (100/120 VAC); two 8-slot, dual RJ45 Zone 1 010M054-001 5000 Shelves connector panels MS-2, Model 2 (-48 VDC); two 8-slot, dual RJ45 Zone 1 connector 010M055-001 panels MS-2, Model 2 (-48 VDC) with term block kit;...

  • Page 24: Technical Specifications

    System Description Technical Specifications Technical Specifications The following tables describes the physical, operational, and environmental specifications for the SpectraComm Dual V.34 modem. Conforming to these specifications ensures maximum system performance and reduces the chances of mechanical breakdown and personnel hazard. Table 1-3 Technical Specifications Specification...
  • Page 25 System Description Technical Specifications Table 1-3 Technical Specifications Specification Description Detail Answer Tone ITU-T V.32 bis , V.32, V.22 bis , V.22 2100 Hz ±3 Hz and V.21 modes Bell 212A and 103 modes 2225 Hz ±3 H ITU-T V.34 As specified by ITU-T Transmit Carrier ITU-T V.34 As specified by ITU-T...
  • Page 26 System Description Technical Specifications Table 1-3 Technical Specifications Specification Description Detail Pulse Dial Ratio USA Make/Break: 39/61% International Per Country requirements Ring Cadence On 2 seconds; Off 4 seconds International Per Country requirements DC Loop 20-80 milliamps Current International Per Country requirements Call Progress BUSY (Refer to ITU-T V.42 options for CONNECT delay)

  • Page 27: Chapter 2: Installation

    Installation Chapter 2: Installation Overview The SC Dual V.34 modem is intended for installation in a SpectraComm/UAS shelf or enclosure. SpectraComm shelves come with various configurations for private line and switched network connections. For additional information on a specific shelf or enclosure, refer to its accompanying documentation.

  • Page 28: Setting Option Jumpers

    Installation Setting Option Jumpers The Dual V.34 card has one jumper for each of its two modems, used to select between switched network mode (factory default), and private line mode. Jumper X3 makes the selection for Modem A; Jumper X4 makes the selection for Modem B. •...
  • Page 29 Installation OPTION JUMPER LOCATION SC DUAL V.34 MODEM MODEM "A" MODEM "B" (See details below) SHELF BACKPLANE TYPES MODULAR BACKPLANE UNIVERSAL MASS TERM NON-UNIVERSAL MASS TERM BACKPLANE BACKPLANE SETTING X3, X4 OPTIONS With MODULAR backplanes or With NON-UNIVERSAL UNIVERSAL MASS TERM backplanes: MASS TERM backplanes: 010M054-001 010M073-001...

  • Page 30: Installing The Dual V.34 Modem

    Installation Installing the Dual V.34 Modem The Dual V.34 card may be installed in any slot of its housing. To install the modem: 1. Check that the X3 and X4 jumpers are properly set for each modem for switched network or 2-wire private line operation.
  • Page 31 Installation CONNECTOR DETAILS MODULAR CONNECTORS MODEM A MODEM B MODEM B MODEM A (SN or PL) (SN or PL) SN or PL SN or PL SC 5000 SHELF PIN 1 PIN 1 SHELF ADDRESS PIN 1 PIN 8 JUMPER NOTE: Option jumpers set the modem channels for SN or PL communications ( see Fig.
  • Page 32 Installation Business Equipment (DTE) Connectors and Pinouts Table 2-2 TIA/EIA-232-F (ITU-T V.24/V.28/ISO 2110) Interface Pinouts 232-F V.34 Name Direction Function To DCE Transmitted Data From DCE Received Data To DCE Request to Send From DCE Clear to Send From DCE Data Set Ready SIG GND Signal Ground...

  • Page 33: Special Considerations For High Data Rates

    Installation Special Considerations for High Data Rates Because of the high data rates possible with the Dual V.34 modem, the type and length of the DTE cable are important factors in ensuring data integrity. The modem's higher data rates require the use of shielded DTE cables.

  • Page 34: Verifying Your Connections

    Installation Verifying Your Connections Your modem should now be connected. You can verify all your connections by following the steps listed below. 1. To verify that the power supply is connected properly, see if the ON LED is on. If not, then either the power supply is not connected properly, or the modem is not functioning.

  • Page 35: Chapter 3: Operation

    Operation Chapter 3: Operation Overview This chapter describes the modem’s security features and modes of operation: command mode and data mode. When in data mode, the modem transmits and receives data over a telephone line to a modem and a DTE at another site. When in command mode, the modem can accept AT commands which determine how it will perform those essential functions.

  • Page 36: Dual V.34 Front Panel

    Operation Dual V.34 Front Panel Dual V.34 Front Panel Table 3-1 Dual V.34 Front Panel Controls and Indicators Front Panel LED/Switch Power ON. Green - power is applied to the modem. Send Data. Green - When ON indicates a SPACE condition in the transmitted data. OFF indicates a MARK condition.

  • Page 37: Call Control Basics

    Operation Call Control Basics Call Control Basics Call control involves call initiation, completing a connection, call answering, and disconnecting a call. The following paragraphs describe the procedures required for each type of call control. The modem can be commanded to initiate a call in any of three ways: •...

  • Page 38: Call Initiation Examples

    Operation Call Control Basics Call Initiation Examples Refer to the description of the Dial (D n) command provided in Chapter 4 for functions of all dial modifier characters (such as P, W, T, and S as used in the following examples). Manual Call Initiation Example: To initiate a call manually, type: ATDP9W8095551234[Enter] where:...

  • Page 39: Completing A Connection

    Operation Call Control Basics Completing a Connection Once you have issued a dial command, the Front Panel Off Hook (OH) LED should be on. If the connection is successful, a CONNECT result code appears, indicating you are connected to the remote end.
  • Page 40 Operation Call Control Basics Disconnecting a Call There are several ways to disconnect a call. The chart below lists and describes each method. H command Disconnects the With the modem in asynchronous mode, type the ESCAPE modem from the character string (default is +++). When the modem returns VF line.

  • Page 41: Security Overview

    Manager (SCM) card with RADIUS enabled, and a customer-supplied RADIUS server are also required. Refer to the SCM Operation Manual, Appendix B, to determine if your system is RADIUS ready. Note AES Encryption requires two factory-optioned SpectraComm V.34 modems. SAM Authentication requires one factory-optioned SpectraComm V.34 modem and an authentication server. Special Considerations •...
  • Page 42 Operation Security Overview Cell Passwords The %Pn command allows you to configure or disable cell passwords in the modem. • With SteadFast Security, only one identical cell password is stored in memory cell 0 of both the answering and the originating modem. •...
  • Page 43 Operation Security Overview Table 3-3 SpectraComm Dual V.34 Security Selection and Configuration Security Option Originate Modem Answer Modem Passwords Disabled phone number ATDT[ SteadFast Security Pass-thru Only SteadFast password SteadFast password %P0=[ %P0=[ phone number ATDT[ Mandatory SteadFast Callback SteadFast password SteadFast password %P0=[ %P0=[...
  • Page 44 Operation Security Overview Table 3-3 SpectraComm Dual V.34 Security Selection and Configuration Security Option Originate Modem Answer Modem AES Encryption Encryption only Encryption Key Encryption Key %X1 = [ %X1=[ Security Encryption and Encryption Key Encryption Key %X1 = [ %X1=[ SteadFast SteadFast password...

  • Page 45: Steadfast Password Security

    Operation Security Overview SteadFast Password Security For all types of SteadFast Security, both modems must be GDC modems optioned for SteadFast Security (%S1). The same SteadFast password (up to 10 characters) must be stored in both modems in memory cell 0 (%P0=xxx, where xxx is the cell password). The remote user does not have to enter additional cell passwords.

  • Page 46: Online Password Security

    Operation Security Overview Online Password Security The modem provides ten memory cells for storing cell passwords for Online Security. The command for storing an online cell password is %Pn=xxx, where n is the password cell number (0 through 9) and xxx is the password. The cell password can be any string of up to ten characters. Do not use commas in the cell password.
  • Page 47 Operation Security Overview Online Security Callback Sequence The following Online security sequences occur when a remote user uses a valid cell password to place a call to a modem that will use either a stored callback number or a roving callback number. If an invalid cell password is entered, the answering modem will directly terminate the call.

  • Page 48: Radius Security (Remote Authentication Dial-In User Service)

    Operation Security Overview RADIUS Security (Remote Authentication Dial-In User Service) When optioned at the factory, the modem can support RADIUS (Remote Authentication Dial-In User Service). RADIUS is an optional software feature for the SpectraComm Manager Card that allows a modem optioned for RADIUS to open a client service session for RADIUS security. The modem can be optioned for RADIUS Security at the time of sale, or at a later time through a factory upgrade.

  • Page 49: Aes Encryption Security

    Operation Security Overview AES Encryption Security A modem purchased from the factory with AES Encryption is already capable of encryption. Modems in the field can be returned to the factory for an encryption upgrade. For modems already installed in a customer’s network, contact your service representative to arrange for an upgrade. A modem is capable of AES Encryption when the following conditions are met: •...

  • Page 50: Secure Access Modem Authentication Option

    Operation Security Overview Secure Access Modem Authentication Option When factory-optioned as a Secure Access Modem, the SC Dual V.34 modem can function as a Secure Access Modem (SAM) in a Secure Access Controller (SAC) system. The Secure Access Controller (SAC) system consists of an SAC Administration Server, SAC Database, a SAC Authentication Server, Client desktop software, and a Secure Access Modem.
  • Page 51 Operation Security Overview 4. Configure the authentication server phone numbers) by typing: AT&Z9=nnnnnnnnnn (for the Primary Server) AT&Z8=nnnnnnnnnn (for the Backup/Secondary Server) Note AT&Z9 AT&Z8 commands save phone numbers in the modem for dialing the primary and secondary authentication server in the modem's phone cell 9 and phone cell 8, respectively. If a secondary server is not required, leave phone cell 8 empty.
  • Page 52 Operation Security Overview SAM Authentication Sequence The SAM-protected network consists of the primary authentication server and its modem bank (usually at the NOC), and the remote SAM modem and its attached communication devices. For server redundancy, a secondary authentication server and its modem bank can be deployed at a separate location.
  • Page 53 Operation Security Overview Special SAM Considerations • If the SAM modem fails to make a connection with the authentication server, it will attempt another call after the Redial Delay period. • If the SAM modem connects successfully with the server modem but fails to exchange proper messages with the authentication server within 30 seconds after call is connected, the modem will disconnect the call.

  • Page 54: Message Flow

    Operation Security Overview Message Flow The Secure Access Modem is connected to a PSTN by voice-band modems. The Authentication Server is connected to the PSTN via a modem bank, allowing access to the server by multiple users. A secondary Authentication Server minimizes delay and avoids downtime. The message flow between components in a Secure Access Controller system is detailed below.

  • Page 55: Command Mode Overview

    Operation Command Mode Overview Command Mode Overview When in command mode, the modem can accept AT commands which determine how it will perform those essential functions. Command Mode Basics • To use AT commands requires a computer or terminal at the DTE port with an EIA/TIA-232- F serial port to enable communication between the DTE and the modem.

  • Page 56: At Commands

    Operation Command Mode Overview AT Commands In command mode the modem looks at everything you type on the DTE keyboard. When the modem detects a valid command, it will be executed. AT commands can cause the modem to answer a call, hang up or dial, change an S-Register value, or perform other command functions, as described later in this manual.

  • Page 57: Configuration Profiles

    Operation Command Mode Overview Configuration Profiles A configuration profile consists of the set of AT commands the modem is given to establish its operating characteristics. The modem can store four factory-provided fixed profiles and four user defined profiles. By recalling and loading a stored profile you can completely reconfigure the modem without having to change individual options.
  • Page 58 Operation Command Mode Overview Remote Configuration Procedure (AT Commands) 1. To initiate a Remote Configuration session, enter *W1 at the local modem. In switched network mode, you must then place the call to the remote modem. 2. Upon connection, the local modem displays one of the following: OK REMOTE CONFIG SESSION VIEW (when write access is disabled via *R1 command.) OK REMOTE CONFIG SESSION EDIT (when write access is enabled via *R0 command) 3.

  • Page 59: Remote Configuration Using An Mms Controller

    Operation Command Mode Overview Remote Configuration Using an MMS Controller Remote Configuration over a link between two modems can be performed with SNMP commands from an MMS controller. Remote Configuration Procedure (MMS Controller) 1. At the local site, select the MIB variable Remote Configuration, and enable MMS enumeration.

  • Page 60: Data Mode Overview

    Operation Data Mode Overview Data Mode Overview The modem is in data mode while it has a telephone line connection to another modem or is in the process of establishing a connection. In Data Mode the modem transmits all the data it receives from the DTE over the phone line.

  • Page 61: Asynchronous Operation

    Operation Asynchronous Operation Asynchronous Operation When you select Operating Mode 0 (&M0) the modem will operate asynchronously when the modem is on-line (data mode - connected to the telephone line) and off-line (Command Mode - disconnected from the telephone line). The modem can employ error correction (reliable) protocols to ensure error-free delivery of asynchronous data sent between computers.
  • Page 62 Operation Asynchronous Operation MNP Reliable Mode Error Correction (Levels 2 - 4) In MNP Reliable Mode (\N2), the modem will only connect with another modem that has an error correction system capable of establishing an MNP reliable link. When the connection is made, the modem immediately attempts to establish an MNP reliable link.
  • Page 63 Operation Asynchronous Operation V.42 bis Data Compression V.42 bis data compression is only possible when the modem has established a V.42 (LAPM) error correcting connection. V.42 bis compression generally gives improved throughput results versus MNP 5 compression, particularly when transferring previously compressed files. V.42 bis only compresses files where it can improve performance.

  • Page 64: Non-Error Correcting Modes

    Operation Asynchronous Operation Non-Error Correcting Modes The modem also employs the following non-error correcting modes, described below. Like the MNP and V.42 protocols, these modes are configured using the \N command. • wire mode • direct V.14 asynchronous mode • V.13 mode Wire Mode Wire mode (\N0) is used to communicate with standard, non-error correcting modems.

  • Page 65: Flow Control

    Operation Asynchronous Operation Flow Control Flow control and buffering compensate for the rate differences of error correction and data compression. In combination with internal data buffering, flow control permits portions of a data link to operate at different speeds. For example, the rate of transfer between the local DTE and modem can be greater than the VF line speed negotiated between the local and remote modems, while the modem-to-DTE transfer rate at the remote site can differ from both.

  • Page 66: Synchronous Operation

    Operation Synchronous Operation Synchronous Operation Synchronous Operating Modes The &Mn (Operating Mode) command selects between asynchronous and synchronous Data Mode operation. Its synchronous mode setting, &M1, supports asynchronous dialing with synchronous transmission. The \Mn command also selects the protocol that the modem will follow while it is in synchronous Data Mode.

  • Page 67: V.13 Synchronous Mode

    Operation Synchronous Operation V.13 Synchronous Mode The \M1 command selects the Synchronous V.13 Protocol. V.13 mode is a simulated controlled carrier mode designed for polling applications. It uses the ITU-T V.13 RTS/DCD signaling method to control the remote modem's DCD lead via the local modem's RTS lead. The RTS/DCD signaling can be configured for either bi-directional or unidirectional control by the &E command.

  • Page 68: Clock Selection

    Operation Synchronous Operation Clock Selection The synchronous format relies on transmit and receive clocks to maintain character timing, so it does not need start and stop bits for each character. The modem can be configured to use one of the following three clock sources to transmit synchronous data: •...

  • Page 69: Switched Network Operation

    Operation Switched Network Operation Switched Network Operation To establish a connection with another modem, use the auto-dial facility of the modem. Telephone Lines If the modem is connected to a business telephone system, such as a multi-line key system or PBX, there can be noise generated by the system that can affect telephone quality.

  • Page 70: Private Line Operation

    Operation Private Line Operation Private Line Operation The modem can be configured to operate over a point-to-point, unconditioned, voice grade private line (speech band leased line). Point-to-point private lines rented from the telephone company are dedicated, direct, semi-permanent phone line connections between two locations. In applications that require a continuous data transfer between fixed points, it may be more economical to rent a private line at a fixed rate, than to pay monthly long distance charges for dial up calls.

  • Page 71: Automatic And Manual Handshaking

    Operation Private Line Operation Automatic and Manual Handshaking The modem utilizes a private line "idle" mode to facilitate the use of the AT command set for private line set up. The modems can be put into private line idle via the front panel talk/data switch (SEL key), AT command H, or the MMS command Private Line Talk/Data.

  • Page 72: Terminal Interface Overview

    Telnet Connection 1. When you establish a Telnet connection to the SCM LAN port, the SCM Telnet Login screen is the first to appear, as shown below. Copyright (c) 1993-2005 General DataComm Industries Inc. All rights reserved MGR Application Version 5.90 login: 2.

  • Page 73: Selecting A Unit (Shelf Inventory Screen)

    Operation Terminal Interface Overview Selecting a Unit (Shelf Inventory Screen) From this point, procedures are the same for both types of connection. The Shelf Inventory screen below is for a typical two-shelf installation. The two columns for Slots 17 through 32 do not appear when there is only one shelf.

  • Page 74: Modem Main Menu

    Operation Modem Main Menu Modem Main Menu DUAL SPECTRACOMM V.34 SLOT: 17 LINE: 1 [1] AT SESSION ALARMS [3] DTE STATUS CALL STATISTICS [0] RETURN TO SHELF INVENTORY Select:[ ] Figure 3-3 Terminal Interface Main Menu 5. Type the number that corresponds to the desired menu function and then press Enter.
  • Page 75 Operation Modem Main Menu • The AT parser that acts on the commands is located in DTE interface circuitry. Therefore, the unit can only accept AT commands while it is off-line (idle mode). If you attempt an AT session while the unit is in data mode, it responds with the message: WARNING: THE MODEM IS ON LINE.
  • Page 76 Operation Modem Main Menu 6. Type AT&L0 and press Enter to place the unit into switched line mode so that it does not retrain. As long as the unit you are working with remains in switched line mode, the modem at the far end of the private line continues unsuccessful attempts to retrain.

  • Page 77: Alarms Terminal Interface Screen

    To dismiss the screen, press Enter. Screen data reflects conditions at the moment you accessed the screen. To update the display, dismiss the screen and then selecting it again from the Main Menu by pressing the Enter key. DUAL SPECTRACOMM V.34 SLOT: 17 LINE: 1...

  • Page 78: Call Statistics Terminal Interface Screen

    To dismiss the screen, press Enter. Screen data reflects conditions at the moment you accessed the screen. To update the display, dismiss the screen and then selecting it again from the Main Menu by pressing the Enter key. DUAL SPECTRACOMM V.34 SLOT: 17 LINE: 1...

  • Page 79: Dte Status Terminal Interface Screen

    Screen data reflects conditions at the moment you accessed the screen. To update the display, dismiss the screen and then selecting it again from the Main Menu by pressing the Enter key. DUAL SPECTRACOMM V.34 SLOT: 17 LINE: 1 DTE STATUS...
  • Page 80 Operation Modem Main Menu 3-46 SpectraComm Dual V.34 Modem 060R122-000 Installation and Operation Issue 15...

  • Page 81: Chapter 4: At Command Set Operation

    AT Command Set Operation Chapter 4: AT Command Overview The Dual V.34 modem supports the AT ( AT tention) command set, which includes the basic AT command set and the extended commands sets: AT& , AT% , AT\ , AT: , and AT* . These commands allow the user to obtain information from the modem, configure the modem, establish data communications, test the modem and data communications system In this chapter, a description of each command is provided in...

  • Page 82: At Command Setup

    AT Command Set Operation AT Command Setup 1. Install the V.34 modem as described in Chapter 2, Installation . 2. Select the proper communications port on the terminal or terminal emulator program and ensure 10 bit ASCII is selected. 3. If a communications software package is being used, it will interface with the modem and no further setup is required.

  • Page 83: At Command Reference Tables

    AT Command Set Operation AT Command Reference Tables AT Command Reference Tables This section provides a description of the basic and extended AT commands. They are in alphabetical order, grouped with command variations, if any. All commands are assumed to be preceded by an AT and followed by a carriage return.
  • Page 84 AT Command Set Operation AT Command Reference Tables Character length Sets up the character length and format used by the modem in data mode for front \B n ends that do not send AT commands. The character length includes start, data, parity, and stop bits.
  • Page 85 AT Command Set Operation AT Command Reference Tables Dial This command, followed by the phone number to be dialed, directs the modem to go off-hook and dial the number. Commands other than dial modifiers must not be placed after the D command. Any command that is placed after the D is either ignored or interpreted as a dial command modifier.
  • Page 86 AT Command Set Operation AT Command Reference Tables Simulated controlled Controls the selection of V.13 modes. &E n carrier &E0 Selects Bi-directional V.13. Selects V.13 TX side enabled. &E1 Selects V.13 RX side enabled. &E2 %E n DTE interface-controlled Determines whether tests can be controlled by DTE interface leads. tests Tests cannot be commanded by signals on the DTE interface.
  • Page 87 AT Command Set Operation AT Command Reference Tables DCE rate limit Sets the maximum rate for the modem to make a VF connection to a remote modem. &G n The allowable rates are: 2.4 to 28.8 kbps for V.34, 4.8 or 9.6 kbps for V.32 only, and 4.8 to 14.4 kbps for V.32 bis only.
  • Page 88 AT Command Set Operation AT Command Reference Tables Switched network Controls the selection of the switched network hand-shake mode. &H n handshake mode &X1 When the modem is optioned for an external transmit clock source modem should be optioned for a fixed hand-shake mode, not an automatic hand- shake mode (e.g., select V.32 bis only [&H3] instead of V.32 bis automatic [&H2]).
  • Page 89 AT Command Set Operation AT Command Reference Tables Identification and Requests modem identification and checksum codes to be transmitted to the DTE. checksum Displays the modem product code. The V.34 product code is 288. Displays the stored checksum calculated for the modem's configuration. (reserved for future use) Displays the revision level of the modem's firmware (an alphabetical character) followed by the OK message.
  • Page 90 AT Command Set Operation AT Command Reference Tables Break character handling Determines how the modem will react to break characters received from the DTE \K n during an error corrected data link. Modem will immediately transmit a break character for a fixed time (300 ms) and destroy any currently buffered data.
  • Page 91 AT Command Set Operation AT Command Reference Tables Cellular Power Level Controls the automatic power adjustment of the transmit power level to accommodate the signaling requirements of cellular telephone equipment. Adjustment For both cellular and land based originate or answer modes, if is set, the trans- mit power level used for non-MNP10 or fax connections is the value.
  • Page 92 AT Command Set Operation AT Command Reference Tables On-line Instructs the modem to go on-line (enter data mode) after an escape to local command mode is issued. This command transfers the modem from command mode to data mode. Instructs the modem to go on-line. Instructs the modem to go on-line and issue a retrain sequence if operating in V.34, V.22 bis, V32, or V32 bis modes.
  • Page 93 AT Command Set Operation AT Command Reference Tables Response mode Controls the transmission of result codes. Requests non-quiet mode: result codes are transmitted to the DTE as appropriate. Requests quiet mode: modem does not send any result codes to the DTE. Disables Call Progress Monitor responses in answer mode only.
  • Page 94 AT Command Set Operation AT Command Reference Tables Call Progress Monitor Controls the rate at which Call Progress Monitor (CPM) responses are sent to the %R n message response DTE when the modem is optioned for speed Auto speed last AT speed 300 bps 1200 bps 2400 bps...
  • Page 95 AT Command Set Operation AT Command Reference Tables S-Registers Controls the S-Registers which store values for functions that are not often changed, (i.e., timers or counters), and the ASCII values of control characters. For more information, refer to AT Command Details S n ? Views the value stored in Register S n = x...
  • Page 96 AT Command Set Operation AT Command Reference Tables S-Registers (Continued) Controls the S-Registers which store values for functions that are not often changed. Stores and determines how many tenths of a second (1 to 254) the remote carrier Carrier loss signal must be lost before the local modem disconnects.
  • Page 97 AT Command Set Operation AT Command Reference Tables S-Registers (continued) Controls the S-Registers which store values for functions that are not often changed. Stores and determines how many times (0-255) the modem will retransmit any one Retransmit counter frame when noise is disrupting the reception of a frame and causing data errors. The modem hangs up after it has retransmitted up to the counter limit.
  • Page 98 AT Command Set Operation AT Command Reference Tables Dialing type Instructs the modem to use tone dialing as its selected dialing method. When the is used alone, it sets the modem default to tone dialing. When the command is used in a dial string, it acts as a modifier and affects only the dialing of that string. &T n Test mode Controls the soft operation of test modes.
  • Page 99 AT Command Set Operation AT Command Reference Tables Trellis coding Controls Trellis coding when the modem is operating in V.32 mode at 9600 bps. &U n Enables Trellis coding. &U0 Disables Trellis coding at 9600 bps; Enables partial Trellis coding in V.34 modulation. &U1 Result code type \V n...
  • Page 100 AT Command Set Operation AT Command Reference Tables Display AES Encryption Displays the AES Encryption Key. The private key will not display unless the modem is configured for encryption ( %S11 ). This command is not affected by factory defaults. Display SAM Information Displays the SAM ID, SAM PIN, SAM Private Key, Primary Server phone number and Secondary Server phone number.
  • Page 101 AT Command Set Operation AT Command Reference Tables SAM Parameters %Xn=nnn commands store configured SAM parameter values into EEPROM automatically. The space character is not allowed. Sets a unique SAM ID using from 6 to 32 alphanumeric characters. %X0=nnn Sets the SAM PIN using the least significant 32 hex characters from the 64-character %X1=nnn SAM key file downloaded from the SAC server.

  • Page 102: At Command Details

    AT Command Set Operation AT Command Details AT Command Details This section provides special considerations and detailed lookup tables for certain AT commands. \Tn Command - Special Considerations The \T n command controls the DTE speed, in conjunction with the switched network handshake mode command (&Hn).

  • Page 103: Fn Fixed Configuration Profiles

    AT Command Set Operation AT Command Details &Fn Fixed Configuration Profiles The Fixed Configuration Profile command &F n loads the modem with factory-defined settings for one of four fixed configuration profiles. For each fixed profile, the table below lists the each setting with its associated AT command string.
  • Page 104 AT Command Set Operation AT Command Details Table 4-1 Fixed Profile Settings (Continued) AT Command & Description Fixed Profile 0 Fixed Profile 1 Fixed Profile 2 Fixed Profile 3 &I &I0 &I0 &I0 &I0 Front panel lockout Enable Enable Enable Enable 2-sec.
  • Page 105 AT Command Set Operation AT Command Details Table 4-1 Fixed Profile Settings (Continued) AT Command & Description Fixed Profile 0 Fixed Profile 1 Fixed Profile 2 Fixed Profile 3 S-Registers: Decimal (ASCII) S0=1 S0=1 S0=1 S0=1 Rings to answer on S2=43 S2=43 S=243...
  • Page 106 AT Command Set Operation AT Command Details Table 4-1 Fixed Profile Settings (Continued) AT Command & Description Fixed Profile 0 Fixed Profile 1 Fixed Profile 2 Fixed Profile 3 Last AT speed Autobaud Last AT speed Autobaud DTE speed Inactivity Timer Disabled Disabled Disabled...

  • Page 107: Vn Connect Messages

    AT Command Set Operation AT Command Details \Vn Connect Messages The following tables list the messages enabled by the \Vn command, including the meaning, the verbal text response and the numeric code response of each connect message. Verbal text responses are terminated by carriage return <...
  • Page 108 AT Command Set Operation AT Command Details Table 4-3 \V0 and \V1 Connect Message Descriptions NUMERIC (V0) MEANING VERBAL RESPONSE (V1) No Protocol PROTOCOL:NONE V.42 Protocol PROTOCOL:V.42 V.42 bis Protocol PROTOCOL:V.42BIS MNP Protocol PROTOCOL:ALTERNATE MNP Class 2 PROTOCOL:ALTERNATE,CLASS 2 MNP Class 2+4 PROTOCOL:ALTERNATE,CLASS 2 + CLASS 4 MNP Class 2+4+5 PROTOCOL:ALTERNATE,CLASS 2 CLASS 4 CLASS 5...
  • Page 109 AT Command Set Operation AT Command Details Table 4-5 \V2 Connect Message Descriptions NUMERIC (V0) MEANING VERBAL RESPONSE (V1) Command was successful Link established CONNECT Incoming ring detected RING Link dropped NO CARRIER Command failed ERROR Link established at 1200 CONNECT 1200 Dial tone not present NO DIALTONE...
  • Page 110 AT Command Set Operation AT Command Details 4-30 SpectraComm Dual V.34 Modem 060R122-000 Installation and Operation Issue 15...

  • Page 111: V.25 Bis Protocol Overview

    V.25 bis Command Set Chapter 5: Operation V.25 bis Protocol Overview This chapter describes the operating procedures for the Dual V.34 Modem when using the ITU-T (formerly CCITT) V.25 bis compatible command protocol. Although the AT command set is the primary command set for configuring the modem, the modem provides an enhanced ITU-T V.25 bis command protocol that permits you to configure modem dial parameters and establish data communications.

  • Page 112: V.25 Bis Operating Modes

    V.25 bis Command Set Operation V.25 bis Protocol Overview V.25 bis Operating Modes The ITU-T V.25 bis protocol operates in one of two modes, named for the two ITU-T designations for circuit 108 of the terminal interface: 108.2 mode or 108.1 mode. •...

  • Page 113: Commanding The Modem

    V.25 bis Command Set Operation Commanding the Modem Commanding the Modem When entering commands, terminate each one with a line feed <LF> control character. The modem sends a response back to the terminal for each command. Table 5-2 explains responses to valid commands.

  • Page 114: V.25 Bis Configuration Commands

    V.25 bis Command Set Operation Commanding the Modem Table 5-3 Explanation of Invalid Responses Command Invoked Description of INV Response INC not received. Non-selectable option in user's country. V.25 bis Configuration Commands Configuration commands allow you to configure the modem. Write Option Settings to User Configuration Profile NVW saves the current settings to a user configuration profile in the modem's non-volatile memory, with the exception of the Terminator Character option (which is set to its factory default, the line...
  • Page 115 V.25 bis Command Set Operation Commanding the Modem To return to V.25 bis command set mode, use the AT%Vn command. To invoke this command, type: PRS AT <LF> PRS CM Connect Message Inhibit PRS CM controls the CNX yy connect message responses. The V. 34 supports both the 1989 and the 1984 recommendations for V.25 bis connection procedures.
  • Page 116 V.25 bis Command Set Operation Commanding the Modem To invoke this command, type: PRS DR ; n <LF> where n is the DTE rate, as follows: rate rate Autobaud 19,200 bps Last connect speed 21,600 bps 300 bps 24,000 bps 1200 bps 26,400 bps 2400 bps...

  • Page 117: V.25 Bis Communication Commands

    V.25 bis Command Set Operation Commanding the Modem PRS TR Termination Character PRS TR selects the ASCII character that represents the command termination character in the asynchronous mode. The command termination character is the character used to enter a command for interpretation by the modem.
  • Page 118 V.25 bis Command Set Operation Commanding the Modem Call Requested Stored Telephone Number CRS causes the modem to dial the telephone number stored in a specified modem memory cell. The number to be dialed must have been stored in a memory cell previously by means of the PRN command.

  • Page 119: Itu-T V.25 Bis Command Procedures

    V.25 bis Command Set Operation ITU-T V.25 bis Command Procedures ITU-T V.25 bis Command Procedures The following paragraphs describe communication operating procedures for the V. 34 using the ITU-T V.25 bis command set. The descriptions include procedures for originating, answering, and terminating a call in the 108.2 and 108.1 modes.
  • Page 120 V.25 bis Command Set Operation ITU-T V.25 bis Command Procedures • A long space is received and long space disconnect has been enabled by the Yn AT command. This mode of automatic termination functions only when the modem is operating at 300, 1200, or 2400 bps.

  • Page 121: 108.1 Mode Operating Procedures

    V.25 bis Command Set Operation ITU-T V.25 bis Command Procedures 108.1 Mode Operating Procedures Originating a Call Automatically To establish communication by automatically originating a call in the 108.1 mode: 1. Prior to the time of calling a telephone number must be stored in the modem’s memory cell 0. That can be done with either the 108.2 mode PRN command or the AT command &Zn=nnn.

  • Page 122: V.25 Bis 108.2 Mode Interface Specifications

    V.25 bis Command Set Operation V.25 bis 108.2 Mode Interface Specifications 3. Hang up the handset. You may now commence data communications. 4. To terminate communication, turn Off terminal interface circuit 108.1. V.25 bis 108.2 Mode Interface Specifications Physical connections between a DTE and a DCE may be either synchronous or asynchronous. The ITU-T V.25 bis 108.2 mode recommendations describe the exchange of commands and responses between the units using both types of operation.

  • Page 123: Synchronous Format Selection

    V.25 bis Command Set Operation V.25 bis 108.2 Mode Interface Specifications Synchronous Format Selection The V. 34 supports both the bit-oriented and the byte-oriented modes of synchronous operation. Synchronous Bit-Oriented Operation The modem uses the HDLC format in the bit-oriented synchronous mode (%V2 AT command). The structure of each message in this format is shown below: Time Message...

  • Page 124: Asynchronous Format

    V.25 bis Command Set Operation V.25 bis 108.2 Mode Interface Specifications Asynchronous Format The structure of each message in the asynchronous mode (%V1 AT command) format is shown below: Time Message = Interface idle Message = Command/Response (10-bit characters: 1 start, 7-bit ASCII data, 1even parity, 1 stop) = ASCII Line Feed Character (00001010) Modem Test Modes...

  • Page 125: Chapter 6: Tests

    Tests Chapter 6: Overview This chapter describes tests that can be invoked to isolate a trouble condition. The tests can isolate a problem to the data connection, data set operation, or the DTE interface level. See Figure 6-1 a sequence of tests for fault isolation. Note On-line tests, which involve data transmitted from one modem to another, can be performed with the modems operating in either synchronous mode or direct (N1) asynchronous mode.

  • Page 126: Analog Loopback (Analoop)

    Tests Analog Loopback (ANALOOP) Analog Loopback (ANALOOP) The Analog Loopback (AL) test mode, illustrated in Figure 6-2, is provided to isolate problems in the data set operation and the DTE interface. Specifically, AL tests modem modulator/demodulator operation, DTE receive/transmit operation, and DTE interface operation. This test can be controlled from the front panel or by AT commands.
  • Page 127 Tests Analog Loopback (ANALOOP) Enter test data at the DTE. Compare the data that was entered at the DTE with the data that is looped back and displayed by the DTE. DRIVER LOGIC HELLO Communications INTER- ANALOOP Line FACE ..ANALOG ..

  • Page 128: Analog Loopback With Self-Test

    Tests Analog Loopback with Self-Test Analog Loopback with Self-Test Analog Loopback may be combined with Self-Test, as illustrated in Figure 6-3. Upon initiation of Self-Test, a pattern is generated by the transmitter and sent to the receiver for analysis. The pattern is made up of alternate ones and zeros for speeds of 1200 and 2400 bps.
  • Page 129 Tests Analog Loopback with Self-Test If the timer (S-Register 18) is set to a non-zero value, the test terminates automatically when the timer expires (10-second increments). PATTERN GENERATOR DRIVER LOGIC HELLO Communications INTER- Self-Test ANALOOP Line FACE ..ANALOG ..LOGIC RECEIVER ERROR...

  • Page 130: Digital Loopback

    Tests Digital Loopback Digital Loopback The modem can be commanded to enter digital loopback, illustrated in Figure 6-4, via AT commands. This loopback is used while a call to the distant modem is established. In digital loopback, the local received data is coupled to the transmitter input, so that the remote unit can perform a loopback test without commanding remote loopback.

  • Page 131: Remote Digital Loopback

    Tests Remote Digital Loopback Remote Digital Loopback Remote Digital Loopback, illustrated in Figure 6-5, is controlled at the local end. It can be commanded with AT commands. The loopback can be commanded only after a call is established and both ends are in data mode. In this loop, the de-scrambled received data from the demodulator at the remote end is coupled to the remote transmitter input for transmission back to the local end.

  • Page 132: Remote Digital Loopback With Self-Test

    Tests Remote Digital Loopback with Self-Test Remote Digital Loopback with Self-Test Remote Digital Loopback with Self-Test, illustrated in Figure 6-6, is controlled at the local end. It can be commanded with AT commands. This command can only be entered after the call is established and both ends are in the data mode.

  • Page 133: End-To-End Self-Test

    Tests End-to-End Self-Test End-to-End Self-Test End-to-End Self Test, illustrated in Figure 6-7, requires operators at both the local and remote modem. It can be commanded only with AT commands. The commands can only be entered after the call is established and both ends are in the data mode. The test causes each modem to generate a pattern and to transmit it to the other modem.

  • Page 134: Rdlb Requests

    Tests RDLB Requests If the timer (S-Register 18) is set to a non-zero value, the test terminates automatically when the timer expires (10-second increments). PATTERN GENERATOR DRIVER LOGIC HELLO Communications INTER- Line FACE ..ANALOG ..LOGIC RECEIVER ERROR DETECTOR local modem 2.
  • Page 135 ASCII Character Set Appendix A: Character Decimal Hexa-decimal Binary Character Decimal Hexa-decimal Binary 00000000 00100000 CTRL A (SOH) 00000001 00100001 CTRL B (STX) 00000010 " 00100010 CTRL C (ETX) 00000011 00100011 CTRL D (EOT) 00000100 00100100 CTRL E (ENQ) 00000101 00100101 CTRL F (ACK) 00000110...
  • Page 136 ASCII Character Set 01000000 01100000 01000001 01100001 01000010 01100010 01000011 01100011 01000100 01100100 01000101 01100101 01000110 01100110 01000111 01100111 01001000 01101000 01001001 01101001 01001010 01101010 01001011 01101011 01001100 01101100 01001101 01101101 01001110 01101110 01001111 01101111 01010000 01110000 01010001 01110001 01010010 01110010 01010011 01110011...
  • Page 138 The Best Connections in the Business...

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