Multi-Tech Systems MT2834BA, MT2834BL manual Callback Feature Description

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Chapter 7 - Callback Security and Remote Configuration

7.1Introduction

This chapter describes how the MultiModem’s Callback and Remote Configuration features operate. These features use a multilevel security system, which involves the use of LOGIN Passwords, Setup Passwords and Remote Escape Characters.

The primary level security code is the modem’s LOGIN Password. Once this password is entered, other passwords can be used. For instance, entering the LOGIN Password will allow you to enter the Setup Password, which, in turn, allows you to enter Callback Passwords and dial back phone numbers. Callback Passwords tell your modem what dial back phone number to call.

The Remote Escape Character is the key to using the Remote Configuration feature. The Remote Escape Character lets you enter Command mode via a remote call, so that you can enter AT commands just as if you were locally connected. You must also enter your modem’s Setup Password. The Remote Escape Character is contained in S-Register S13.

7.2Callback Feature Description

The Callback feature protects your network from unauthorized access and helps control long distance costs. By use of Callback Passwords and dial back phone numbers, you can have your modem "dial back" remote locations immediately after being called. A special command (Enable Callback #DB) turns your modem into a Callback security modem. The Callback Password/Phone number entry is protected by two-level security (your modem's LOGIN Password and Set-Up Password) that keeps unauthorized personnel from changing parameters. When you first get your modem, you need to change both security level codes to your unique settings.

The Callback Passwords and dial back phone numbers are in a special Callback Password/dial back phone number memory (30 numbers long). You use the modem's LOGIN Password and the Set-Up Password plus special Callback commands to access this memory. The memory is thirty numbers long and replaces your modem's normal phone number memory.

Each number is 35 characters long and can contain commands as well as phone numbers. You need to set up your modem with the numbers and codes as part of the dial back initialization procedures. Your modem will also remember if the incoming call was reliable or not, and make the call back accordingly.

Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide

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Contents User Guide Record of Revisions Date Description User GuidePatents TrademarksContents Index 117 RegistersIntroduction and Description Introduction How To Use This ManualModem Features Fax Features 1 MT2834BA/BL Series FeaturesTechnical Specifications Power MT2834BA LED Display Modem LED IndicatorsControls on PC Board Installation and Connection Installation What Is in Your Modem Package?Safety Warnings Installation ProcedureMultiModemBA Connections Is Your Modem Ready for Use? Installing PhoneTools, the Data Communications SoftwareSoftware Configuration and Modem Basics Configuring Software for Your Modem Configuring Your SoftwareSoftware Configuration PC Initialization StringsConfiguring Software for Your Computer Changing Default ParametersOther Parameters AT &F S0=0 &F9 &W0 CRAnswer/Originate Voice/Data Toggle Switch Modem BasicsSimple Operations Manual Dial and Automatic Answer Manual Dial and Automatic Answer Dialing/On-Line/AnsweringManual Dial Backup Call Termination Dial Backup and Leased Line RestoralAutomatic Leased Line Restoral Operation Manual Call Origination Dial-Up OperationManual Answering Automatic AnsweringAbort Timer Handshaking DetailsCall Termination Command Mode AT Command Editing Command ModeFunctional Modes Functional Modes Summary of AT CommandsStore Modem Configure Data Result Codes Multi-Tech Result CodesStandard AT Result Codes Dialing Action Commands Dialing CommandsVoice/Data Dialing $VD Dial Modifier CommandsPulse or Tone Dial P T Set Pulse Dial Ratios &PReverse the Mode of Operation R Return to Command Mode After Dial Command ExecutionAutomatic Pauses in Dialing Long Space Disconnect YQuiet Answer @ Calling Card Detect Tones $Storing Phone Numbers D...N Phone Number Memory CommandsNumber Linking NN Listing Numbers Stored in Memory LConfiguration and Default Storage Commands Loading Factory Defaults &FModem Reset Z Async/Sync Mode Switching &M Unix Uucp Spoofing $SPSynchronous Transmit Clock Select &X Echo Command Mode Characters E Command Response Result Code CommandsResult Codes Enable/Disable and No Response Answer Q Result Codes Multi-Tech or Standard AT &QResult Codes Basic and Extended and Call Progress Selection Enable/Disable Trelis Coded Modulation #T Phone Line Conditioning CommandsGuard Tones Not Used in BAI/BLI Models &G Bell/V.21 ToneEnable/Disable Lowspeed Fast Connect $FC Fallback Modes When On-Line #FCleardown at Disconnect &CD Auto Speed Detect #ACarrier Detect Control &C 7 RS-232C Interface Control CommandsData Terminal Ready Control &D CTS Control &RData Set Ready Control &S CTS/RTS Interaction Control &RFDSR/CD Interaction Control &SF Normal Mode &E0 Error Correction CommandsAuto-Reliable Mode &E1 Reliable Mode &E2Auto-Reliable Buffering $A Mode Select #LEnable/Disable Auto Reliable Fallback Character $F Error Correction/300bps $ERetransmit Count $R Flow Control Commands Hardware Flow Control &E4Xon/Xoff Flow Control &E5 Xon/Xoff Pass-Through &E7 Send Xon/Xoff Characters #XHewlett-Packard ENQ/ACK Pacing &E9 Terminal/Computer Initiated Pacing &E13 Normal Mode Modem Flow Control On &E11Maximum Block Size &BS Parity Selection #PNormal/Auto-Reliable/Reliable Mode Commands Xon/Xoff Pass-Through CommandsEnq/Ack Pacing Commands Speed Conversion Commands Speed Conversion $BAModem Baud Rate $MB Serial Port Baud Rate $SB Immediate Action Commands Off Hook H Listing On-Line Diagnostics L8Line Probe Commands Force Answer Mode aExiting Command Mode, Going Back On-Line O Registers Rings Which Have Occurred Number of Rings Until Modem AnswersEscape Code Character Return CharacterLine Feed Character Time for Carrier Abort TimerBackspace Character Wait Time for Dial ToneS13 Remote Configuration Escape Character S10 Carrier Loss Disconnect Delay TimeCarrier Detect Response Time S11 Tone Dialing Tone Spacing and DurationS19 MT2834BL Only Dial-Back Timer S15 Callback Time DelayS16 Callback Attempts S17 Changing Break TimeS29 Local Inactivity Timer S26 Failed Password AttemptsS24 PBX/CBX Disconnect Drop Time for DSR/CTS/CD S25 DTR Dropout TimeS32 Time Elapse for Escape Sequence S30 Inactivity TimerS36 Time Between DTR Inactive and Modem Off-Hook S37 Time Between DTR Active and Modem On-HookS48 Program V.34bis Connect Speeds Reading and Assigning S-Register Values Examples of Assigning ValuesExamples of Reading Values AT Command and S-Register Summary Callback Security and Remote Configuration Callback Security and Remote Configuration Callback Feature DescriptionTo change your Remote Configuration feature status Remote Configuration DescriptionAT#CBN0xxxxxxxxxxCR To set parity of the password/message promptCallback Operational Sequence Procedures Remote Configuration Operation Procedures Remote Configuration ProceduresRemote Configuration and Callback Security AT Commands Remote Configuration/Callback Security S-Registers DIP-Switch Settings MT2834BA PC Board Dip-Switch SettingsDIP-Switch Option Settings Switch #4 AS/400 Mode Synchronous Mode/Leased Line/Dial-UP = Down Down Dip-Switch Settings Speaker Volume Control Switch Function Position Effect Recording Option ConfigurationsDIP Switches #13-14 DIP Switches #15-16 MT2834BADIP Switches #15-16 MT2834BL Warranty, Service and Tech Support Warranty, Service, and Technical Support Multi-Tech Systems, Inc. Warranty & Repairs PoliciesRepair Procedures for International Distributors Online Warranty RegistrationTechnical Support Replacement PartsInternet Sites Country TelephoneAppendixes Upgrade Overview Appendix a Upgrading Your Modem’s FirmwareAppendix a Upgrading Your Modem’s Firmware Download the Upgrade File Upgrade the Modem’s Firmware None of the LEDs Light When the Modem Is On Appendix B TroubleshootingModem Does Not Respond to Commands Appendix B TroubleshootingAppendix B Troubleshooting Modem Dials But Cannot Make a Connection Modem Disconnects While On-line Modem Cannot Connect When AnsweringFile Transfer Is Slower Than It Should Be Am Losing DataAm Getting Garbage Characters on the Monitor Appendix C AT Command Summary Appendix C AT Command SummaryCommand Values Description Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide 100 DsNdMulti-Tech Systems, Inc. MT2834BA/BL Series User Guide 101 $FCn MT2834BLMulti-Tech Systems, Inc. MT2834BA/BL Series User Guide 102 $MBnMulti-Tech Systems, Inc. MT2834BA/BL Series User Guide 103 $SBnMulti-Tech Systems, Inc. MT2834BA/BL Series User Guide 104 Dial ToneCallback Security/Remote Configuration Command Summary 25bis Commands Password Command SummaryAppendix D V.25bis Operation Delayed and Forbidden Numbers25bis Operation Appendix D V.25bis Operation25bis DIP-Switches 25bis Mode AT Commands25bis Set-Up and Initialization Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide 108Enable/Disable V.25bis Mode $V Command 25bis AT CommandsChange Serial Baud Rate CSP Command 25bis Responses Result CodesListing Delayed Phone Numbers RLD Command Dial Phone Number Provided CRN CommandListing Forbidden Phone Number RLF Command Disregard or Connect to Incoming Calls DIC or CIC CommandITU V.25bis Country Specific Information Appendix D V.25bis Operation Belgium SingaporeMulti-Tech Systems, Inc. MT2834BA/BL Series User Guide 112 Appendix E MultiModemBA/BL Cables Appendix E MultiModemBA CablesAppendix F Regulatory Information FCC Part 68 TelecomFCC Part Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide 115 Canadian Limitations NoticeMulti-Tech Systems, Inc. MT2834BA/BL Series User Guide 116 South African NoticeMulti-Tech Systems, Inc. MT2834BA/BL Series User Guide 117 IndexMulti-Tech Systems, Inc. MT2834BA/BL Series User Guide 118 91-116Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide 119 PBX/CBX Disconnect Drop Time for DSR/CTS/CD63