Dial Backup | Motorola V.3600 specification

AT Commands

Dial Backup

Dial backup allows the modem to switch to a dial backup mode if the data connection on the leased line is unacceptable for communications. This can be accomplished in two ways:

•Automatic - backup due to extended loss of carrier or 4 unsuccessful retrains in 3 minutes

•Manual - user determined using front panel controls or AT commands

In leased line operation, if both units have autodial backup enabled, one must be configured for forced answer. This prevents both units from dialing if the leased line fails.

IMPORTANT: Both methods will cause the modem to dial the prestored autodial number. The originate modem will wait for five seconds and then initiate the call. The answer modem will wait for a ring. The modems then train and begin communicating over the dial-up line. If the dial connection is unsuccessful after three attempts, a retrain on the leased line will be initiated.

In manual mode, the return to leased line is only done when commanded. In automatic mode the return to leased line is initiated after the lookback time in register S28 has elapsed. To prevent unnecessary termination of the dial line connection, a leased line lookback test is performed. If the leased line is not acceptable, the dial connection is resumed with a retrain. If the leased line is acceptable, the dial connection is dropped and normal leased line mode is resumed.

When the unit attempts to return to leased line, the LCD displays LEASE LOOKBACK. If the leased line has been restored to service, data can be passed approximately 10 seconds after LEASE LOOKBACK was initiated. The LCD will continue to display LEASE LOOKBACK for slightly more than a minute. During this time the dial line connection is maintained if a return to dial line operation is required. When the LCD displays ON LINE again the dial line is disconnected.

Note

A diagnostic test initiated during dial backup mode terminates when the modem performs a leased line lookback.

V.3600

5-35

Image 87

Motorola V.3600 manual Dial Backup

Contents

3600 Modem User’s GuideMotorola Updates CopyrightTrademarks FCC Requirements Regulatory Information FCC Part 15 Declaration Of Conformity FCC Fax Branding RequirementsModel Name V.3600, 115 VAC version only Model Name V.3600, all other versions Shielded Cables Industry Canada IC Requirements Special Requirements For Canada Canadian Emission Requirements V.3600, other versions Ringer Equivalence NumberPage Contents Contents Contents Protocols Test Mode Operation Security Status Registers Fax Operation Contents 25 bis Autodialer Appendix B. Phone Jack Descriptions MaintenanceAppendix A. Specifications Appendix D. Fault Isolation Procedure Appendix E. Command Index and Defaults Shelf-Mount Units Chapter Introduction Data Mode Features Internet Browser Fax ModeSoftware Communications Software Class 1 Fax Communications Software Description FunctionalPhysical Rear Panel 115 Vac Model RM16M Version RM16M Unit DC Power Connection Chapter InstallationElectrical Installation AC Power Connection DTE Connection Installation Digital Interface Signals Pin Signal Descriptions 140 Telephone Line Connection Dial Mode Pstn Connection Dial jack Direct connection to the Pstn is shown in Figure Leased Line Connection TELSET/LEASED Line Jack Leased Line Connection 115 Vac Model RM16M Connections Shelf-Mount RM16M V.3600 InstallationPage Power-Up Chapter Getting StartedOption Selection Autodialing from Front Panel Autodialing from a Terminal with the AT CommandsPlacing a Call Dialing with a Standard Telephone Ending a Call Answering a Call Condition Reasons for Call Termination Reasons for Call Termination Page LED Descriptions Chapter Front Panel Operation LCD Menu Operation LCD Menus Main Menu Submenu Submenu Item Option Com Reg Main Menu LCD Messages Reg Remote Initiate RATION? OPTIONS? Submenu Main Menu Option Com Reg Lease line only † Dial line only 3600 Modify Change DTE Speed DTE=DCE Modify Change DTE Dial Method Async Modify Change DTE RTS/CTS Delay Password of 0000 disables front panel security 3600 Front Panel Security Page Chapter AT Commands Command CategoriesOperation Modes Sending Commands to the Modem Offline Command ModeOnline Command Mode Autobaud Guidelines for Creating Command Statements Creating a Command Statement AT Backspace Key Command Statement BufferRepeating a Command a Monitor Display Response Commands Numbered CommandsGroup Commands Connect Message Codes \V Digit / Word SelectionResponse Displays Q Negotiation Displays W Call Progress / Connect Speed Messages Number Code Application *RC Command Code Set Number Operation Message Meaning Response Number Codes / Messages DTE rate 31200 bps Connect 300/V42 Connect 300/MNP5 Dialing D Dial Commands Tone Dialing T Pulse Dialing PInsert Long Pause Hook Flash Switching to Answer Mode after Dialing RRemaining in Command Mode Wait for Second Dial Tone W Voice Calls Wait for 5 Seconds of Silence @Dialing a Stored Telephone Number Sn Autodial Number Location *AUn Autoanswer S0 Switching from Voice to DataAT Command Answer a Manual Answer Caller ID Messages Modem sends this message Distinctive Ring *DR Data Carrier Detect &C Terminal Interface Commands Data Terminal Ready &D Data Set Ready &S Request to Send / Clear to Send &R Serial Port Ring Indicator Pin 22 \R Local Character Echo E General CommandsChanging from Data Mode to Command Mode +++ DTE Controlled Fallback Rate Pin 23 *FB Online Character Echo F Hanging Up H, H1Fast Disconnect H2, H3 Speaker Volume L Eprom CheckSpeaker Control M Bis Guard Tones &G Asynchronous / Synchronous Mode Selection &MReturn Online O Long Space Disconnect Y Comman Operation Make / Break Dial Pulse Ratio &P Modulation *MM Synchronous Transmit Clock Source &XRate Selection Thresholds *TH Asymmetric Bit Rates *AS Maximum DCE Speed %B Minimum DCE Speed %L Automatic Rate Adaption %R Auto Retrain %E Product Revision Level %V Manual Rate Adaption *RR Fast Train *FT Online Quick Reference $HProduct Serial Number $V Talk / Data *DA Dial Line Transmit Level *TDn Disable AT Command Set *NTWire Operation Private Line Operation Wire Dial-up Operation Wire Leased Line Operation Dial Backup Dial / Leased Line &L Dial Backup *DBReturn to Leased Line from Dial Backup *LB Manual Dial Backup *LD Stored Profile Configuration CommandsConfiguration Profiles Active Profile Powerup Option Set &Y Storing a Configuration &W Load Factory Options &Fn Reset to Stored Configuration Z View Configuration Profiles/Received Signal Options &V Storing a Telephone Command Line &Zx=n, *CNx,n, *ND Remote Configuration Soft Download Password %P1, $YRetaining / Restoring Options *RO Remote Security Code %P= Remote Configuration Security Enabling/Disabling Remote Configuration *RA Entering Remote Configuration %T=, &T Remote Configuration Format *RF Remote Configuration DTE Speed *RB Remote Configuration Saving or Discarding Options *RQ Page Ccitt V.42 bis Error Control Protocol Reliable ModeChapter Protocols Data Compression Auto-Reliable ModeNormal Mode Constant Speed Interface Direct Mode Protocol CommandsFlow Control Constant Disconnect Buffer Delay Q%DCommand Operation Disconnect buffer delay disabled Serial Port DTE Constant Speed \J Fast detect data sequence enabled Optional Detection Phase \MOperating Mode \N Command Operation Fast detect data sequence disabled Fallback to normal if not successful Command OperationAuto-Reliable Fallback Character %An LAPM, MNP, or normal try both protocols Serial Port Flow Control \Q Enable CTS/RTS bilateral flow control Data Link Flow Control \G Command Operation Disable data link flow controlEnable data link flow control XON/XOFF Pass Through \X Break option Break Control \Kn Maximum Reliable Block Size \A Inactivity Timer \T Transmit Break / Set Break Length \B Set Auto-Reliable Buffer \C42bis Data Compression %C Page Chapter Test Mode Operation Test CategoriesTest Offline Online Grant remote requested digital loopback Terminating a Test in Progress Q&T Local Analog Loopback &T1 Testing the Local Modem Local Analog Loopback with Self Test &T8 Testing the Remote Modem Grant/Deny RDL Request &T4, &T5 Local Digital Loopback &T3 Remote Digital Loopback with Self Test &T7 Remote Digital Loopback &T6 Test Pattern %T Bilateral Digital Test Enable / Disable *DGCommand Operation Bilateral digital loop disabled Bilateral digital loop enabled DTE Controlled Remote Digital Loopback Pin Command Operation Ignore pinRDL enabled pin LAL enabled pin Autocallback Security Chapter Security Remote Operation Low Security OperationOperating without Low Security Operating with Low Security Restrictions in Security Operation PasswordsLocal Operation LCD Indication of Security High Security Low Security Commands Security Levels Superuser High Security Commands Default PasswordsEnabling High Security $EH=pw Setting Passwords $Pn=pw$pw Disabling High Security $DSet Security Levels $Ln=m Set User Callback Number $Cn=m Extended Features $WDisplay Extended Feature Status $W? Display/Reset Illegal Access Attempt Counters $M, $Mn, $M Factory Reset $F=pw$pw Removing a User $RnSecurity Status $E? Verify User Information $In, $IBn Local Logon Command $n=pwLocal Logoff Command $$ Display User Status $S? $n=pw Remote Logon Procedure $n=pw Fax Operation Chapter Fax Operation Fax Defaults Modem InitializationFax Autoanswer Fax Associated Options Class 1 DetailsStored Fax Profile Dial Command D Class 1 Commands AT Responses to the ATD Command Answer Command a Off Hook H1 Service Class Indication +FCLASS?Service Class Capabilities +FCLASS=? On Hook H Value Modulation Speed Transmit Silence +FTS=TimeReceive Silence +FRS=Time Fax Transmit and Receive Modes Facsimile Receive +FRM=Mod Facsimile Transmit +FTM=Mod Hdlc Transmit +FTH=Mod Hdlc Receive +FRH=ModTest Supported Range of Values +FTx=?, +FRx=? Fax Autoanswer +FAA= Class 1 Result Code +FCERRORCommand Description Binary File Transfer Registers Chapter Status Registers Changing S-Register Values Changing Register Values Sn=v, Sn=v Register Operation Sn?, Sn? ATSn.#=v Individual Bit Command Sn . # =v End-of-Line Character S3 Autoanswer S0Ring Count S1 Escape Character S2 Dtmf Tone Duration S11 Pause Interval for Comma S8Carrier Detect Time S9 Lost Carrier Detect Time S10 S13 Escape Sequence Pause S12 S15 Bit Mapped S14 S19 Test Timeout S18System Tests S16 S17 Bit Mapped S22 Bit Mapped S21 DTR State Recognition S25 RTS/CTS Delay S26Bit Mapped S23 S24 Lookback Timer S28 Bit Mapped S27Bit Mapped S29 S31 Bit Mapped S30 S33 DTR / Dial Backup Number to Dial S35Remote Configuration Escape Character S41 Bit Mapped S32 Xoff Character from DTE S45 Remote Configuration Guard Time S42S43 XON Character from DTE S44 Leased Line Transmit Level S52 Automatic Rate Adaption Threshold S53Flow Control S54 S55 Compression Control S56Bit Mapped S57 Inactivity Timer S58 Break Control S59Bit Mapped S60 Disconnect Buffer Delay S62 DTE Options S61Maximum Transmit Block Size S63 S68 Auto-Reliable Fallback Character S64S65-66 Link Speed Status S67 33,600 bps DCE Independent Speed S69 Lapm or MNP or native auto-reliable Operating Mode S70Operating Mode Status S71 Enable V.42 fast detect Callback Retry S75 Password Timeout S73Callback Delay S74 Bit Mapped S72 Break Length S79 Callback Retry Delay S76Autocallback Timer S78 Lockout Threshold S77 S80 register indicates the serial port speed Serial Port or DTE Speed S80 S83 Enable negotiation statusMinimum DCE Speed S81 Negotiation Status S82 Current Modulation S91 S85-S87Modulation Type S88 S89-S90 Bit Mapped S97 Settings S95Asymmetric Settings S96 S92 S94 Select Sync Data Chapter Bis Autodialer Software Guidelines Autodialer Command Strings and Parameters Invalid Responses Access these formats using Dial Parameters Dial Parameters Dial Command CRN nn...n Bis Commands and Responses Program Number Command PRN ann...n Intermediate Call Progress ResponseDial Stored Number CRS a Disregard Incoming Call DIC Request List of Stored Numbers RLN Connect Incoming Call CIC Redial Last Number CRR nLink Number by Address PRL ab Request List of Delayed Numbers RLD RLD Request List of Linked Numbers RLL Request List of Version RLV Modem Options Command PRO xxxyy00 Invms Invalid command message syntax error Examples PRO011 Restore Factory Settings PRP n Save Current Settings PRK Request List of Stored Options RLO xxx yy Options Option Definition Settings Default 11-16 3600 3600 11-17 Settings Default General Chapter MaintenanceFuse Replacement Maintenance Calling Technical Support Maintenance Appendix a Specifications Fax Modulation Modem Data RatesFax Rates Modulations Telco Connection TestingRTS/CTS Delay Carrier Detect LevelPage Appendix B Phone Jack Descriptions Dial Pin FunctionsTELSET/LEASED Line Pin Functions Page Appendix C Hardware Options Jumper Option SelectionRemoving the Cover Figure C-1. Cover Removal Figure C-2. Jumper Location for Ground Option Ground Option Jumper Replacing the Cover Standard Phone Appendix D Fault Isolation ProcedureFault Isolation Procedure Telephone Interface Part Modem and Telephone Line Check 3600 Page Command Reg Description Appendix E Command Index and Defaults Response messages Set H command to V.32 †Speaker off when carrier is present Response displays on Appropriate connect codes Negotiation display enabledWait for dial tone, detect busy signal Restore factory configuration 1 † CTS forced on Dial line †Asynchronous dial / asynchronous data 39/61 pulse make / break ratio Powerup with user option set #1 Grant remote commanded digitalView configuration profiles Store current configuration to user option Bps max Disable disconnect buffer delay Disable slaved DTE/DCE speed Disable automatic rate adaptionTransmit a break signal Disable auto-reliable buffer Enables bilateral CTS/RTS flow When call is answeredLapm with MNP and normal fallback Disables bilateral digital loop Disable protocol result codesSwitches modem to talk mode † Manual dial backup operation 15 4800 bps, 18 9600 bps Command Reg Description Automode modulationAT command set enabled Originate 10-2BER High rate selection threshold Class 1 Commands Valid in Only Fax Mode Caller ID CommandsDistinctive Ring Commands Fax Commands Can be one of the following values 0 or Reinitialize security Security CommandsDisable security High Security Disable user changes password and callback number Enable remote configuration Remote Configuration Commands Status Registers Default Reg Function Factory Set Reg Function Factory Set 10-27 Current modulation Synchronous Description Command Bis Dialer Commands Response Messages Response Message Meaning Factory Option Set #1 Factory Option Sets Factory Option Set # Factory Option Set #3 Modem Options DCE rate Factory Option Set #5 Factory Option Set # Synchronous 2-wire Leased Line Normal Originate AT&F7 Synchronous 2-wire Leased Line Forced Answer AT&F8 Factory Option Set #9 Page Binary Decimal Hexadecimal Appendix F Ascii and Ebcdic Characters Decimal Hex Symbol Key Symbol ¢ cent ACK0 143 144 145 Ascii and Ebcdic Characters Ascii and Ebcdic Characters EIA Appendix G Abbreviations and Acronyms Abbreviations and Acronyms PIW Xmit Appendix H Flash Upgrade What You NeedSteps For Downloading Flash Upgrade Troubleshooting Appendix I Country-Specific Parameters India Default Available Command Command Name Option Options Japan Malaysia Universal/International Flash Upgrade Service and Support Page General Provisions Motorola Limited Hardware WarrantyTwo Year Limited Hardware Warranty What This Warranty Does Not Cover Warranty-2 Numerals Index Index-2 Index-3 Index-4 Index-5 Index-6 Index-7 Index-8 Index-9 Index-10 3600 Index-11 Index-12 Index-13