DTR Dialing $D Command | Black Box MD1641A, MD1640A specs

SERIES II INTELLIGENT DATA/FAX MODEMS

command or simply have your modem answer the call immediately without waiting the regulation time before answering).

DTR Dialing ($D) Command

DTR Dialing is an alternate method of causing the Series II Modem to automatically dial a number. Data Terminal Ready (DTR) is a signal that comes into the modem from the terminal or computer to which it is connected via pin 20 of the RS232 interface. In DTR Dialing, the modem will automatically dial a stored number as soon as it receives a high DTR signal. The DTR Dialing method is popular when using the Modem in synchronous applications.

To enable DTR Dialing, enter the command AT$D1 and hit Return. The modem will now dial the phone number you have stored as N0 when it receives a high DTR signal (see the D...N command in Chapter 5).

DTR must remain high for the duration of the call, until disconnect. To disable DTR Dialing, enter the command AT$D0 (or AT$D) and hit

RETURN.

When you use DTR Dialing, be sure that DIP-Switch #1 is in the UP position, so that DTR is not forced on.

In addition, when using DTR Dialing in a synchronous application, be sure that DIP-Switch #8 is in the UP position to disable V.25bis Command mode.

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Black Box MD1641A, MD1640A manual DTR Dialing $D Command

Contents

Series II Modem Series II Modem 336+ Series II Modems Series II Intelligent DATA/FAX Modems Contents Manual Dial and Automatic Answer Command Mode Callback Security and Remote Configuration Modem TestingRegisters DIP-Switch Settings Appendix a TroubleshootingOther Appendixes Introduction and Description Introduction How To Use This Manual Manual Dial and Automatic Answer Installation and ConnectionSoftware Configuration AT Command Mode Operation Callback and Remote Configuration Testing Your ModemDIP-Switches Modem Features What is in Your Modem Package? Fax Features Technical Specifications Modulation Mode of OperationIntelligent Features Command Buffer Carrier Frequencies Fax CarrierFrequencies Lease Line Restoral Operating Temperature ConnectorsDiagnostics Indicators Modem LED Indicators Power Introduction and Description Controls on PC Board Safety Warnings Installation and Connection Installation Series II Modem 336 MD1641A Connections Series II Intelligent DATA/FAX Modems Is Your Series II Modem Ready for Use? Operating Your Series II Modem Simple Operations Answer/Originate Voice/Data Toggle Switch Serial Port Limitations Introduction How Can You Identify Your Uart Type? Software Configuration COMnFIFO=1 16550 Uart and Windows Configuring Software for Your Modem Configuring Your Software AT &F X4 S0= 2 M Changing Default ParametersPC Initialization Strings AT &F X4 S0=0 M AT &F X4 &E5 &E13 &D0 M Other ParametersMacintosh Initialization AT &F X4 M AT &F9 &W0 CR Configuring Software for Your ComputerConfiguring Software for the Remote System Software Configuration User Guide for Series II Modems When to Disable Data CompressionTerminal Emulation File Transfer Protocols Disabling Error Correction AT &F S0=0 X4 &E14 MAT &F S0=0 X4 &E0 M Dialing/On-Line/Answering Manual Dial and Automatic Answer Series II Intelligent DATA/FAX Modems Manual Dial Backup Call Termination 336+ Only Dial Backup and Leased Line Restoral 336+ OnlyAutomatic Leased Line Restoral Operation 336+ Only Series II Intelligent DATA/FAX Modems Manual Call Origination Dial-Up Operation 336+ Only Automatic Answering Handshaking Details Manual Answering Call Termination Abort Timer AT Command Editing Command Mode Functional Modes Command Mode Functional Modes Summary of AT Commands Memorize Phone Numbers #L3 #L0#L1 #L2 +++ATCR E14E15 $BA1 #RCBNxx Result CodesSr? Sr= Q1 Standard AT Result Codes Q0 Series II Result Codes Dialing Commands Dialing Action Commands Dial Command DContinuous Redial a or DTR Dialing $D Dialing a Stored Number N Dial Modifier Commands Voice/Data Dialing $VDPulse or Tone Dial P or T Set Pulse Dial Ratios &P Automatic Pauses in DialingLong Space Disconnect Y Return to Command Mode after Dial Command Execution Reverse the Mode of Operation RWait for New Dial-Tone W ATDT101099907247465500$0123 4567 8910 Flash On HookCalling Card Detect Tones $ Quiet Answer @ ATX4&E1&E5&E13&E15DT17247465500N3 Phone Number Memory CommandsStoring Phone Numbers D...N Number Linking NN Listing Numbers Stored in Memory L Loading Factory Defaults &F Configuration and Default Storage Commands Modem Reset Z 32terbo Enable/Disable #V 336 OnlyUnix Uucp Spoofing $SP Synchronous Transmit Clock Select &X Async/Sync Mode Switching &M Chap 5 Command Modeter Command Response Result Code CommandsEcho Command Mode Characters E Result Codes Enable/Disable and No Response Answer Q Result Codes Basic and Extended and Call Progress Selection Result Codes Verbose/Terse Command Mode Phone Line Monitoring Speaker M Phone Line Conditioning CommandsEnable/Disable Trelis Coded Modulation #T Guard Tones &G Fallback Modes When On-Line #F Enable/Disable Lowspeed Fast Connect $FC 336+ OnlyCleardown at Disconnect &CD 7 RS232C Interface Control Commands Auto Speed Detect #ACarrier Detect Control &C Clear to Send Control &R Data Terminal Ready Control &D DSR/CD Interaction Control &SF Error Correction CommandsData Set Ready Control &S CTS/RTS Interaction Control &RF Auto-Reliable Mode &E1 Normal Mode &E0 Answer Mode Reliable Mode &E2Mode Select #L Originate Mode Auto-Reliable Buffering $A Enable/Disable Auto Reliable Fallback Character $F Retransmit Count $R Error Correction/300bps $E Flow Control Commands Modem Terminal Hardware Flow Control &E4 Xon/Xoff Pass-Through &E7 Xon/Xoff Flow Control &E5 Normal Mode Modem Flow Control On &E11 Send Xon/Xoff Characters #XHewlett-Packard ENQ/ACK Pacing &E9 Maximum Block Size &BS Terminal/Computer Initiated Pacing &E13 Parity Selection #P Asynchronous Word Length Selection $EB 336 Only #X1 = #X0 = Speed Conversion Commands Enq/Ack Pacing CommandsNormal Mode Modem Flow Control Commands Modem Baud Rate $MB Speed Conversion $BA Serial Port Baud Rate $SB Help Screens $H Immediate Action Commands Windows 95 Autodetect Inquiry Inquiry for Product Code Listing On-Line Diagnostics L8 Listing Current Operating Parameters L5 L7Listing S-Register Values L6 On-line diagnostics information On or Off Hook H Break Atcr Line Probe Commands Force Answer Mode aExiting Command Mode, Going Back On-Line O DF1 Format of Line Probe Graph or Table Commands DF0Immediate Action Line Probe Commands DP1 Rings Which Have Occurred Number of Rings Until Modem Answers Escape Code Character Return CharacterLine Feed Character Pause Time for Comma Time for Carrier Abort TimerBackspace Character Wait Time for Dial Tone Carrier Detect Response Time S10 Carrier Loss Disconnect Delay Time S13 Remote Configuration Escape Character S15 Callback Time DelayS11 Tone Dialing Tone Spacing and Duration S16 Callback Attempts S17 Changing Break TimeS18 Automatic Leased Line Restoral 336+ Only S19 Dial-Back Timer 336+ Only S24 PBX/CBX Disconnect Drop Time for DSR/CTS/CDS25 DTR Dropout Time S29 Local Inactivity Timer S26 Failed Password Attempts S32 Time Elapse for Escape Sequence S30 Inactivity Timer S36 Time Between DTR Inactive and Modem Off-Hook S37 Time Between DTR Active and Modem On-HookS48 Program V.34bis Connect Speeds Examples of Assigning Values Reading and Assigning S-Register Values AT Command and S-Register Summary Examples of Reading ValuesATS0=30S3?, and ATS7=55S7? Callback Feature Description Callback Security Remote Configuration Remote Configuration Description Callback Security and Remote Configuration To change your Remote Configuration feature status Error To set parity of the password/message prompt To turn your modems Callback Security feature on and off AT#CBN1xxxxxxxxxxCR AT#IxxxxxxxxxxCR xxxxxxxxxx from TableAT#DB2CRÊorÊAT#DB1CR AT#CBN0xxxxxxxxxxCR AT#SyyyyyyyyyyCR yyyyyyyyyy from Table Password Callback Operational Sequence Procedures Remote Configuration Operation Procedures StepProcedure Remote Configuration Procedures Remote Configuration and Callback Security AT Commands Assign Passwords for Callback Phone Numbers #CBNCallback Security Enable/Disable #DB Erase Callback Phone Number #RDNxx Change Login Password #IChange Setup Password #S Erase Callback Password #RCBNxx Callback Attempts S16 Remote Configuration/Callback Security S-RegistersRemote Configuration Character S13 Callback Time Delay S15 Local Inactivity Timer S29 Failed Password Attempts S26 Modem Testing Local Analog Loopback Test/V.54 Loop Modem Testing Digital Loopback Test local/manual Digital Loopback Test/V.54 Loop 2 Local/Manual 119 Digital Loopback Test remote/automatic Digital Loopback Test/V.54 Loop 2 Remote/Automatic Back-to-Back Test 122 Local Analog Loopback Test Synchronous Mode Synchronous Mode Testing Digital Loopback Test Local/Manual Synchronous Mode Digital Loopback Test Remote/Automatic Synchronous Mode 126 DIP-Switch Settings Series II Modem 336+ MD1640A PC Board DIP-Switch Option Settings 129 130 Switch #4 AS/400 Mode Synchronous Mode/Leased Line/Dial-Up 131 132 133 134 135 Speaker Volume Control Function Position Effect Recording Option Configurations AT vs. Series II Result Codes DIP Switches #13-16 None of the LEDs Light When the Modem Is On Possible Causes and Solutions Modem Does Not Respond to Commands 141 Modem Dials But Cannot Make a Connection 143 Modem Disconnects While On-line Modem Cannot Connect When Answering Am Losing Data File Transfer Is Slower Than It Should Be Am Getting Garbage Characters on the Monitor Modem Model No Contacting Black Box Recording Modem Information Shipping and Packaging Making the Call Upgrading the Series II Modem’s Firmware Appendix B Dial Pulse and Tone-Dial Frequencies Dial PulsesTone Dial Frequencies 697 770 852 941 1209 Digits 1336 1633 $An Appendix C Command SummaryCommand Description DsNd BSn$BAn CDn DFn DPn$Dn $FCn $En$EBn #Fn $Hn Command Values Description #Ln $MBnNdNe #Pn $RnRFn $SPn Sr=n$SBn SFn $VDn #Tn #Xn 160 + Dxxxxxx???Nxx Callback Security/Remote Configuration Command SummaryCommand Description #DBn #CBNyyxxxxxx Password Command Summary 25bis Commands Appendix D DIP-Switch Summary Asynchronous ModeDIP-Switch Condition Effect Synchronous Mode 166 Appendix E S-Register Summary Appendix E S-Register Summary S15 S13 S24 S36 Appendix F Result Code Summary EffectDigit Words 172 Appendix F Result Code Summary Appendix G V.25bis Operation Delayed and Forbidden Numbers 25bis Operation Appendix G V.25bis Operation 25bis Set-Up and Initialization 25bis DIP-Switches 25bis Mode AT Commands 25bis Responses Result Codes 25bis AT Commands Change Serial Baud Rate CSP Command Enable/Disable V.25bis Mode $V Command Dial Phone Number Provided CRN Command Listing Delayed Phone Numbers RLD Command Listing Forbidden Phone Number RLF CommandDisregard or Connect to Incoming Calls DIC or CIC Command DTR Dialing $D Command Italy ITU V.25bis Country Specific Information Austria Belgium France Singapore Appendix H Series II Modem Cables Appendix H Series II modem cables 188 Appendix I RS232C Interface Specifications Appendix I RS232C Interface Specifications Direction from modem Received Data Pin 3, RD BBRequest To Send Pin 4, RTS CA Direction to modem Data Carrier Detect Pin 8, CD CF Signal Ground Pin 7, SG ABClear To Send Pin 5, CTS CB Data Set Ready Pin 6, DSR CC Transmit Clock Pin 15, TC DB Receive Clock Pin 17, RC DDData Terminal Ready Pin 20, TR or DTR CD Ring Indicator Pin 22, RI CE Terminal Busy Out of Service Pin 25, OOSExternal Transmit Clock Pin 24, XTC FCC and IC EMI/RFI Statements Appendix J Regulatory Information FCC Part 68 Regulations for Telephone-Line Interconnection Appendix J Regulatory Information 196 197 Canadian Limitations Notice Copyright 2000. Black Box Corporation. All rights reserved