Received Data Pin 3, RD BB, Direction to modem | Black Box MD1641A

SERIES II INTELLIGENT DATA/FAX MODEMS

22	RI	CE	125	DCE	Ring Indicator
24	XTC	DA	113	DTE	External Transmit Clock
25	OOS	CN	142	DTE	Terminal Busy

**Pin 9 need not be present in your RS232C cable

***Pins 15 and 17 are necessary only for synchronous operation

****Also known as DTR (Data Terminal Ready)

The computer or terminal should be supplied with a cable terminated with a Cinch DB25P (or equivalent) connector mounted in a Cinch DB51226-1 (or equivalent) hood assembly as specified by the EIA RS232C standard.

Functional Description of RS232C Signals:

Transmitted Data - Pin 2, SD (BA)

Direction: to modem

Signals on this circuit are generated by the customer's terminal and transferred to the transmitter of the Series II Modem. A positive signal is a space (binary 0) and a negative signal is a mark (binary 1). The transmitting terminal should hold this line in the marking state when no data is being transmitted, including intervals between characters or words. The TRANSMIT (XMT) LED indicates the status of this circuit.

Received Data - Pin 3, RD (BB)

Direction: from modem

The lead is the data output of the modem. Data signals received from the remote modem are presented on this line. When no carrier signal is being received (pin 8 negative), this line will be forced into a marking condition. The RECEIVE (RCV) LED indicates the status of this signal.

Request To Send - Pin 4, RTS (CA)

Direction: to modem

The RTS signal indicates to the modem that the computer or terminal has data that it wants to transmit.

190

Image 191

Black Box MD1641A Received Data Pin 3, RD BB, Request To Send Pin 4, RTS CA, Direction to modem, Direction from modem

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 Registers Callback Security and Remote ConfigurationModem Testing Other Appendixes DIP-Switch SettingsAppendix a Troubleshooting Introduction and Description Introduction How To Use This Manual Manual Dial and Automatic Answer Installation and ConnectionSoftware Configuration AT Command Mode Operation DIP-Switches Callback and Remote ConfigurationTesting Your Modem 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 AT &F S0=0 X4 &E0 M Disabling Error CorrectionAT &F S0=0 X4 &E14 M Dialing/On-Line/Answering Manual Dial and Automatic Answer Series II Intelligent DATA/FAX Modems Automatic Leased Line Restoral Operation 336+ Only Manual Dial Backup Call Termination 336+ OnlyDial Backup and Leased Line Restoral 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 Continuous Redial a or Dialing Commands Dialing Action CommandsDial Command D DTR Dialing $D Dialing a Stored Number N Pulse or Tone Dial P or T Dial Modifier CommandsVoice/Data Dialing $VD Long Space Disconnect Y Set Pulse Dial Ratios &PAutomatic Pauses in Dialing Wait for New Dial-Tone W Return to Command Mode after Dial Command ExecutionReverse the Mode of Operation R 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 Unix Uucp Spoofing $SP Modem Reset Z32terbo Enable/Disable #V 336 Only 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 Cleardown at Disconnect &CD Fallback Modes When On-Line #FEnable/Disable Lowspeed Fast Connect $FC 336+ Only Carrier Detect Control &C 7 RS232C Interface Control CommandsAuto Speed Detect #A 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 Hewlett-Packard ENQ/ACK Pacing &E9 Normal Mode Modem Flow Control On &E11Send Xon/Xoff Characters #X Maximum Block Size &BS Terminal/Computer Initiated Pacing &E13 Parity Selection #P Asynchronous Word Length Selection $EB 336 Only #X1 = #X0 = Normal Mode Modem Flow Control Commands Speed Conversion CommandsEnq/Ack Pacing 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 S-Register Values L6 Listing On-Line Diagnostics L8Listing Current Operating Parameters L5 L7 On-line diagnostics information On or Off Hook H Break Atcr Exiting Command Mode, Going Back On-Line O Line Probe CommandsForce Answer Mode a 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 Line Feed Character Escape Code CharacterReturn 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 S11 Tone Dialing Tone Spacing and Duration S13 Remote Configuration Escape CharacterS15 Callback Time Delay S18 Automatic Leased Line Restoral 336+ Only S16 Callback AttemptsS17 Changing Break Time S25 DTR Dropout Time S19 Dial-Back Timer 336+ OnlyS24 PBX/CBX Disconnect Drop Time for DSR/CTS/CD S29 Local Inactivity Timer S26 Failed Password Attempts S32 Time Elapse for Escape Sequence S30 Inactivity Timer S48 Program V.34bis Connect Speeds S36 Time Between DTR Inactive and Modem Off-HookS37 Time Between DTR Active and Modem On-Hook Examples of Assigning Values Reading and Assigning S-Register Values ATS0=30S3?, and ATS7=55S7? AT Command and S-Register SummaryExamples of Reading Values 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 Callback Security Enable/Disable #DB Remote Configuration and Callback Security AT CommandsAssign Passwords for Callback Phone Numbers #CBN 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 Tone Dial Frequencies 697 770 852 941 1209 Digits 1336 1633 Appendix B Dial Pulse and Tone-Dial FrequenciesDial Pulses $An Appendix C Command SummaryCommand Description DsNd BSn$BAn CDn $Dn DFnDPn $FCn $En$EBn #Fn $Hn Command Values Description NdNe #Ln$MBn RFn #Pn$Rn $SPn Sr=n$SBn SFn $VDn #Tn #Xn 160 + Dxxxxxx???Nxx Callback Security/Remote Configuration Command SummaryCommand Description #DBn #CBNyyxxxxxx Password Command Summary 25bis Commands DIP-Switch Condition Effect Appendix D DIP-Switch SummaryAsynchronous Mode Synchronous Mode 166 Appendix E S-Register Summary Appendix E S-Register Summary S15 S13 S24 S36 Digit Words Appendix F Result Code SummaryEffect 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 Disregard or Connect to Incoming Calls DIC or CIC Command Listing Delayed Phone Numbers RLD CommandListing Forbidden Phone Number RLF 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 Data Terminal Ready Pin 20, TR or DTR CD Transmit Clock Pin 15, TC DBReceive Clock Pin 17, RC DD External Transmit Clock Pin 24, XTC Ring Indicator Pin 22, RI CETerminal Busy Out of Service Pin 25, OOS 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