Functional Modes, Command Mode | Multi-Tech Systems BL-Series

Chapter 5 - Command Mode

5.1.2Functional Modes

The MultiModem can be in one of two functional states (see Figure 5-1). These are "Command mode" and "On-line mode". (There is also an in-between state, "Wait-for-Carrier", where the modem is out of Command mode but not yet really On-Line.

When the modem is initially powered up, it is in Command mode and is ready to accept commands from your keyboard or software. The modem enters On-line mode after dialing, making a connection with another modem, and then detecting a valid carrier signal. If no carrier is detected within a certain time frame, the modem abandons the call and re-enters Command mode.

Once on line, the modem exits On-line mode if one of two conditions is met. If the carrier is lost or intentionally dropped, the modem hangs up and re-enters Command mode. Also, if the modem recognizes the Escape sequence for which it is configured (i.e., either the Escape characters in the serial data stream, the Remote Escape characters in the modulated data stream, or the Break signal), the modem will exit On-line mode, retain the datacomm link, and enter Command mode.

You can force the modem into On-line mode without dialing by sending the ATD or ATA command to the modem.

COMMAND +++AT

MODE


HANG						Dial (D or A) command,
UP						or incoming phone call




					WAIT FOR
					CARRIER
		No carrier
		No carrier				Carrier detected
		detected				Carrier detected
		detected

Carrier lost

ON-LINE			AT0 Command
ON-LINE			AT0 Command
MODE
MODE

Figure 5-1. Functional Modes

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Multi-Tech Systems BL-Series manual Functional Modes, Command Mode

Contents

User Guide Record of Revisions User Guide Contents Registers Command ModeCallback Security and Remote Configuration Manual Dial and Automatic Answer Appendixes Modem TestingDIP-Switch Settings Warranty, Service and Tech SupportPage Introduction and Description Introduction How To Use This Manual DIP-Switches AT Command Mode OperationCallback and Remote Configuration Testing Your Modem 1 2834 Series Features Modem Features2 1932 Series Features Fax Features 3 1432 Series Features Technical Specifications Introduction and Description Mode of OperationIntelligent Features Command Buffer Carrier Frequencies 300 bps Bell Standard Fax Carrier FrequenciesLease Line Restoral Carrier Frequencies Operating Temperature ConnectorsDiagnostics Indicators Modem LED Indicators PowerModels Only Controls on PC Board MultiModemBL User Guide Installation and Connection Unpacking MT2834BL shown What is in Your Modem Package? Safety Warnings InstallationInstallation Procedure MultiModemBL/BLI Connections MultiModemBLK Connections Cabling Procedure MT1432BLK and MT2834BLK Loading Trio DataFAX Software Installation and Connection Is Your Modem Ready for Use? Software Configuration and Modem Basics How Can You Identify Your Uart Type? Serial Port Limitations 16550 Uart and Windows Configuring Your SoftwareConfiguring Software for Your Modem Software Configuration PC Initialization Strings Changing Default ParametersOther Parameters Terminal Emulation Configuring Software for Your ComputerConfiguring Software for the Remote System Macintosh Initialization AT &F S0=0 X4 &E14 M When to Disable Data CompressionDisabling Error Correction File Transfer Protocols Modem Basics Answer/Originate Voice/Data Toggle SwitchSimple Operations MultiModemBL User Guide Manual Dial and Automatic Answer Dialing/On-Line/Answering Manual Dial and Automatic Answer Manual Dial Backup Call TerminationDial Backup and Leased Line Restoral Automatic Leased Line Restoral Operation Manual Call Origination Dial-Up Operation Manual Answering Automatic Answering Handshaking Details Abort TimerCall Termination Command Mode AT Command Editing Functional Modes Command Mode Summary of AT Commands Flow Control Disabled Normal ModeAuto-Reliable Mode Reliable Mode Callback Security Enable/Disable Enable/Disable Reading Line Probe From DSP during handshakeDisplay of Signal Strength Information Passwords for Callback Phone Numbers Multi-Tech Result Codes Series Result Codes MultiModemBL User Guide Standard AT Result Codes Series Dialing a Stored Number N Dialing Commands Dialing Action CommandsDial Command D Continuous Redial not used in BLI/BLK a or Set Pulse Dial Ratios &P Not used in BLK Dial Modifier CommandsVoice/Data Dialing $VD Pulse or Tone Dial P T Long Space Disconnect Y Return to Command Mode After Dial Command ExecutionReverse the Mode of Operation R Automatic Pauses in Dialing Quiet Answer @ Calling Card Detect Tones $ Listing Numbers Stored in Memory L Phone Number Memory CommandsStoring Phone Numbers D...N Number Linking NN Loading Factory Defaults &F Configuration and Default Storage CommandsModem Reset Z Unix Uucp Spoofing $SP Async/Sync Mode Switching &MSynchronous Transmit Clock Select &X Result Codes Multi-Tech or Standard AT &Q 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 Bell/V.21 Tone Not Used in BLK Models B Phone Line Conditioning CommandsEnable/Disable Trelis Coded Modulation #T Guard Tones Not Used in BLI or BLK Models &G Enable/Disable Lowspeed Fast Connect $FC 2834 Series only Fallback Modes When On-Line #FCleardown at Disconnect &CD 2834 Series only Auto Speed Detect #A CTS Control &R 7 RS-232C Interface Control CommandsCarrier Detect Control &C Data Terminal Ready Control &D CTS/RTS Interaction Control &RF Data Set Ready Control &SDSR/CD Interaction Control &SF Reliable Mode &E2 Error Correction CommandsNormal Mode &E0 Auto-Reliable Mode &E1 Auto-Reliable Buffering $A Mode Select #LOriginate Mode Answer Mode Error Correction/300bps $E Enable/Disable Auto Reliable Fallback Character $FRetransmit Count $R Modem-Initiated Flow Control Flow Control CommandsHardware Flow Control &E4 Xon/Xoff Flow Control &E5 Send Xon/Xoff Characters #X Xon/Xoff Pass-Through &E7Hewlett-Packard ENQ/ACK Pacing &E9 Parity Selection #P Normal Mode Modem Flow Control On &E11Terminal/Computer Initiated Pacing &E13 Maximum Block Size &BS Xon/Xoff Pass-Through Commands Normal/Auto-Reliable/Reliable Mode CommandsEnq/Ack Pacing Commands Speed Conversion $BA Speed Conversion CommandsModem Baud Rate $MB Command Mode Series Serial Port Baud Rate $SB Immediate Action Commands Off Hook H Listing On-Line Diagnostics L8 Force Answer Mode a Line Probe Commands 2834 Series onlyExiting Command Mode, Going Back On-Line O MultiModemBL User Guide Registers Return Character Number of Rings Until Modem AnswersRings Which Have Occurred Escape Code Character Wait Time for Dial Tone Time for Carrier Abort TimerLine Feed Character Backspace Character S11 Tone Dialing Tone Spacing and Duration S10 Carrier Loss Disconnect Delay TimeS13 Remote Configuration Escape Character Carrier Detect Response Time S17 Changing Break Time S15 Callback Time DelayS19 Dial-Back Timer S16 Callback Attempts S25 DTR Dropout Time S26 Failed Password AttemptsS29 Local Inactivity Timer S24 PBX/CBX Disconnect Drop Time for DSR/CTS/CD S37 Time Between DTR Active and Modem On-Hook S30 Inactivity TimerS32 Time Elapse for Escape Sequence S36 Time Between DTR Inactive and Modem Off-Hook S48 Program V.34bis Connect Speeds 2834 Series only Examples of Assigning Values Reading and Assigning S-Register ValuesExamples of Reading Values AT Command and S-Register Summary Callback Security and Remote Configuration Callback Feature Description Callback Security and Remote Configuration Remote Configuration DescriptionTo change your Remote Configuration feature status AT#CBN0xxxxxxxxxxCR To set parity of the password/message promptAT#CBN1xxxxxxxxxxCR Callback Operational Sequence Procedures Remote Configuration Operation Procedures StepProcedure Remote Configuration Procedures Change Login Password Remote Configuration and Callback Security AT CommandsAssign Passwords for Callback Phone Numbers #CBN Callback Security Enable/Disable Erase Callback Phone Number #RDNxx Erase Callback Password Remote Configuration/Callback Security S-Registers MultiModemBL User Guide Modem Testing Introduction Local Analog Loopback Test/V.54 Loop Modem Testing 100 Digital Loopback Test/V.54 Loop 2 Local/Manual 101 Digital Loopback Test/V.54 Loop 2 Remote/Automatic 4A. Back-to-Back Test Cabling Back-to-Back Test Local Analog Loopback Test Synchronous Mode Synchronous Mode Testing Synchronous Mode Digital Loopback Test local/manual 104 Digital Loopback Test Local/Manual Synchronous Mode Synchronous Mode Digital Loopback Test remote/automatic 105 Digital Loopback Test Remote/Automatic Synchronous Mode MultiModemBL User Guide 106 DIP-Switch Settings PC Board BL models 108 DIP-Switch Settings DIP-Switch Option Settings109 1432 Series Switch #4 AS/400 Mode Synchronous Mode/Leased Line/Dial-UP110 111 112 113 MultiModemBL User Guide Series Speaker Volume Control114 Switch Function Position Effect Recording Option Configurations115 DIP Switches #15-16 DIP Switches #13-14116 Warranty, Service and Tech Support On-line Warranty Registration Limited Warranty118 Recording Modem Information ServiceWarranty, Service and Tech Support Tech Support To log on to the Multi-Tech BBS Multi-Tech BBSTo Download a file About Multi-Tech’s Internet Presence Using FlashPro to Upgrade Modem FirmwareAbout the Multi-Tech Fax-Back Service Upgrading the MultiModem SupplyNet Online Ordering Instructions About Ordering Accessories122 Appendixes 124 Appendix a TroubleshootingNone of the LEDs Light When the Modem Is On Modem Does Not Respond to Commands 125 Appendix a Troubleshooting 126 Modem Dials But Cannot Make a Connection 127 Modem Cannot Connect When AnsweringModem Disconnects While On-line File Transfer Is Slower Than It Should Be Am Getting Garbage Characters on the Monitor Am Losing Data128 129 Appendix B Ascii Conversion Chart 130 Appendix C Dial Pulse and Tone-Dial FrequenciesDial Pulses Tone Dial Frequencies #An Appendix D AT Command SummaryCommand Values Description $An SN d BS n$BA n CD n $Fn $EBn#Fn $FCn $MBn $HnL10 #Ln Sr=n NdNe$Rn RFn #Tn $SBnSFn $SPn +++ATCR #Xn137 Callback Security/Remote Configuration Command Summary 25bis Commands Password Command Summary Asynchronous Mode Appendix E DIP-Switch Summary140 Appendix E DIP-Switch Summary Synchronous Mode141 142 Appendix F S-Register Summary S29 S24S25 S26 145 Appendix G Result Code SummaryAppendix G Result Code Summary Terse Digit Verbose Words Effect 146 Appendix H V.25bis Operation Delayed and Forbidden NumbersAppendix H V.25bis Operation 25bis Operation 25bis Set-Up and Initialization 25bis DIP-Switches148 25bis Responses Result Codes 25bis Mode AT Commands149 Dial Phone Number Provided CRN Command 25bis AT CommandsEnable/Disable V.25bis Mode $V Command Change Serial Baud Rate CSP Command DTR Dialing $D Command Listing Delayed Phone Numbers RLD CommandListing Forbidden Phone Number RLF Command Disregard or Connect to Incoming Calls DIC or CIC Command Austria ITU V.25bis Country Specific InformationItaly Switzerland 153 Appendix H V.25bis Operation FranceBelgium Singapore Figure I-1. RS232 Cable IBM PC Appendix I MultiModemBL Cables Figure I-4. MAC Cable 155 Appendix J RS-232C Interface Specifications 156 Appendix J RS-232C Interface SpecificationsSignal Function Assignment Circuit Source Pin Designation Eia Clear To Send Pin 5, CTS CB Signal Ground Pin 7, SG ABReceived Data Pin 3, RD BB Request To Send Pin 4, RTS CA Receive Clock Pin 17, RC DD Ring Indicator Pin 22, RI CETest Voltage Pin 9 Transmit Clock Pin 15, TC DB External Transmit Clock Pin 24, XTC Terminal Busy Out of Service Pin 25, OOS159 160 Appendix K Regulatory Information EMC, Safety and Terminal Directive ComplianceCompliance with European Community Requirements European Directives User Guide Statement New Zealand Telecom Warning Notice International Modem Restrictions162 163 FCC Regulations for Telephone Line Interconnection Industry Canada Canadian Limitations NoticeClass a Statement FCC Part 165 Index 166 Functional Description of RS232C SIG 167 XON/XOFF 168