Multi-Tech Systems MT3334SMI manual Flow Control, Result Codes, Sample Sessions

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Chapter 3 - Class 1 Fax Commands

Flow Control

XON/XOFF flow control is used by the ModemModule to match the PC-to-modem data rate to the line signaling rate. XON/XOFF flow control is mandatory and RTS/CTS flow control is optional per the Class 1 standard. There is currently no Class 1 command for setting the flow control method, and no means to read the current flow control method in use. The PC is responsible for matching the modem's default flow control method.

Result Codes

Your Class 1 ModemModule can respond with the basic set of result codes (OK, CONNECT, NO CARRIER, and ERROR) with only minor differences in meaning for fax mode.

If the modem detects a data carrier or tone other than that specified by the +FRM or +FRH command, it sends a CONNECT ERROR (+FCERROR) result code to the PC, then returns to Command mode. This will allow the PC to recover by reconfiguring the modem to define the unexpected signal. The CONNECT ERROR message has the formats +FCERROR (verbose) or +F4 (terse).

Sample Sessions

This section provides Class 1 Fax send and receive handshaking examples.

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Contents Data/Fax Socketed Modem Model MT3334SMI Evaluation KitPatents Revision DescriptionContents Index Introduction and Description Introduction FeaturesProduct Description ModemModule Developer’s GuideIntroduction and Description Technical Specifications1200 bps MT3334SMI Physical Dimensions Physical DimensionsDS1 Test/Demo Board SpecificationsLED1-LED4 MT3334SMI Test/Demo Board Block Diagram Test/Demo Board Block DiagramMT3334SMI Pinout MT3334SMI Pin-outTypical Application Hardware Considerations MT3334SMI Design ConsiderationsCalculating Z for Tip and Ring Traces PC Board Layout ConsiderationsRecommended Transceiver Key MT3334SMI PlacementQty Name Description FCC Part Telecom Labeling RequirementsIndustry Canada CS-03 ReregistrationMultiple Listing AT Commands, S-Registers, and Result Codes Answer Repeat Last CommandAT Commands, S-Registers, and Result Codes Monitor Speaker Mode Monitor Speaker VolumeReturn Online to Data Mode Result Codes Enable/DisableSr? Read Register Value Modem ResetTone Dialing Result Code FormatAsynchronous Communications Mode Command &Fn Load Factory SettingsDisplay Current Settings Store Current Configuration\An Select Maximum MNP Block Size Command &Zy=x Store Dialing Command\Bn Transmit Break \Jn Data Buffer Control\Tn Inactivity Timer \Nn Error Correction Mode Selection\Qn Flow Control Selection \Vn Protocol Result CodeCommand %En Fallback and Fall Forward Control Command %DCn AT Command ControlCommand +ES=n Enable Synchronous Buffered Mode Enter Setup PasswordRegisters Register Unit Range Default DescriptionS43 Terse Verbose Description Result CodesClass 1 Fax Commands Command Description Class 1 Fax Command SummaryCommand Class 1 Fax Commands Fax MOD Modulation Parameter ValuesFunction Display Current Class Values Default Data modem Result Code MeaningFunction Select Service Class Values Default Data mode ModemModule Developer’s Guide CommandFunction +FRS=? Enter Class 1 Fax Commands+FRM=? Enter Result Codes Flow ControlSample Sessions Action by Command Respone Local Modem Remote PC AT+FRH=3 No Carrier ModemModule Developer’s Guide Class 2 Fax Commands Class 2 Fax Commands EIA SP-2388 August Class 2 Fax Command Implementation+FAA +FAXERR+FCQ +FBOR+FCR Fax Capability Parameters +FDCC+FDCS Current Session ResultsData Compression Format Conversion +FDFFC+FDIS Current Session Parameters+FDT +FDR+FECM +FET+FLID +FK+FLNFC +FLPL+FRBC +FPTS+FREL +FSPL+FTSI +FHNGMT3334SMI Remote Configuration Setup Basic ProcedureChanging the Setup Password ModemModule User GuideChanging the Remote Escape Character Remote ConfigurationMT3334SMI Troubleshooting Local Analog Loopback Test V.54 Loop Test procedureRemote Digital Loopback Test V.54 Loop TroubleshootingLocal digital loopback test Local Digital Loopback Test V.54 LoopUpgrade Procedure Identify the Modem Firmware Upgrade OverviewIdentify the Current Firmware Version Multi-Tech Web SiteUpgrade Procedure Download the Upgrade FileMulti-Tech BBS Use FlashPro to Upgrade Modem Firmware Extract the Upgrade FilesRestore Your Parameters Clear Your Stored ParamentersAppendixes MT3334SMI International Modem Restrictions FCC FAX UpdateCanadian Limitations Notice AppendixesEuropean Directives User Guide Statement EMC, Safety and Terminal Directive ComplianceNew Zealand Telecom Warning Notice Introduction Appendix B Multi-Tech Flash Programming ProtocolProgramming the Modem Handshake SequenceOther programming concerns Other supported boot code commandsModemModule Developer’s Guide Program Sequence Data Record Intel Hex FormatXxxx End of File Record Extended Address RecordEeee Index IndexMT3334SM MT3334SMI MT3334SM