Multitech MT5634ZBA-USB manual Modem Port Flow Control, Data Buffer Control, Break Control

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	Chapter 4 - AT Commands, S-Registers and Result Codes

Command: \Gn	Modem Port Flow Control
Values:	n = 0
Default:	0
Description:\G0	Returns an OK for backward compatibility with some software.
\G1	Not supported—responds ERROR.
Command: \Jn	Data Buffer Control
Values:	n = 0
Default:	0
Description:\J0	Enable data buffer—serial port speed is independent of connect speed.
\J1	Disable data buffer—serial port speed is forced to the line speed.
Command: \Kn	Break Control
Values:	n = 0–5
Default:	5
Description:	Controls the response of the modem to a break received from the computer, the remote
	modem, or the \B command. The response is different for each of three different states.
	Data mode. The modem receives the break from the computer:
\K0	Enter online command mode, no break sent to the remote modem.
\K1	Clear data buffers and send break to the remote modem.
\K2	Same as \K0.
\K3	Send break immediately to the remote modem .
\K4	Same as \K0.
\K5	Send break to the remote modem in sequence with the transmitted data.
	Data mode. The modem receives the break from the remote modem:
\K0	Clear data buffers and send break to the computer.
\K1	Same as \K0.
\K2	Send break immediately to the computer.
\K3	Same as \K2.
\K4	Send break to the computer in sequence with the received data.
\K5	Same as \K4.
	Online command mode. The modem receives a \Bn command from the computer:
\K0	Clear data buffers and send break to the remote modem.
\K1	Same as \K0.
\K2	Send break immediately to the remote modem.
\K3	Same as \K2.
\K4	Send break to the remote modem in sequence with the transmitted data.
\K5	Same as \K4.
Command: \Nn	Error Correction Mode Selection
Values:	n = 0–5, or 7
Default:	3
Description:\N0	Non-error correction mode with data buffering (buffer mode; same as &Q6).
\N1	Direct mode.
\N2	MNP reliable mode. If the modem cannot make an MNP connection, it disconnects.
\N3	V.42/MNP auto-reliable mode. The modem attempts first to connect in V.42 error correc-
	tion mode, then in MNP mode, and finally in non-error-correction (buffer) mode with continued
	operation.
\N4	V.42 reliable mode. If the modem cannot make a V.42 connection, it disconnects.
\N5	V.42, MNP, or non-error correction (same as \N3).
\N7	V.42, MNP, or non-error correction (same as \N3).

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Contents User Guide Trademarks Record of RevisionsContents Index Introduction and Description Product Description IntroductionUniversal Serial Bus USB MT5634ZBA-USB User GuideIntroduction and Description What Is in Your Modem Package?MT5634ZBA-USB User Guide Quick Start What You Will Need Safety WarningsWe supply You supplyQuick Start Assemble the ModemInstall the Software Line Connection Connect the Modem to Your SystemPhone Connection USB ConnectionTest Your Modem Select the ModemFeatures Data FeaturesWhat Can You Do with Your Modem? Required Equipment FaxComputer Telephone LineConnecting to the Telephone Line Line Connecting to the Computer USBConnecting to a Telephone Set Phone ConnectionsFront panel Front PanelMT5634ZBA-USB User Guide AT Commands, S-Registers and Result Codes AT Commands AT Command Summary Echo Command Mode Characters Command DS=n Dial Stored Telephone NumberMonitor Speaker Volume Echo Online Data CharactersReturn Online to Data Mode Monitor Speaker ModeResult Codes Enable/Disable Command Sr=n Set Register Value Command Xn Result Code Selection MT5634ZBA-USB User Guide Command Vn Result Code Format Command Yn Long Space Disconnect Modem ResetCommand &Gn V.22bis Guard Tone Control Load Factory SettingsCommunications Mode Asynchronous Communications ModeDisplay Current Settings MT5634ZBA-USB User Guide Command &Tn V.54 Test CommandsCommand &Wn Store Current Configuration Select Stored Configuration for Hard ResetModem Port Flow Control Error Correction Mode SelectionData Buffer Control Break ControlCommand %Cn Data Compression Control Inactivity TimerCommand %DCnAT Command Control Protocol Result CodeEnter Setup Password Command %En Fallback and Fall Forward ControlCommand #S=x Store Setup Password Command%%%ATCRRemote Configuration Escape SequenceRegisters Rates K56flex Rates S37S38 S43 S42S48 S89Terse Verbose Description Result CodesMT5634ZBA-USB User Guide Remote Configuration Changing the Setup Password Basic ProcedureSetup Changing the Remote Escape Character Remote ConfigurationMT5634ZBA-USB User Guide Troubleshooting Modem Does Not Respond to Commands None of the Indicators LightModem Dials But Cannot Connect TroubleshootingModem Disconnects While Online Modem Cannot Connect When AnsweringModem Doesn’t Work with Caller ID Fax and Data Software Can’t Run at the Same TimeAppendixes FCC Regulations for Telephone Line Interconnection Appendix a Regulatory ComplianceIndustry Canada Class B StatementFAX Branding Statement Canadian Limitations NoticeNew Zealand Telecom Warning Notice European DirectivesInternational Modem Restrictions Appendix B Technical Specifications Carrier Frequencies ConnectorsITU-T ITU-T V.32bis/V.32 Carrier FrequenciesIndicators DiagnosticsDimensions WeightIntroduction Appendix C Loopback TestsLocal Analog Loopback Test V.54 Loop Figure C-1. Local analog loopback test Test ProcedureAppendix C Loopback Tests Remote Digital Loopback Test V.54 LoopLocal Digital Loopback Test V.54 Loop Figure C-3. Local digital loopback test Test ProcedureLimited Warranty Appendix D Warranty, Service, and Technical SupportOnline Warranty Registration ServiceMulti-Tech BBS Technical SupportTo Log on to the Multi-Tech BBS To Download a FileAbout the Internet About the Multi-Tech Fax-Back ServiceIndex Index MT5634ZBA-USB User Guide