Commands, Yn Long Space Disconnect | Multi-Tech Systems MT3334HD8

MT3334HD8 User Guide

Yn Long Space Disconnect

n = 0 or 1 Default: Y0

When two modems are connected in reliable mode, a link disconnect request packet is sent to request a disconnect. In non-error correction mode, there is no “polite” way to request a disconnect. As a result, some “garbage” may be received when a hang-up command is issued.

Y0 disables the modem’s use of the break signal.

Y1 enables the modem’s use of the break signal, which shuts off the modem’s receiver and disconnects (both modems must have Y1 enabled).

V.34 Commands

The following commands apply only in V.34 mode.

%Fn Echo Canceler Frequency Offset Compensation

n = 0 or 1 Default: %F0

The %F command enables and disables echo canceler frequency offset compensation which, when enabled, can decrease modem performance.

%F0 disables echo canceler frequency offset compensation.

%F1 enables echo canceler frequency offset compensation.

&RAn Asymmetric Bit Rate

n = 0 or 1 Default: &RA0

The &RA command enables or disables asymmetric bit rate operation in V.34 mode. The asymmetric bit rate feature lets the modem transmit at one rate while receiving at a different rate.

&RA0 enables asymmetric bit rate operation.

&RA1 disables asymmetric bit rate operation.

28	CommPlete Communications Server

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Multi-Tech Systems MT3334HD8 manual Commands, Yn Long Space Disconnect, Fn Echo Canceler Frequency Offset Compensation

Contents

MT3334HD8 Modem User Guide Multi-Tech Systems, Inc Woodale Drive Mounds View, Minnesota CommPlete Communications Server FCC Fax Warning Canadian Limitations Notice Table of Contents Appendix D Testing the MT3334HD8Warranty, Service, and Technical Support Appendix F Introduction Introduction LED IndicatorsPower Supplies Manual Organization Installation Technical Specifications Data Rates Modem Introduction 2400 & 1200 bps MT3334HD8 User Guide Power Installation Safety Warnings MT3334HD8 modem card Pre-Installation Notes Installation ProcedurePage AT Commands Command Structure Working with AT CommandsModes of Operation Command Editing AT Commands by Function $BA Ds Dial Dialing CommandsDial Modifier Commands Continuous Redial Pulse or Tone Dialing Wait for New Dial Tone Dialing Pause Rn Reverse Originate/Answer ModeReturn to Command Mode After Dialing Flash On-Hook Call Card Tone Detect Phone Number Memory Commands@ Quiet Answer DsNd Store a Phone Number NdNe Number Linking Configuration Storage and Recall CommandsWn Store Configuration List Stored Telephone Numbers Fn Load Default Configuration Modem Response Result Code CommandsReset Modem Echo Command Mode Characters Result Codes Verbose/Terse #An Auto Speed Detection Online Connection CommandsAn Answerback Bn Answer Tone CDn Cleardown at Disconnect DCn AT Command ControlDTn Dtmf Detection Hn Busy-Out After Disconnect #Fn Fallback ModesGn Guard Tones Pn Set Pulse-Dial Ratios $Tn Calling Tone RDn Square Wave Ring Detect#Tn Trellis-Coded Modulation Yn Long Space Disconnect CommandsFn Echo Canceler Frequency Offset Compensation RAn Asymmetric Bit Rate Cn Carrier Detect Control RS-232 Interface CommandsDn Data Terminal Ready Control RFn CTS/RTS Interaction Control Rn Clear to Send ControlSn Data Set Ready Control SFn DSR/CD Interaction Control #Ln V.42 Error Correction Modes Error Correction and Data Compression CommandsEn Error Correction Modes En Data Compression $Fn Auto-Reliable Fallback Character Enable/Disable $En V.42 Error Correction at 300 bps$An Auto-Reliable Buffering $BAn Baud Adjust Speed Conversion Commands$Rn Retransmit Count $MBn Modem Baud Rate $SBn Serial Port Baud Rate Inquire Product Code Immediate Action CommandsRepeat Last Command L5, L7 List Current Operating Parameters Flow Control Commands E4 Hardware Flow Control E3 Flow Control DisableEn Non-Error Correction Mode Flow Control E5 XON/XOFF Flow Control En Pacing Computer-Initiated Flow Control #Xn Number of Xoff Characters Sent +++ATCR In-Band Escape Sequence Force Answer ModeEscape Sequences Breakatcr Out-of-Band Escape Sequence #Ixxxxxx Change Login Password Remote Configuration CommandsAtcr Remote Configuration Escape Sequence Go Back Online DPn Read Line Probe Data Line Probe Commands#Syyyyyy Change Setup Password DFn Format Line Probe Data RP Immediate Line Probe Diagnostic CommandsTn Respond to Remote Digital Loopback Signal Ln Display Line Probe Data Un Loopback Test Modes MT3334HD8 User Guide Registers S1 Ring Count RegistersS0 Number of Rings Until Modem Answers S2 Escape Code Character S5 Backspace Character S7 Time for Carrier Abort TimerS4 Line Feed Character S6 Wait Time for Dial Tone S9 Carrier Detect Response Time S10 Carrier Loss Disconnect Delay TimeS13 Remote Configuration Escape Character S11 Tone Dialing Spacing and Duration S24 PBX/CBX Disconnect Drop Time for DSR/CTS/CD S30 Inactivity TimerS34 Command Buffer Length After Online Escape Sequence S25 DTR Dropout Time S43 Force V.34 Connect Speed S94 Out-of-Service TimeS37 DTR Busy-In Time S48 Maximum V.34 Connect Speed Examples of Assigning Values AT Commands that Affect S-RegistersReading and Assigning S-Register Values Examples of Reading Values AT&E2$SP1#L3$R0$MB19200$SB115200$EB1S0=10&W0CR Testing the MT3334HD8 Test procedure Local Analog Loopback Test V.54 Loop Testing the MT3334HD8 Remote Digital Loopback Test V.54 Loop Dial the remote modem and establish your online connection Local Digital Loopback Test V.54 Loop Local digital loopback testPage Warranty, Service, and Technical Support Limited Warranty Service Technical Support Recording Product Information Logging onto the Multi-Tech BBS Multi-Tech BBSDownloading a File Leaving a Message About CompuServeReading a Message Bulletins About the Multi-Tech Fax-Back Service About the Internet Using FlashPro to Upgrade Firmware Upgrading the MT3334HD8 Firmware MT3334HD8 User Guide Appendixes Appendix a Ascii Conversion Chart Ctrl Code HEX DEC Dial Pulses Appendix B Dial Pulses and TonesTone Dial Frequencies Figure B-2. Standard Dtmf frequencies Appendix C Result Code Summary Multi-Tech Result Codes &Q0 Standard AT Result Codes &Q1 Register Unit Range Default Description Appendix D S-Register Summary Sets fixed V.34 connect speed = 28800 bps Appendix E AT Command Summary Return CDn AT Command Summary $Fn Command Values Description Command Values Description $MBn RAn Command Values Description SFn Command Values Description #Vn Breakatcr Basic Procedure Appendix F Remote ConfigurationSetup Changing the Passwords Changing the Remote Escape Character Index MT3334HD8 User Guide Index Long space break Pacing, 36, 37, 38 enable/disable, 38 ENQ/ACK Commands Loopback tests, 42, 43, 54, 56 tone detection