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Reference Information
Modem Reference Information
Command Function (Conexant)
+FMI Report modem manufacturer.
+FMM Report modem model.
+FMR Report modem version, revision, or date.
+FPR=n Set DTE/modem interface rate in bits/sec: 0=automatic detection (default).
+FRH=n Receive data with HDLC framing.
+FRM=n Receive data.
+FRS=n Receive silence, n×10 ms.
+FTH=n Transmit data with HDLC framing.
+FTM=n Transmit data.
+FTS=n Stop transmission and wait, n×10 ms.
Voice Commands
+FCLASS=8 Select voice mode.
+VDR=a,b Set report ring cadence and timing of RING event code:
a=0 disables ring cadence reporting, a=1 enables.
b sets report content: 0=DROF and DRON messages only.
+VDT=a,b Set report control tone cadence:
a=0 disables ring cadence reporting, a=1 enables.
b=0 reports CPOF and CPON messages only.
+VDX=a Select speakerphone half-duplex (a=0) or full duplex (a=1).
+VGM=n Set microphone gain of speakerphone function (0 to 255).
+VGR=n Set gain for received voice samples (0 to 255).
+VGS=n Set speaker gain of speakerphone function (0 to 255).
+VGT=n Set volume (120 to 135).
+VIP Initialize all voice parameters to defaults.
+VIT=n Set initial value for DTE/modem inactivity timer (0 to 255 seconds).
+VLS=n Select sources/destinations for analog data.
+VNH=n Set automatic hangups: 0=enable, 1=disable, 2=disable automatic hangups in non-voice modes.
+VPR=n Set DTE/modem interface rate (0=autobaud).
+VRA=n Set delay between ringbacks before modem assumes remote station is off hook (0 to 255 x 0.1 sec).
+VRN=n Set delay between ringbacks before modem assumes remote station is off hook (0 to 60 sec).
+VRXn Start voice reception: 0=start without periodic tone production, 1=start with periodic tone production.
+VSD=a,b Set silence detection sensitivity and required period of silence before modem reports silence at end of
voice receive.
+VSM=a,b,c,d Set voice and silence compression methods, and voice sampling rate.
+VSP=a Disable (a=0) or enable (a=1) speakerphone.
+VTD=n Set beep duration (1 to 500 x 0.01 sec).
+VTR Start voice transmission and reception.
+VTS=string Send voice tones.
+VTX Start voice transmission.
AT* Commands
*B Display black-listed numbers.
*D Display delayed numbers.
142 Reference Guide