Reference Information
Modem Reference Information
92 Reference Guide
Conexant AT Commands (Advanced Users Only)
Command Function (Conexant)
+ESA=a,b,c,d,e,
f,g,h
Controls operation of synchronous access mode:
a=0 specifies in transparent sub-mode, modem transmits 8-bit SYN sequence on idle.
b=0 specified in framed sub-mode, modem transmits HDLC flags on idle (default and fixed).
c=0 specifies in framed sub-mode, modem transmits abort on underrun in middle of frame
(default); c=1 specifies in framed sub-mode, modem transmits flag on underrun in middle of
frame, notifies DTE.
d: not to be commanded.
e=0 specifies CRC generation and checking disabled (default and fixed).
f=0 specifies NZRI encoding and decoding disabled (default and fixed).
g=255 sets the octet value used in character-oriented framing.
h: not to be commanded.
+GCAP Transmit text listing commands that provide additional modem capabilities.
+GCI=n Set country of installation using 8-bit country code from Annex A of T.35.
+GMI Report modem manufacturer.
+GMM Report modem model.
+GMR Report modem version, revision, or date.
+GOI Transmit text identifying the device.
+GSN Report modem model serial number.
+IFC=n,m Set operation of local flow control between DTE and modem.
n =method DTE uses to control data flow from modem: 0=none, 1=XON/XOFF on transmitted
data, 2=Circuit 133 (Ready for Receiving) (default).
m =method modem uses to control data flow from DTE: 0=none, 1=XON/XOFF on received
data, 2=CTS/RTS (default).
+ILRR=n Report local port rate: 0=disable, 1=enable.
+IPR=n Set data rate at which the modem accepts commands when connected: 0 (allows operation
only at rates automatically detectable by modem), 2400, 4800, 9600, 19200, 38400, 57600, or
115200.
+ITF=a,b,c Sets transmit flow control thresholds (b and c are optional):
a (20 to 7000) sets threshold (octets) above which modem generates flow-off signal in
synchronous access mode (default=128).
b (10 to 5000) sets threshold (octets) below which modem generates flow-on signal in
synchronous access mode (default=64).
c=0 (fixed).
+PCW=n Set modem behavior with call waiting: 1=request modem-on-hold and collect caller ID
information, 2=hang up, 3=ignore call waiting.
+PIG=n 0=enable PCM upstream negotiation, 1=disable (default).
+PMH=n Set modem-on-hold: 0=enabled in V.92 mode (default), 1=disabled.
+PMHF Initiate flash hook sequence when in modem-on-hold procedure.
+PMHR=n Request modem to initiate or confirm modem-on-hold (MOH) procedure and timeout: 0=V.92
modem-on-hold request denied or unavailable, 1 to 13 grant MOH with timeout (1=10 sec,
2=20 sec, 3=30 sec, 4=40 sec, 5=1 min, 6=2 min, 7=3 min, 8=4 min, 9=6 min, 10=8 min, 11=12
min, 12=16 min, 13=indefinite).
+PMHT=n Set whether modem grants modem-on-hold (MOH) request, and MOH timeout: 0=deny V.92
modem-on-hold request (default), 1 to 13=grant MOH with timeout (1=10 sec, 2=20 sec, 3=30
sec, 4=40 sec, 5=1 min, 6=2 min, 7=3 min, 8=4 min, 9=6 min, 10=8 min, 11=12 min, 12=16
min, 13=indefinite).
+PQC=n Use Short Phase startup procedures: 0=enable V.92 Short Phase 1 and 2 (default), 1=enable
Short Phase 1 only, 3=disable.
+PSS=n 0=modems decide whether to use short startup procedures, 2=use full startup procedures on
all subsequent connections.
+VCID=n Set caller ID reporting: 0=disable (default), 1=enable with formatted presentation, 2=enable
with unformatted presentation.
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