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Modem Reference Information
Reference Guide 91
Conexant AT Commands (Advanced Users Only)
Command (Conexant)
Mn Activate speaker: 0=off, 1=on during handshaking and off when receiving carrier (default), 2=always
on, 3=off when dialing and receiving carrier, on when answering.
N0 or N1 Included for compatibility only; returns result code.
On 0=go on-line, 1=go on-line and initiate retrain sequence.
P Force pulse dialing.
Qn 0=enable result codes to DTE (default), 1=disable.
Sn Select S-register n as default.
Sn=v Set default S-register n to value v.
T Force DTMF dialing.
Vn Report result codes: 0=short form (terse), 1=long form (verbose) (default).
W0 Report DTE speed (default).
W1 Report line speed, error correction protocol, and DTE speed.
W2 Report DCE speed.
W3 Report DCE speed and error correction protocol.
X0 Report CONNECT result code on connecting. Dial tone and busy detection not reported.
X1 Report CONNECT <text> result code on connecting. Dial tone and busy detection not reported.
X2 Report CONNECT <text> result code on connecting. Dial tone and busy detection not reported.
X3 Report CONNECT <text> result code on connecting. Dial tone not reported, busy signal reported if
detected.
X4 Report CONNECT <text> result code on connecting. Dial tone and busy signal reported if detected
(default).
Z Reset to default configuration.
+DR: a Select error control protocol: NONE=no data compression, V42B=42bis in both directions,
ALT=MNP 5 compression.
+DR=n 0=disables extended format "+DR:" intermediate result code, 1=enables.
+DS=a,b,c,d Controls V.42bis data compression function (b, c, and d are optional):
a sets direction(s) of data compression function, seen by DTE: 0=negotiated, no compression;
3=both directions (default).
b=0 specifies modem does not disconnect if V.42bis is not negotiated by remote modem as
specified by a.
c sets maximum number of dictionary entries (2048) that should be negotiated.
d sets maximum string length (32 bytes) to be negotiated.
+DS44=a,b,c,d,
e,f,g,h,i
Controls V.44 data compression function (b, c, d, e, f, g, h, and i are optional):
a sets direction(s) of data compression function, seen by DTE: 0=negotiated, no compression;
1=transmit only; 2=receive only; 3=both directions (default).
b specifies whether modem disconnects if V.44 not negotiated remote DCE as specified in a:0=do
not disconnect (default), 1=disconnect.
c: 0=stream method (default), 1=packet method, 2=multi=packet method.
d (256 to 2048) sets maximum codewords to be negotiated in transmit direction (default=2048).
e (256 to 2048) sets maximum codewords to be negotiated in receive direction (default=2048).
f (32 to 255) sets maximum string length to be negotiated in transmit direction (default=32).
g (32 to 255) sets maximum string length to be negotiated in receive direction (default=32).
h (2048 to 4096) sets maximum size of history buffer to be negotiated in transmit direction
(default=4096).
i (2048 to 4096) sets maximum size of history buffer to be negotiated in receive direction
(default=4096).