Appendix A AT Commands
57
The <max_rate> specifies the highest connections rate for the DCE.
Valid <max_rate> Range:
0
Determined by modulation selected in <carrier> (default).
300—57333 Value limited by modulation selected in <carrier>.
Valid <max_rate> for each <carrier>:
V34
2400 bits/s—33600 bits/s in steps of 2400 bits/s.
V32bis
4800 bits/s—19200 bits/s in steps of 2400 bits/s.
V32
4800 bits/s—14400 bits/s in steps of 2400 bits/s.
V22bis
2400 bits/s.
V22
2200 bits/s.
V23C, Bell212A
1200 bits/s.
V.21, Bell103
300 bits/s.
+MSC=<src_v34>—Seamless Rate Change Enable
Use this command to enable or disable V.34 seamless rate changes.
+MSC=0
Disables V.34 seamless rate change.
+MSC=1
Enables V.34 seamless rate change (default).
+PCW=<call_waiting>—Call Waiting Enable
Use this command to select how the modem responds to a call waiting signal.
The soft modems response is also dependent on the current setting of the
caller ID command,
+VCID
.
Valid <call_waiting> Values:
0
Enable the call waiting detector. When a call waiting signal is
detected, toggle V.24 circuit 125 and collect caller ID as set by
+VCID
(default).
1
Enable the call waiting detector. When a call waiting signal is
detected, hang up the current call.
2
Disable call waiting detector.
+PIG=<value>—PCM Upstream Ignore
Use this command to enable or disable PCM upstream in a V.92 connection.
+PIG=0
Enable PCM upstream.
+PIG=1
Disable PCM upstream (default).
