Toshiba V.92 - Manual (Page 63)

63 AT Commands
AT command formats
5.375 x 8.375 ver 2.4.0
Result Codes:
Wn Result Code Option
Result Codes:
Xn Result code selection, call progress monitoring
This command sets detection options for dial tones and busy
signals, which is its primary function. However, it also
enables or disables extended result codes.
OK n=0,1
ERROR Otherwise
W0 CONNECT result code reports DTE speed.
Disable protocol result codes.
W1 CONNECT result code reports DTE speed.
Enable protocol result codes.
W2 CONNECT result code reports DCE speed.
Enable protocol result codes (default).
OK n=0,1,2
ERROR Otherwise
Command
Extended
Result code Dial tone
Detect Busy signal
Detect
X0 Disable Disable Disable
X1 Enable Disable Disable
X2 Enable Enable Disable
X3 Enable Disable Enable
X4
(default) Enable Enable Enable
X5 Enable Enable Enable