9
O_
O0
Return to Data Mode
O1
Return to Data Mode and initiate an
equalizer retrain
P
Set Pulse dial as default
Q_
Q0
Modem sends responses
Q1
Modem does not send responses
Sr?
Read and display value in register r.
Sr=n
Set register r to value n (n = 0-255).
T
Set Tone Dial as default
V_
V0
Numeric responses
V1
Word responses
W_
W0
Report DTE speed only
W1
Report line speed, error correction
protocol, and DTE speed.
W2
Report DCE speed only
X_
X0
Hayes Smartmodem 300 compatible
responses/blind dialing
X1
Display connect message according to
AT\V, blind dial, and ignore busy tone.
X2
Same as X1 plus dial tone detection
X3
Same as X1 plus busy detection/blind
dialing
X4
All responses and dial tone and busy
signal detection
X5
Same as X4
X6
Same as X4
X7
Same as X0 plus dial tone and busy
signal detection
Y_
Y0
Modem does not send or respond to
break signals
Y1
Modem sends break signal for four
seconds before disconnecting
Z_
Z0
Reset and retrieve active profile 0
Z1
Reset and retrieve active profile 1
3.4 Extended AT Commands
&C_
&C0
Force Carrier Detect Signal High (ON)
&C1
Turn on CD when remote carrier is
present
&D_
&D0
Modem ignores the DTR signal
&D1
Modem returns to Command Mode after
