Mn
(2,1)
=0;
Speaker always OFF.
=1;
Speaker ON until carrier is detected.
=2;
Speaker always ON.
=3;
Speaker ON after last digit is dialed out until carrier detected.
*En
(0)
=0;
Maintain non-error control connection when error control
handshake fails.
=1;
Drop connection when error control handshake fails.
S22
Reserved.
S23
Bit-mapped register, default = 105
Qn
(7)
=0;
Modem returns result code.
=1;
Modem does not return result code. (See also S40b1)
Vn
(6)
=0;
Display result code in numeric format. (See S35b7)
=1;
Display result code in verbose format.
Xn
(5,4,3) =0;
Basic result code (0-4). (See result code table for ATXn)
=1;
Result code (0-5, 10-21).
=2;
Result code (0-6, 10-21).
=3;
Result code (0-5, 7-21).
=4;
Result code (0-21).
=5;
Error control result code enabled.
=6;
Error control result code enabled.
=7;
Error control result code enabled.
&Pn
(2)
=0;
Pulse dial make/break ratio=39%/61%.
=1;
Pulse dial make/break ratio=33%/67%.
T
(1)
=0;
Tone dial.
P
=1;
Pulse dial.
En
(0)
=0;
Command echo disabled.
=1;
Command echo enabled.
S24
Bit-mapped register, default = 138
Ln
(7,6,5) =0-7;
Speaker volume control.
Nn
(3,2,1) =0-7;
Ring volume control.
S25
Reserved.
S26
RTS/CTS Delay, default = 0
Sets the delay, in 10 millisecond units, between RTS and modem's CTS response in
synchronous mode. (See &Rn)
S27
Bit-mapped register, default = 156
*Qn
(7,6)
=0;
No response to poor signal quality.
=1;
Initiate retrain to poor signal quality. (See also S41b2)
=2;
Adaptive rate (auto fall-back and fall-forward) when signal
quality changes.
=3;
Disconnect when signal quality is poor.
&Hn
(5,4,3) =0;
Flow control disabled.
=1;
Reserved.
=2;
Reserved.
=3;
Hardware CTS/RTS flow control.
=4;
Software XON/XOFF flow control.
=5;
Reserved.
&Kn
(2,1,0) =0;
No error control.
=1;
MNP4 (includes MNP3, see also S41b0).
