AT Command Set
Preliminary
24
Order No. DM336P-002-01
Version : DM336P-AT-P04
2 Modem hangs up after ON-to-OFF DTR
transition (&D2) – default.
3 Modem resets after ON-to-OFF DTR
transition (&D3).
5 = 0 CD signal always on (&C0).
1 CD signal on when a remote carrier signal is
present (&C1) – default.
6 = x Undefined.
7 = 0 Long space disconnect turned off (Y0) –
default.
1 Long space disconnect turned on (Y1).
Register
S22
: Bit-mapped Register
Bit-mapped register S22 lets you control internal speaker and the modem responses.
Bit
Function
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0,1= 0
Speaker volume off (L0).
1
Low speaker volume (L1).
2
Medium speaker volume (L2) – default.
3
Loud speaker volume (L3).
2,3= 0
Speaker off (M0).
1
Speaker on until carrier detected (M1) –
default.
2
Speaker always on (M2).
3
Speaker on until carrier detected but off
during dialing (M3).
4,5,6=0 Hayes™ Smartmodem compatibility (X0).
4 Include CONNECT XXX responses (X1).
5 Same as 4 plus dial tone detection (X2).
6 Same as 4 plus BUSY response and blind
dialing (X3).
7 Same as 6 plus dial tone detection (X4) –
default.
7 = 0 US make/break ratio (&P0) – default.
1 UK and Hong Kong make/break ratio (&P1).
Register
S23
: Bit-mapped Register.
Bit
Function
1,2,3= 0 Use 0-300bps DTE data rate.
2 Use 1200bps DTE data rate.
3 Use 2400bps DTE data rate.
4 Use 4800bps DTE data rate.
5 Use 9600bps DTE data rate.
