AT Commands Modem Terminated
158
ATX
Call Progress Monitoring Control
AT&C
DCD Control
Description:
Defines if the dial-tone detection and busy-tone detection are to be used during a call.
Set command:
ATX
=[<speaker>] or
ATX
[<speaker>]
Read command:
ATX?
Displays the current <speaker> setting.
Test command:
ATX=?
Shows if the command is supported.
Test command
response:
X: (list of supported <speaker>s)
Parameter:
<speaker>:
<speaker>
Description
0
Busy and dial-tone detection off
No line speed reported on connection
1
Busy and dial-tone detection off
Report line speed on connection
2
Busy detection on and dial-tone detection off
Report line speed on connection
3
Busy detect off and dial-tone detection on
Report line speed on connection
4
Busy detection and dial-tone detection on
Report line speed on connection
Default setting
Description:
Determines the behaviour of the carrier detect.
Set command:
AT&C
[<value>]
Parameter:
<value>:
<value>
Description
0
DCD always on
1
DCD follows the connection
Default setting