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
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