AT Commands Modem Terminated
151
ATO
Return To On-line Data Mode
ATP
Select Pulse Dialling
ATT
Select Tone Dialling
AT+CVHU
Voice Hang-up Control
Description:
Switch from on-line command mode to on-line data mode during an active call.
Returns ERROR when not in on-line command mode.
Execution command:
ATO
[<value>]
Parameter:
<value>:
<value>
Description
0
Return from on-line command state to on-line data state
Description:
This command would normally cause the next
command to use pulses when
dialling the number, but it is ignored and is implemented for compatibility reasons
only.
Execution command:
ATP
Test command:
ATP=?
Shows if the command is supported.
Description:
This command would normally cause the next
command to use tones when
dialling the number, but it is ignored and is implemented for compatibility reasons
only.
Execution command:
ATT
Test command:
ATT=?
Shows if the command is supported.
Description:
Selects whether
or “drop DTR” shall cause a voice connection to be disconnected
or not.
Set command:
AT+CVHU=
[<mode>]
Read command:
AT+CVHU?
Displays the current <mode> setting.
Test command:
AT+CVHU=?
Shows if the command is supported.
Test command
response:
+CVHU: (list of supported <mode>s)
Parameter:
<mode>:
<mode>
Description
0
“Drop DTR” is ignored but OK response given
ATH
disconnects the call
1
“Drop DTR” and
ATH
ignored but OK response given