MTD2000 AT Command Guide R12
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14 Call Command
14.1 Originate Call – AT$CV
This command is used to initiate a voice call (normal or silent call). For normal call, the
device will start the two-way call session after call is connected. For silent call, the
device will start one-way call session by turning on the MIC and mute the speaker (no
ring back tone, no voice heard from the called party).
Note:
1. User can use event to trigger a call (e.g. press panic button or other means). Once
the call is initiated, the panic button is used to end the call. Thus pressing panic
button during call in progress will not trigger the event but end the call.
2. If the panic button is pressed while normal call is being established or in the midst of
active normal call, the device will end the call.
3. If the panic button is pressed while silent call is being established or in the midst of
active silent call, the device will not end the call. Only the called part (far end) can
end the silent call.
4. If the user is trying make call to a SMS number which is not defined, the device will
send out an unsolicited response to indicate undefined SMS number.
Syntax
Command
Response
AT$CV=<Index>,<Type>
Note: Write setting.
OK
Parameters
Index
Call number index 1 to 10 (corresponding to the SMS number in
$SL)
Type
Call type (0 – normal call, 1 – silent call)
Example
Command
Response
AT$CV=1,0
Note: Initiate a normal call.
OK
