Data-Over-Voice

Data-Over-Voice

An experimental feature to send and receive an identification over
voice channel.

If a party answers, the ID is transmitted some seconds afterwards.
The calling party listens 30 seconds after receiving an answer message
for the ID.

Add to your extension's settings file:

dov_ident  <id string without white spaces>
dov_log    /path/to/log/file
dov_type   pwm|pcm
dov_level  0|level

'pwm' survives analog transcoding.
'pcm' is fast and will almost not be recognised.
'level' can be used to alter default signal amplitude (100..30000).