[pjsip] Mute / Un-mute

Norman Franke norman at myasd.com
Wed Apr 9 17:11:22 EDT 2008

I haven't tested to determine if audio is still transmitted (although  
I've turned off VAD, so I assume it is.)

I've tried setting the volume to zero, which works. I've also  
disconnected the mic from the calls (using pjsua_conf_disconnect)  
which also works. Then I've disconnected the mic and added in a  
comfort noise generator of my own design. All of these will work. I  
don't like absolute silence because the other side often thinks they  
were disconnected.

I'm not sure, but if there is no audio, VAD (silence detection)  
should kick in and not transmit audio, if I understand it correctly.

Norman Franke
Answering Service for Directors, Inc.

On Apr 9, 2008, at 4:06 PM, Mike Kluso wrote:

> Hi,
> I am trying to use the pjsua as an user agent in a SIP conferencing  
> scenario.
> I am wondering how to mute & un-mute the mic during a session.
> Is "pjsua_conf_adjust_tx_level(slot_number, 0 )" is the best way to  
> mute?
> What to do if I don't want to transmit audio at all in a session?
> Keep the mic level at zero though out?
> Thanks
> Mike
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