It seems VAD would also be a potential problem with NAT and state full packet inspection on firewalls. It would see a better practice for the UA to send keep alive RTP packets. That would solve both dead call detection and potential NAT issues. That would be nice RFC change.<div>
In my situation I have never seen VAD in use. I would like to have the option to set what determines a call is dead, 1 leg no RTP, both legs no RTP, or don't kill a call no matter if there is no rtp.</div><div>Looking forward to the solution you are talking about.</div>
<div><br></div><div>Dave<br><div class="gmail_quote">On Fri, Dec 17, 2010 at 9:48 AM, Razvan Crainea <span dir="ltr"><<a href="mailto:razvancrainea@opensips.org">razvancrainea@opensips.org</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
Hi Saul,<br>
<br>
Unfortunately this solution doesn't deal with the UA using VAD in case there are no RTP packages sent when voice is suppressed. Anyway, we are working on a solution that will solve this problem.<br>
<br>
Regards,<div class="im"><br>
<br>
<br>
On 12/17/2010 05:02 PM, Saúl Ibarra Corretgé wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
As OpenSIPS is a proxy and at signaling level there is no continues<br>
traffic to help in detecting the ghost calls, such detection must be<br>
done at media level.<br>
<br>
</blockquote>
<br>
Hi,<br>
<br>
If this detection is done based only in the lack of RTP, then you could say that a UA that uses VAD (it doesn't transmit RTP when there is silence) timed out, but what really happened is that it was silent for a long time. How is the timeout condition detected?<br>
<br>
Did this new addition deal with this situation?<br>
<br>
<br>
Thanks and regards,<br>
<br>
</blockquote>
<br>
-- <br></div><div class="im">
Razvan Crainea<br>
<a href="http://www.voice-system.ro" target="_blank">www.voice-system.ro</a><br>
<br>
<br>
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