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On 15/06/2011 8:15 PM, Matteo Campana wrote:
<blockquote
cite="mid:BANLkTimVnZxohvovOjYziz0NKXTdHw38TQ@mail.gmail.com"
type="cite">HI list,
<div>no idea?? :)</div>
<div><br>
</div>
</blockquote>
<br>
There not much substance in the information provided for an
assessment to be made.<br>
<br>
I would suggest you capture the network traffic between UAC (g711)
& Asterisk UAS ensuring the snap length is large enough to
capture the whole packet and do the same with traffic between
Asterisk UAC & Provider then use Wireshark and its telephony
feature to analyse VoIP calls, check the flows, you may discover the
problem this way!<br>
<br>
Larry.<br>
<br>
<blockquote
cite="mid:BANLkTimVnZxohvovOjYziz0NKXTdHw38TQ@mail.gmail.com"
type="cite">
<div>M.<br>
<br>
<div class="gmail_quote">On Mon, Jun 13, 2011 at 6:55 PM, Matteo
Campana <span dir="ltr"><<a moz-do-not-send="true"
href="mailto:matteo.campana@gmail.com">matteo.campana@gmail.com</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt
0.8ex; border-left: 1px solid rgb(204, 204, 204);
padding-left: 1ex;">Hi all,<br>
we have a problem with a reinvite sent by our SIP provider
to change audio codec due to the recognition of a fax tone.<br>
After that the SIP call session has been established (INVITE
and 200 OK) we have the following codec situation: <br>
<br>
UAC ASTERISK UAS |
ASTERISK UAC PROVIDER<br>
g711 <----------------------> g711
| g729 <---------------------------> g729
<br>
rtp
rtp<br>
<br>
After a while, we have the reinvite sent by the SIP provider
with g711 in the SDP.<br>
So asterisk need to change audio codec from g729 to g711 and
correctly we see on debug the following line:<br>
"Oooh, we need to change our audio formats since our peer
supports only g729" and asterisk send back 200 OK to the
provider.<br>
At this point we have one way rtp audio:<br>
<br>
UAC ASTERISK UAS |
ASTERISK UAC PROVIDER<br>
g711 ----------------------> g711 |
g711 ---------------------------> g711 <br>
rtp
rtp<br>
<br>
So the problem is that UAC does not hear audio at all.<br>
Any idea?<br>
<br>
(Asterisk version: 1.4.33.1).<br>
<br>
Thanks in advance,<br>
<font color="#888888">
Matteo
</font></blockquote>
</div>
<br>
</div>
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