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When the SER receives the call from the UA it forwards the call to the
B2BUA it is because the B2BUA is replying directly the 183 and 200 ok
messages (I guess).<br>
<br>
The BYE retransmisions are due the B2BUA is sending the BYE with a
different route:<br>
U 2005/06/26 23:00:05.104387 200.94.75.6:5065 -> 200.94.75.6:5060
<br>
BYE <a class="moz-txt-link-abbreviated" href="mailto:sip:018183324166@200.94.75.6:5060;lr=on">sip:018183324166@200.94.75.6:5060;lr=on</a> SIP/2.0.
<br>
Via: SIP/2.0/UDP 200.94.75.6:5065.
<br>
To: 8183651723
<a class="moz-txt-link-rfc2396E" href="mailto:sip:8183651723@sipsrv.conecta-te.com"><sip:8183651723@sipsrv.conecta-te.com></a>;tag=d96bd682df5aa957o0.
<br>
From: <a class="moz-txt-link-rfc2396E" href="mailto:sip:018183324166@sipsrv.conecta-te.com"><sip:018183324166@sipsrv.conecta-te.com></a>;tag=71eb8754.
<br>
Call-ID: <a class="moz-txt-link-abbreviated" href="mailto:1a18e21e-eaa9b26b@172.31.253.127">1a18e21e-eaa9b26b@172.31.253.127</a>.
<br>
CSeq: 102 BYE.
<br>
Max-Forwards: 16.
<br>
<font color="#ff0000"><b>Route:
<a class="moz-txt-link-rfc2396E" href="mailto:sip:8183651723@200.94.75.6:61767"><sip:8183651723@200.94.75.6:61767></a>.</b>
</font><br>
Record-Route: <sip:200.94.75.6;ftag=d96bd682df5aa957o0;lr=on>.
<br>
Contact: 8183651723 <a class="moz-txt-link-rfc2396E" href="mailto:sip:8183651723@172.31.253.127:5060"><sip:8183651723@172.31.253.127:5060></a>.
<br>
User-Agent: Linksys/PAP2-2.0.12(LS).
<br>
Content-Length: 0.
<br>
P-hint: rr-enforced.
<br>
<br>
As you can see for some reason it is mixing the SER IP address with the
UA rport.<br>
<br>
I guess as this route doesn't exist it is because there are a lot of
retransmissions.<br>
<br>
I have the SER debug from this call too. I can sent you if it's
necessary<br>
<br>
Regards<br>
<br>
Alberto<br>
Klaus Darilion wrote:<br>
<blockquote type="cite" cite="mid42C02089.4090501@pernau.at">The first
strange thing is, that the 183 and 200 OK messages bypass the first
proxy and the messages are sent directly from the B2BUA to the SIP
client. Although the ACKs look fine.
<br>
<br>
And there is a problem with the BYE - you have a lot of retransmissions
of the BYE from the B2BUA to the client - maybe a NAT problem?
<br>
<br>
regards
<br>
klaus
<br>
<br>
Alberto Cruz wrote:
<br>
<blockquote type="cite">Hi Klaus
<br>
<br>
I'm trying to do the following:
<br>
<br>
UA behind a NAT ----> SER+MEDIAPROXY --------> B2BUA ----->
SER+MEDIAPROXY------> PSTN GATEWAY
<br>
<br>
The first callee is the UA behind the NAT and then the B2BUA calls to
the PSTN.
<br>
The B2BUA has a public IP address (isn't nated)
<br>
The PSTN GATEWAY has a public IP address too.
<br>
<br>
I'm attaching the full NGREP sniffing from the call in order you can
see all the flow.
<br>
<br>
Regards
<br>
<br>
Alberto Cruz
<br>
Klaus Darilion wrote:
<br>
<br>
<blockquote type="cite">30 seconds calls are usually an ACK problem
due to NAT. Make sure the callee receives the ACK.
<br>
<br>
regards,
<br>
klaus
<br>
<br>
Greger V. Teigre wrote:
<br>
<br>
<blockquote type="cite">Only B2BUA can generate a BYE, so it's
definitely not SER. However, there may be something else that causes
Vovida to generate it. I would start in that end. I don't know Vovida,
so I wouldn't know where to start...
<br>
g-)
<br>
<br>
<br>
<br>
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<br>
</blockquote>
<br>
<br>
<br>
</blockquote>
<br>
</blockquote>
<br>
</blockquote>
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