[Rtcomm] [Rtcomm] [Bug 3824] SIP Calls keep ringing despite being picked up by other side

[From: bugzilla-daemon at maemo.org]

https://bugs.maemo.org/show_bug.cgi?id=3824





------- Comment #50 from mikhail.zabaluev at nokia.com  2009-01-13 17:51 GMT+3 -------
(In reply to comment #49)
> Here is a tcpdump trace with complete packets.

Thank you. Now I see a few problems.

Either the proxy at callcentric.com (cf. packet #4), or maybe something in the
middle, rewrites our Via header in responses with the external address, instead
of putting it into the "received" parameter. This is bad behavior in SIP, and
more importantly, it upsets our NAT detection logic.

Then, there are multiple IP addresses returned for "callcentric.com" domain
name, for load balancing, so our stack may still send requests to them
interchangeably, but the behavior is slightly different.

A few more things to try, just in case:
1) Set the "Outbound proxy" to one of the IP addresses that callcentric.com
resolves to, e.g. 204.11.192.36.
2) Try the fully specified SIP URI to contact a phone number, in the form
"sip:17771234567 at callcentric.com".


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