I've attached a zip file containing the logs and config I've used.
The sip-communicator instances are in the sub-dirs ua1, ua2.
I've also included the calls logs from the sip-proxy.
All goes well until ua2 receives an invite from ua1 then ua2 generates the exception when trying to deliver the invite-response (ringing) back to the proxy .
hop = [fe80::a00:20ff:fef9:cbf6]:5060/udp
net.java.sip.communicator.sip.CommunicationsException: Failed to send a RINGING response to an INVITE request!
at gov.nist.javax.sip.SipProviderImpl.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Caused by: javax.sip.SipException: fe80:0:0:0:a00:20ff:fef9:cbf6:5070
at gov.nist.javax.sip.stack.SIPServerTransaction.sendResponse(Unknown Source)
... 3 more
logs.zip (8.13 KB)
It's fast, it's easy and it's free. Get MSN Messenger today! http://www.msn.co.uk/messenger