[reSIProcate-users] Stack dropping response

[Andrew Wood <ajwood@xxxxxxx>]

Why is a 180 response to the following INVITE being dropped with this 
error.  The creator of the Contact field is a Cisco ATA but it isn't 
generating a branch tag which I suspect is something to do with it?
It seems resiprocate doesnt like responses to an invite generated by the 
ATA, it handles responses to invites created by other user agents OK.

INFO | 20090107-162450.068 |  | RESIP | 3081394384 | SipMessage.cxx:433 
| Trying to compute a transaction id on a 2543 response. Drop the response




INVITE sip:203@xxxxxxxxxxxxx:5060;user=phone SIP/2.0
Via: SIP/2.0/UDP 192.168.254.3:5060
Max-Forwards: 70
Contact: <sip:203@xxxxxxxxxxxxx:5060>
To: <sip:203@xxxxxxxxxxxxx:5060;user=phone>
From: <sip:202@xxxxxxxxxxxxxxx;user=phone>;tag=3992865483
Call-ID: 1875955767@xxxxxxxxxxxxx
CSeq: 1 INVITE
Content-Type: application/sdp
Content-Length: 248

v=0
o=202 30023 30023 IN IP4 192.168.254.3
s=ATA186 Call
c=IN IP4 192.168.254.3
t=0 0
m=audio 16384 RTP/AVP 8 0 4 101
a=rtpmap:8 PCMA/8000/1
a=rtpmap:0 PCMU/8000/1
a=rtpmap:4 G723/8000/1
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-15