contact info in ok from carrier different ip in ack
I have a carrier who responds to my invites with a 200 ok. they have a contact ip address that is different then the ip address the message came from. I need to respond with an ACK to the contact ip. How can i do this?
his message:
Aug 29 16:18:11.025 On [3:0]162.221.25.179:5060 received from 63.79.178.194:5060
SIP/2.0 200 OK
f: "UNAVAILABLE"<sip:7033488415@162.221.25.179>;tag=as480e07ec
t: <sip:17035975743@63.79.178.194>;tag=750b847297212014829201155
i: 2d569dbe0b833c435f167cff56f77d38@10.0.0.10
CSeq: 102 INVITE
Server: CS2000_NGSS/9.0
k: 100rel, resource-priority, replaces
Allow: ACK,BYE,CANCEL,INVITE,OPTIONS,INFO,SUBSCRIBE,REFER,NOTIFY,PRACK
v: SIP/2.0/UDP 162.221.25.179:5060;received=162.221.25.179;branch=z9hG4bK9i29ou307of51q5m81o0.1