20 Jan
2011
20 Jan
'11
8:45 p.m.
The contact
usually is the IP address of the client. So, if you the SIP
server routes based on the contact header, it should send the INVITE
directly to the client not to the proxy. Somehow this all does not fit
together.
Clarification : Both clients A and B have the proxy as an outbound
proxy. Clients register to the SIP server through the proxy. The SIP
server routes the INVITE (INVITE from A that was proxied to SIP server)
to the proxy with the R-URI being constructed based on the contents of
the Contact header (IP only no port info). This is what I meant by
saying the SIP server routes INVITE based on registered Contact (R-URI
of INVITE is based on Contact header of client B's REGISTER message).