Well at the risk of contradicting the lot of you, it seems to NAT nicely for us. We have an IP address on one domain, say 137... and the PBX is on another domain say 15... The IP Agent is launched from a PC on the 137 Domain and connects just fine to the 15 Domain. Also the PC is the West and the PBX is in the East. I will use sniffer to find out for sure and let you know.
Avaya, Octel, AUDIX, CMS and other fun stuff.
"There is always a way, it may not be pretty but there is always a way."
P:-D