Hi all. Im looking at implementing a SIP T1 to our facility and Im trying to learn some things about it and what I would need. Ive looked over a few documents, and I cant seem to get my head around what exactly is a "SIP Proxy Server". I get the impression that its a callmanager server, but I cant seem to read anything that specifically says that. I read that "The Cisco SIP Proxy Server is a software application that provides
call routing services in an Internet Protocol (IP) telephony network.", which sounds like what callmanager does. Am I correct in thinking that a SIP Proxy Server IS in fact a callmanager? Any help appreciated.
Since Callmanager (CUCM) isnt't suited for terminating SIP calls
a piece of SIP proxy functionality can be provided, called CUBE:
IP-Phone ---- CUCM --- CUBE --- SIP Provider
Cisco Unified Border Element runs on 26xx, 28xx, ... routers
and terminates SIP calls from your provider.
Just do a search for CUBE in the forum.