I have a couple of SIP ready ATA's and some spare Cisco routers (2600 & 3600) sitting around and I was wondering if it is possible to use the 2600/3600 to direct calls between the phones. I just want to mess around with SIP and I was thinking it would be nice if I could setup one ATA as ext 123 and one as 456 and call from one phone to the other with the router acting as the intermediary. I know that all of the Cisco docs say to use a proxy server and I don't think the router supports that, but is there a way to setup what I want to do?
