I'm using AsteriskNOW (Asterisk 11) in my home and I have a hodgepodge mixture of phones, all working fine. I have Cisco 7940/60, 7941, 7970G, SPA504G as well as a Polycom 331 and Avaya 9640. At my office we have an old Trixbox CE 188.8.131.52 system and I have a VPN with an IAX2 trunk between the two. A lot of the time I work from home and I'd like to be able to set up one of my phones to register to both my AsteriskNOW and the Trixbox CE systems. In other words, have one button tied to my home extension (7001) and the other tied to my Trixbox extension (2991) so depending on which DID I want to call from I can just select that extension. Are any of the phones I have capable of that or is there a SIP phone that is? As it is now I have my dial plan configured so that if I press * before dialing it routes to the office PBX over VPN. I'd really like to have two different presences on one phone if possible.