can this scenario be worked out
remote office has 4 pots lines, key system and t1 data link to main office via 1720
main office has pri to pstn, vg200 gateway, callmanager, unity and ip phones, 3640 router
obviously, i could put ip phones at the remote office and do away with key system and pots lines, but could i keep the key system with the 4 line appearance and just put in a cisco 1700 or 2600 series with 4 FX0/S ports to give dial tone to the key system?
could this also be done with a t1 - ie a t1 from the remote office router into the key system t1 card?