> My question is, can you register an extension twice and get it to
> ring at the same time on both devices?
Each device (or line) has to be uniquely identifiable, so you each line on
each device has to register separately.
Eg:
device1 -> num1
device2 -> num2
device3.ext1 -> num3
device3.ext2 -> num4
tony => dial(num1&num3)
mark => dial(num2 & num4)
Calls for Tony will ring on his desk (device1) and in the boardroom
(device3) identified as a call for him (ext1).
Calls for Mark will ring on *his* desk (device2) and in the boardroom
(device3), identified as a call for him (ext2).
paul