We have an office with two phones, one at either end of a large space. I want these phones to have the same number, and to ring at the same time. These phones never need to be called individually, and they don't need to place simultaneous outgoing calls. It seems like the "Shared Lines" feature is closest to what I'm looking for, but the list of devices which support Shared Lines are all wired devices. Ideally, I want wireless handsets.
Is it possible to have a base station with two wireless handsets, sharing the same number, using the setup I describe? Is it necessary to purchase two digital lines to make this setup work?