That's an interesting concept -- the same number in two locations?
> How does it work? Does it ring in two locations and first to answer > gets the call?
Yup. *and* if the other location picks up, they're on the call too.
Do you have to pay for two lines and one number?
Typically it is something that the telco does on a 'temporary' basis when one is moving between locations, and keeping the same number.
In the 'old days', it was done by simply running a physical jumper wire between the terminations of the pairs from the two different locations, in the frame room.
Depending on the telco, and depending on the length of time you needed 'overlapping' service, there may, or may *not* have been a charge for it.