The intercom works excellent. For pairing you can have it set up to another NCOM and a blue tooth device at the same time. There is no need to repair when you switch from intercom to phone use.
Jim, there would be if it was two N-Com bluetooth modules paired together as a wireless intercom. They would each be the other's single pairing. Perhaps I was mistaken but I thought that was the configuration the question was addressing. As the question also asked about switching between any devices re-pairing would also be necessary there.
Unless the N-Com bluetooth modules have been upgraded since I got mine a couple of years ago they only pair to one device at time. And that's the only device they can seek. If they can still only pair to one device at a time then wireless intercom to another N-Com bluetooth module would be the device's only pair. To then reconnect back to a phone, GPS or other device would require going through the pairing process again.