Background: We've purchased a 2nd home on the coast of Maine and will be splitting our time between it and our primary residence. Cellular coverage at the new place is spotty. For a number of reasons I don't need to go into here, I currently use Vonage for both home and business lines (as opposed to cell service).

Vonage provides a facility through their web UI that allows customers with multiple "vonage boxes" to move lines from box to box, and they're sending me a 2nd box to install at the other property for that purpose at no additional charge.

While this seems to be a fairly reasonable way to stay connected to my "land lines," I'm wondering if there's a provider that offers an option to ring phones at both locations without requiring another number/line allocated just for that purpose, and would allow me to move from location to location without having to update my configuration . . . essentially creating an extension phone at the alternate house.

The community on Flyertalk is, by definition, fairly mobile, so I'd think someone here would have dealt with this issue before.

Thanks in advance for any thoughts/insight/solutions