When you receive an incoming call to your phone number, your other telephones (cell, home phone, car phone) will ring as well and the first one answered will be connected to the caller. Basically the call will be routed to all phone sets, which you will list in simultaneous ring option.
Stonehenge is an international carriers carrier offer a full A-Z, US domestic and Canada termination, turn key white label VoIP solution, Mobile VoIp, and ratail IP products.