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.
Our telephone systems embrace the latest feature-rich power of internet telephony voice-over-IP technology with the carrier-grade resilience that our customers demand, allowing cheaper calls to most international destinations.