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.
After many years in the VoIP industry supplying long distance service and VoIP technical support, AirStar Communications has decided to expand into the residential and business phone service.