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.
A leader of innovation and state of the art solutions for Gateways and SIM Server solutions, locally and internationally to all existing networks GSM/CDMA/UMTS/VoIP