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.
TELTUB Inc. is a provider of unprecedented phone services to consumers and small businesses. TELTUB phone services can interact, in real-time, with other messaging technologies and platforms.