Patent ID: 7200409

Claim:
An on-vehicle communication system including first radio communication means for transmitting predetermined data having state information in the detection of an abnormal state, the predetermined location information and a terminal ID to an information service center on occurrence of a predetermined event, said on-vehicle communication system comprising: an on-vehicle terminal main unit having the first radio communication means to communicate with the information service center; a mobile terminal detachable from said on-vehicle terminal main unit, and means for detecting a relative distance between said on-vehicle terminal main unit and said mobile terminal, wherein said means switches a main system for communications of said on-vehicle communication system, wherein said mobile terminal includes voice communication means, wherein said on-vehicle terminal main unit and said mobile terminal can communicate with each other via second radio communication means, and wherein if said first radio communication means has finished transmitting the predetermined data to the information service center, said mobile terminal has the second radio communication means transmit data for voice communication to the information service center via said on-vehicle terminal main unit.