Abstract: A vehicle-mounted communication device, which consumes less electric power, and a method of controlling the vehicle-mounted communication device are provided. The vehicle-mounted communication device includes a modem 12, which is configured to perform wireless communication via a portable telephone network, a judgment part 183, which is configured to judge whether the modem 12 is in a wireless communicable state, and a judging timing determination part 184. The judging timing determination part 184 is configured to stop the judging operation of the judgment part 183 until a predetermined condition is satisfied, when the judgment part 183 judges that the wireless communication is not in an enabled state while a driving source of a vehicle is stopped.

Abstract: An object of the present invention is to enable a SIM interface to be selected more appropriately. A telematics controller according to the present invention includes a vehicle information collecting unit that collects vehicle information about a vehicle mounted with the telematics controller, a SIM switching unit that enables one of a plurality of SIM interfaces to communicate, and a switching instructing unit that instructs the SIM switching unit to switch the SIM interface to a SIM interface associated in advance according to the vehicle information collected by the vehicle information collecting unit.

Abstract: A vehicle-mounted communication device, which consumes less electric power, and a method of controlling the vehicle-mounted communication device are provided. The vehicle-mounted communication device includes a modem 12, which is configured to perform wireless communication via a portable telephone network, a judgment part 183, which is configured to judge whether the modem 12 is in a wireless communicable state, and a judging timing determination part 184. The judging timing determination part 184 is configured to stop the judging operation of the judgment part 183 until a predetermined condition is satisfied, when the judgment part 183 judges that the wireless communication is not in an enabled state while a driving source of a vehicle is stopped.

Abstract: An object of the present invention is to enable a SIM interface to be selected more appropriately. A telematics controller according to the present invention includes a vehicle information collecting unit that collects vehicle information about a vehicle mounted with the telematics controller, a SIM switching unit that enables one of a plurality of SIM interfaces to communicate, and a switching instructing unit that instructs the SIM switching unit to switch the SIM interface to a SIM interface associated in advance according to the vehicle information collected by the vehicle information collecting unit.