Abstract: A vehicle display device is provided with a communications interface, which couples the vehicle display device to portable input devices inside the vehicle. The portable input devices are thus provided with the ability to control the display device and what is displayed thereon. The communications interface also enables the portable input device to control vehicle subsystems such as a climate control system, entertainment system and the like. Portable input devices equipped with sensors have sensor-generated information displayed on the vehicle display device.

Abstract: A vehicle display device is provided with a communications interface, which couples the vehicle display device to portable input devices inside the vehicle. The portable input devices are thus provided with the ability to control the display device and what is displayed thereon. The communications interface also enables the portable input device to control vehicle subsystems such as a climate control system, entertainment system and the like. Portable input devices equipped with sensors have sensor-generated information displayed on the vehicle display device.

Abstract: A system and method of providing service for a Telematics communication device includes a first step of providing a vehicular radiotelephone communication system including a cellular radiotelephone network for connecting the communication device with a service operator. The communication device includes a controller pre-programmed with a hotlined analog telephone number and a cleared digital telephone number if so equipped. A next step includes placing a call by the communication device using the hotlined analog telephone number. A next step includes determining whether the communication device has a service contract in place with the service operator, wherein if the communication device does not have a service contract, switching the call to a voice recording, and wherein if the communication device does have a service contract, providing service for the communication device.

Abstract: The present invention provides, in a preferred embodiment, a method whereby resynchronization between a transmitter and receiver is activated intuitively by, and transparently to, an authorized user, including: transmitting at least a first message from the transmitter to the receiver; and, in response to the receiver receiving the first message, the receiver detecting the absence of synchronization between the transmitter and the receiver and performing a resynchronization procedure to restore synchronization between the transmitter and the receiver.

Abstract: A system for remotely controlling a desired door locking or other function in a vehicle or other protected environment has a transmitter and receiver for communicating a message including a sequence number, the code of a selected function to be performed and an authenticator. An algorithm in the transmitter and in the receiver has a cryptographic key and a seed code. Each algorithm generates the authenticator as a function of both the seed code and the function code; if the authenticators are equal, the message is valid. Upon each transmission the seed code is updated and the sequence number is incremented. The receiver updates its seed code according to the transmitted sequence number to keep the algorithms in synchronism. To initialize the receiver to recognize the transmitter IDs, the receiver is manually enabled for programming, a counter is set to zero, the ID is transmitted from each transmitter, each ID is stored in sequence, and the counter is incremented for each ID received.

Abstract: A system for remotely controlling a desired door locking or other function in a vehicle or other protected environment has a transmitter and receiver for communicating a message including a sequence number, the code of a selected function to be performed and an authenticator. An algorithm in the transmitter and in the receiver has a cryptographic key and a seed code. Each algorithm generates the authenticator as a function of both the seed code and the function code; if the authenticators are equal, the message is valid. Upon each transmission the seed code is updated and the sequence number is incremented. The receiver updates its seed code according to the transmitted sequence number to keep the algorithms in synchronism.