Patent ID: 6604038
Filing Date: 2003-08-05
Classification: G07C,G08G,H04L

Abstract:
An apparatus for establishing a data communication link between a data bus of a vehicle and a remote interrogation device where unwanted signals may be received by the data bus and corrupt data on the data bus, wherein said apparatus comprises:a local transceiver in operable electrical communication with the data bus for transmitting data to and data from the data bus; a local processor in operable electrical communication with both said transceiver and the data bus; and a switch in operable electrical communication with said local processor, local transceiver, and the data bus, wherein said switch in a closed position connects said local transceiver and the data bus and in an open position isolates said local transceiver from the data bus, and wherein said local processor in a data transfer mode closes said switch and in an idle mode opens said switch such that in the idle mode unwanted signals received by said local transceiver are not input to the data bus.