Abstract: A communication system is proposed for transmitting at least one of the data, the program, and a combination of them from a host facility to a communicator such as a communication terminal device. In this communication system, the data or the program becomes unable to be used when a predetermined time has elapsed after it is transmitted from the host facility to the communicator. This communication system is provided with the function of giving a warning before the use of the transmission becomes unable and the function of resuming the use in accordance with the user's instruction even after the use becomes unable.

Abstract: A key system using an ID card which can output ID data is combined with a mechanical ignition key. The key system is provided with a transceiver for receiving ID data from the ID card, a flash memory for storing the ID data and a CPU. When the stored ID data in the flash memory coincides with the ID card data obtained by the transceiver and operation is performed with the ignition key, the CPU enables the operation of an engine start. Furthermore, if a preset protection time has elapsed since the CPU recognizes the coincidence of the stored and ID card data, the operation by the ignition key is nullified.

Abstract: A method and system for providing cross-platform remote control and monitoring of a facility electronic access controller includes a CPU, a non-volatile memory, at least one of a network port and a cross-platform port, and an input/output interface. The system includes an input access control device operatively linked to the interface. The input access control device generates identification data of a user. The system also has an output access control device operatively linked to the interface. The system also includes a cross-platform network and a remote computer operatively linked to the facility access controller by the cross-platform network, whereby the cross-platform network enables remote operation of the facility electronic access controller irrespective of compatibility between an operating system of the remote computer and the operating system of said facility access controller.

Abstract: A system for providing cross-platform remote control and monitoring of a facility access controller, the system comprising a cross-platform network controller including, a CPU, a non-volatile memory, at least one of a network port and a cross-platform port, an input/output interface, at least one terminal control unit operatively linked to the input/output interface, the terminal control unit being capable of operating in a stand alone mode relative to the cross-platform network controller, at least one of an input access control device and an output access control device being operatively linked to the terminal control unit, a cross-platform network, and at least one remote computer operatively linked to the cross-platform network controller, the cross-platform network facilitating remote operation of the at least one terminal control unit while at least one of system upgrades and changes within the at least one terminal control unit are easily implemented via the cross-platform network controller.