Abstract: A system for providing reservation data is presented. The system includes a reservation data system interface that receives reservation data, such as the availability of rooms and rates for such rooms, and update data, such as when rates change or rooms are reserved, from two or more reservation systems, such as central reservation systems for two or more different hotels. A master reservation system receives the reservation data from the reservation data interface and stores the reservation data in a database, and updates the database with the update data. A user interface system coupled to the master reservation system receives reservation request data and provides updated reservation data in response to the reservation request data.

Abstract: A radio frequency modulator/demodulator (modem) and method for receiving and transmitting data over a radio frequency data link. The modem has a transmitting section which includes a modulator which modulates a radio frequency signal in response to data provided by, for example, an associated processor. The transmitting section further includes a watchdog or enable circuit which monitors a request-to-send signal produced by the associated processor, with the request-to-send signal being present when the processor is generating data to be transmitted over the data link. The enable circuit will disable the modulator should a transmission exceed a maximum predetermined time period, thereby preventing the associated processor from monopolizing the data link in the event of a processor failure.