Abstract: A wireless remote data sensor is disclosed for use in the cable television industry. It senses the status of equipment in the field, such as battery backup power equipment, amplifiers, pilot and signal level monitors, and voltage level for powering active equipment, and transmits the status information using a low data rate cellular data service known as Cellemetry. It also allows the cable system operator to switch each power supply to a backup power source and back remotely for conditioning and battery capacity measurement. Cellemetry uses the forward and reverse control channels of the AMPS cellular network to communicate 32 bit data packets.

Abstract: A wireless remote data sensor for use in the cable television industry. It senses the status of equipment in the field, such as battery backup power equipment, amplifiers, pilot and signal level monitors, and voltage level for powering active equipment, and transmits the status information using a low data rate cellular data service known as Cellemetry. It also allows the cable system operator to switch each power supply to a backup power source and back remotely for conditioning and battery capacity measurement. Cellemetry uses the forward and reverse control channels of the AMPS cellular network to communicate 32 bit data packets.

Abstract: A First-In-First-Out (FIFO) memory device having polled status flags to provide the status of the FIFO memory device when requested by an external source. The write pointer and the read pointer in the memory device specifies the memory location which is to be accessed during the next write operation or during the next read operation, respectively. The write pointer generates a value indicating the number of write operations that have been performed and the read pointer generates a value indicating the number of read operations that have been performed. In response to a polling signal from the external source, the FIFO memory device outputs the value indicating the number of locations that are currently written (i.e. used) or the value indicating the number of locations currently unwritten (i.e. available for use).