REPEATER FOR TRANSMISSION SYSTEM FOR CONTROLLING AND DETERMINING THE STATUS OF ELECTRICAL DEVICES FROM REMOTE LOCATIONS

摘要

This disclosure relates to a repeater (40) for use in a two-way communication system for retransmitting information between a first device (20, 30) and a second device (50) to help ensure reliable two-way communication between the devices, the repeater (40) comprises a transmitter/receiver, the transmitter/receiver receiving information in signals from the first and second devices and transmitting the received information in signals for reception by the respective second and first devices and wherein further a direct communication path for the information between the first and second devices is provided, the direct communication path being intermittently unreliable. The first device (20, 30) comprises a master unit, the plurality of second devices (50) comprise control devices for controlling respective electrical devices.