A LOCALITY SUPERVISION SYSTEM

摘要

A supervising system for a group of localities like homes. A local equipment including a transmitter, a receiver and an emergency detector is installed in each locality. Identification signatures are exchanged continuously on a common transmission channel between the equipments by a signalling procedure which is initiated repeatedly. Any equipment may start the procedure and generates thereafter internally all control signals for transmitting its own signature and receiving signatures from the others. All equipments indicate alarm for a locality when its signature is not received correctly. An emergency condition modifies the signature which is transmitted. All equipments have the same system status and can each operate independently of other equipments.