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The emergency calling alarm system can be extended to cover a much wider area of operation. The system also finds applications in such location as large stores where a hearing impaired person might be employed but needs to be easily contacted. In the store case, the hand held radio transmitter is replaced by a press button connected directly to a high powered radio transmitter which sends out the coded radio signal to the alarm unit.

In the more general case, included in the system is a low/high power radio signal translator where the low powered radio signal from the hand held transmitter is received by a receiver which in turn operates a higher powered transmitter.

Systems can be designed with ranges up to 8 kms.

Last updated: 8th February 1999

This page is the Extended Area Emergency Alarm page of D.C.T. Associates Pty Ltd, ACN 007 966 145, designers and manufacturers of specialised alarm systems for the hearing and physically disadvantaged.