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P.A Interface:
The Public Adress Interface is used on Telephone Systems, where anyone, may dial an access code and make an anouncement over the PA system. This is very handy as it eliminates the requirement for a dedicated, centralised microphone. Applications include Schools, Office Buildings, multi zoned PA systems and large factory units. The Interface unit is easily connected to any Telephone system. This may be the solution to your problem.

PA Address System

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