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The following pages give help and advice in answer to the questions that we get asked most often by our customers when using duplex radio systems.

If you can think of more subjects that we should cover please let us know, via email, or our feedback form.

Interfacing to 2 wire Communications Rings.


Duplex base Stations.


Mobile Radios.



( Also known as the " ***com " )




Our online form to complete for radio repairs.

The new JFMG frequency assignments

How to connect to Zetron equipment


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Last modified: February 09, 2006