If you&#39;re going to the trouble of putting up backup RF links.... a good idea. Take a look at the Ubiquity data radios ( <a href="http://www.ubnt.com">http://www.ubnt.com</a> ) . <br>
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Your own RF data network. Forget the public internet except for an entry point. And ditch the controllers.<br>
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On the analog RF links..<br>
If you have a lot of overlap on the simulcast transmitters, you&#39;ll need do some audio delay lines to keep everything in phase. And I&#39;d recommend a GPS disciplined time base for the MSF repeaters.<br>
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I used to maintain a couple simulcast paging systems. Simulcast with overlap is a big pain. <br>
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Sent from my Android phone with K-9 Mail. Please excuse my brevity and typing errors.