I have recently configured and deployed a simple split-site voted repeater using app_rpt and three RTCMs: two for a pair of receivers, and one for the transmitter.  So far, the system is providing top-notch performance in every aspect. 

Question:  Is there a common practice for failing various individual receivers via DTMF command? I imagine this would be of great use for a number of practical and diagnostic applications. 

If there isn't, is anyone inspired enough to make this happen? 

Thanks for reading, and have a nice day!

-Sam
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KJ6QFS
Sam Skolfield