On Fri, Aug 26, 2016 at 5:18 AM, David McGough <kb4fxc@inttek.net> wrote:
possibility would be to have a Repeater transmitted PL tone directly follow the Repeater COS....Then, the simplex link radios would look for that PL tone. If the Repeater's RX COS isn't active, no PL tone transmitted, and no ping-pong.
I picked this quote out because it's really the most important point in this thread and was dismissed due to not having the right controllers. This can be solved! As Pete said:
what you need to do is put the repeater in external mode (shorting a pin to ground) and then use the flat audio in and out on the db-15 connector in the back. there are pins for ptt and cos. A nice little RPI and a URI-X and you have yourself a first class controler for that repeater
And my recommendation is to not only use this for the controller, but to use it for the link. I've deployed a ton of 5 GHz wireless ethernet links with Ubiquiti and Mikrotik equipment. It works great between high repeater sites with line of sight between them. This is almost always cheaper than link radio + isolator + filters + hardline + antenna and will give you a full-duplex link with out-of-band control. Tom KD7LXL