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Finally got my Radtel RT-4D radios set up so they'll communicate on Digital Simplex.

KM7BVY

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I didn't have any problems getting the RT-4D's set up for Analog but Digital Simplex was giving me fits. I was using the TG-99 with Zero Luck. They each have their own I.D. so that wasn't the issue. Then I set them up with TG-1 and they actually worked and would talk with each other. Here's some pics of how they're set up.
 

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devicelab

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I don't know if this was your issue but the 4D requires a Rx Group List or you won't hear any audio output. Motorola and others (DM-32) don't require the Rx Group List.
 

KM7BVY

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When I had it set up the other way I had a group list but the radio still wouldn't RX. All I know is that it's finally working.
Next step, DMR Repeaters.
 
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