Main TG Group: 44120(MAIN) Sub TG Group: 44020(SUB) 44021(NXDN)
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PTT for up to 3 seconds. This will link you to that talk group.
At the next PTT, I will join the talk group.
You can now run TX and RX on that talk group.
The first PTT only tells the system to use that talk group.
4000 No need to unlink.