Hytera PT580H Plus F4 - Group and Duplex Call Management; Group Call Procedures; Duplex Call Reception

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LCD prompts you to press the PTT to answer a call. When the other party stops
talking, you can hold down the PTT and speak into the microphone to call back.
 Duplex Call
When a duplex call is received, you can press
to receive. And both parties can
speak simultaneously without any operation.
Group Call
Available talk groups are preset by your dealer. DMO mode supports up to 1024 talk
groups, and TMO mode supports up to 2048 talk groups. Both DMO and TMO support
group call, and operations are the same in both modes.
¾ Transmitting a Group Call
1. In the home screen, press the knob to switch it to talk group selection mode (the
terminal displays the icon
).
2. Rotate the knob to select a talk group you want to call.
3. Press the knob again or press OK to confirm.
4. Hold down the PTT to transmit a group call.
Note:
In TMO mode, you can transmit a group call to a talk group only after it is attached
successfully. If you failed to attach a talk group, the reason may be that the group
does not exist in the network, or you are out of the network coverage.
¾ Receiving and Responding to a Group Call
When a group call is received, you need not make any operation. When the calling
party stops talking, you can hold down the PTT and speak into the microphone to call
back.