Hytera PDC680, Руководство пользователя

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The radio rings and vibrates to indicate the incoming call. You can press the PTT key or the
Back/Answer Call key to answer the call.

Off Air Call Set-Up (OACSU)
The call is established automatically. You can listen to it without any operation.
To respond to the call, press and hold the PTT key, and then speak into the microphone.
Ending a Private Call

Conventional mode: A private call ends automatically when the call hang time expires.

Trunking mode: A private call ends when the calling or called party taps or presses
the Power/End Call key.
4.1.3 Emergency Call
In case of an emergency, you can initiate an emergency call to ask for help from other personnel or the
control center. An emergency call has the highest priority and can disrupt other calls with lower priority.
If the feature is configured and enabled by your dealer, you can press the preprogrammed Emergency
On key to initiate an emergency call. The emergency call ends when the calling party presses the
preprogrammed Emergency Off key.