Multiple handset use
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Push-to-talk (PTT)
End or leave a PTT call
For one-to-one PTT calls, both initiating and destination devices 
can end the PTT call. For PTT calls to multiple devices, the initiating 
device can end the PTT call. If any one of the destination devices 
leaves the PTT call, the call continues until all participants or the 
initiator hangs up.
Press 
 on the handset. The screen shows  
Push to talk Ended. 
-OR-
Place the handset in the telephone base or charger, then the 
handset returns to idle mode.
Note: After PUSH TO TALK is released, the PTT call remains open for a short time. If no one 
presses PUSH TO TALK within ten seconds, the PTT call ends automatically.