Motorola APX MOBILE O9 User Manual page 32

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Radio Controls
The PTT button on the side of the microphone serves two basic purposes:
• While a call is in progress, the PTT button allows the radio to transmit to other radios in the call.
Press and hold down PTT button to talk. Release the PTT button to listen. The microphone is
activated when the PTT button is pressed.
• While a call is not in progress, the PTT button is used to make a new call. See
Radio Call on page 46
32
for more information.
Methods to Make a