20 | Getting Started
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Note: While pressing the expansion PTT (on the expansion head), other PTT press on an accessory
connected to the control head is ignored. This only applies to MTM5200, MTM5400, and MTM800 FuG.
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Description
S
key
END
Press to initiate or answer duplex calls, or send messages.
Press in home screen to enter Recent Dialed Calls.
FUNCTION key 1
By default:
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Short press — activates/deactivates the horn and lights feature.
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Long press — adjusts backlight.
FUNCTION key 2
By default:
•
Short press — turns the speaker on/off.
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Long press — activates/deactivates screen saver.
FUNCTION key 3
By default:
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Short press — adjusts backlight.
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Long press — unassigned.
PTT (Push-To-Talk) button
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Press and hold to talk in simplex calls or to initiate a group call, release it to listen.
M
ICROPHONE