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Press and hold the red function key, and the radio attempts to make a red key call.
Press the red function key and then the back key, and the radio attempts to make
a silent red key call. However, if the silent call is made to the predefined direct
mode group, it changes into an ordinary red key call to the group. See also Red
key calls on page 30.
If a compatible direct mode gateway device is available, and a red key call is made
to a predefined direct mode group, the call may also be transmitted to the
network mode group that is predefined for the gateway device.
If the radio receives a red key call, or a call made to a destination that is
predefined as an emergency number, the radio plays a tone, and Priority call is
displayed with the call information.