Icom IC-F610 - Manual (Page 23)

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4
OTHER FUNCTION
D D RX Speaker function (optional OPC-617 is required)
Output the receive audio to an out-of-vehicle speaker.
External audio amplifier and speaker are required.
D D Ignition SW function
The transceiver’s power turns ON/OFF automatically
depending on the ignition switch position.
This function requires additional optional wiring cables.
Please consult your dealer.
D D Auto Talk Around function
If the transceiver loses the TSC (Trunking System
Controller) signal, the transceiver turns to conventional
mode, and then the conventional channel is automatically
selected.
The transceiver will periodically scan the trunking channel,
and automatically return to the trunking mode when any
valid control channel is available.
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