3-17190-01182-01 Rev. A Garmin GNC 255A/255B Pilot’s Guide3.4.3 Intercom On/OffThe Intercom On/Off function toggles intercom on and off. The intercomcan also be toggled on/off with a remote switch, if installed. The Intercom On/Off function must be set to On to make the Adjust Intercom function available.1. Press FUNC to access the Functions. Turn the LARGE knobto select the ICS Function. Turn the SMALL knob to view theIntercom On/Off function. Then, press the ENT key.Press ENT to Acceptthe Selected ValuePress CLR to Returnto the Default ValueTurn SMALL Knob To Select On or OffFigure 3-31 Turn the Intercom On/Off2. Turn the SMALL knob to set the Intercom On or Off. Then,press the ENT key to save the selected value.3.4.4 Speaker On/OffThe Speaker On/Off function toggles speaker output on and off.1. Press FUNC to access the Functions. Turn the LARGE knobto select the ICS Function. Turn the SMALL knob to select theSpeaker On/Off function. Then, press ENT.Press ENT to Acceptthe Selected ValuePress CLR to Returnto the Default ValueTurn SMALL Knob To Select On or OffFigure 3-32 Turn the Speaker On/Off2. Turn the SMALL knob to set the speaker output On or Off.Then, press the ENT key to save the selected value.