Audio Control Panel

Interphone Radio Switch

Init/Rad SwitchThe INT/RAD switch operates as a press-to-talk switch for boom or oxygen mask microphones.

INT - The interphone is hot between pilots, regardless of transmission button selection. The INT knob must be selected for reception.

Neutral - When the switch is selected to neutral it disconnects microphones from transmission. Reception is normal.

RAD - When the switch is selected to RAD.