This feature allows several ground operators to isolate the cockpit from their conversation (i.e. the cockpit crew will not hear the « ground » conversation). However the audio link coming from the cockpit to the mobiles on ground remains active. For example this optional feature is useful in a training context (dialog pupil-instructor unheard from the cockpit). Depending on system configuration, cockpit isolation could be enabled by the use of a dedicated button located on the left side of the headset, or by the use of a small remote control placed between the Airlink system and the headset.