So, as I understand, the rotation of a particular ACP knob controls the volume for the headset phones and speakers. Don't the loudspeakers also have a separate knob for volume control?
To answer an attendant call --- Press the RESET key, select ATT transmission key, release and rotate the CAB reception knob (to be able to hear the attendant) and either use the RAD PTT, sidestick PTT or hand mike PTT keys to talk.
Is it required to select the ATT transmission key?
Last edited by matthewgamm; 15th Feb 2008 at 13:59.