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‐ Pressing the knob (knob stays in) disconnects the associated audio reception channel.
Note: For reception of DME audio navigation signals associated to an ILS or MLS station,
the LS pushbutton on the FCU must also be selected.
(3) SELCAL/CALL RESET key
Pressing this key extinguishes CALL, MECH, and ATT lights.
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
COMMUNICATIONS
INTERCOMMUNICATION SYSTEMS - CONTROLS
A318/A319/A320/A321 FLEET DSC-23-20-20 P 5/12
FCOM 19 AUG 10
(4) ON VOICE key
This key allows the flight crew to inhibit the audio navigation signals (VOR, ADF)
Pressing this key filters out ident signals and turns on the green ON light.
(5) INT/RAD switch
This switch operates as a press-to-talk switch for boom mike or oxygen mask mike.
INT : Boom and mask mikes transmit on interphone regardless of
which transmission key is selected. For reception on interphone,
the crew member must have INT selected (INT reception knob
out).
Neutral : Reception is normal. Boom and mask mikes do not transmit.
RAD (press and hold) : Boom and mask mikes transmit on the radio selected on the
audio control panel.
(6) Passenger address (PA) function
(Refer to DSC-23-20-50 PASSENGER ADDRESS ).
AUDIO CONTROL PANEL
Applicable to:
(1) Transmission keys
Pressed : The associated channel is selected for transmission.
The three green lines come on.
The pilot deselects the channel by pressing the pushbutton again, or
selecting another channel.
CALL : The legend flashes in amber (and the buzzer sounds), when the SELCAL
system detects a call.
MECH : The legend flashes in amber (and the buzzer sounds), for a call from the
nose gear bay. The MECH light goes off after 60 s, if it is not reset.
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
COMMUNICATIONS
INTERCOMMUNICATION SYSTEMS - CONTROLS
A318/A319/A320/A321 FLEET DSC-23-20-20 P 6/12
FCOM 19 AUG 10
ATT : The legend flashes in amber (and the buzzer sounds), for a call from a cabin
crewmember. The ATT light goes off after 60 s, if it is not reset.
SAT CALL : The legend flashes amber when the SATCOM system detects a call.
The three green lines flash during the establishment of air to ground calls, or
when SATCOM calls are on hold.
After call establishment, the three green lines remain steady.
Note: The ATT light may spuriously flash in amber, without an associated buzzer sound and
cabin crew call.
(2) Reception knobs
These knobs allow the flight crew to select reception channels and to adjust their volume.
Pressing and releasing the knob (knob out) selects the associated ‐ audio reception channel.
The integral white light comes on. Rotating the knob adjusts the volume. The ANN LT knob
controls the brightness.
‐ Pressing the knob (knob stays in) disconnects the associated audio reception channel.
Note: For reception of DME audio navigation signals associated to an ILS or MLS station,
the ILS (or LS) pushbutton on the FCU must also be selected.
(3) SELCAL/CALL RESET key
Pressing this key extinguishes CALL, MECH, and ATT lights.
(4) ON VOICE key
This key allows the flight crew to inhibit the audio navigation signals (VOR, ADF)
Pressing this key filters out ident signals and turns on the green ON light.
(5) INT/RAD switch
This switch operates as a press-to-talk switch for boom mike or oxygen mask mike.
INT : Boom and mask mikes transmit on interphone regardless of
which transmission key is selected. For reception on interphone,
the crew member must have INT selected (INT reception knob
out).
Neutral : Reception is normal. Boom and mask mikes do not transmit.
RAD (press and hold) : Boom and mask mikes transmit on the radio selected on the
audio control panel.
(6) Passenger address (PA) function
(Refer to DSC-23-20-50 PASSENGER ADDRESS ).
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
COMMUNICATIONS
INTERCOMMUNICATION SYSTEMS - CONTROLS
A318/A319/A320/A321 FLEET DSC-23-20-20 P 7/12
FCOM 19 AUG 10
AUDIO CONTROL PANEL
Applicable to:
(1) Transmission keys
Pressed : The associated channel is selected for transmission.
The three green lines come on.
The pilot deselects the channel by pressing the pushbutton again, or
selecting another channel.
CALL : The legend flashes in amber (and the buzzer sounds), when the SELCAL
system detects a call.
MECH : The legend flashes in amber (and the buzzer sounds), for a call from the
nose gear bay. The MECH light goes off after 60 s, if it is not reset.
ATT : The legend flashes in amber (and the buzzer sounds), for a call from a cabin
　
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