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Used by flight crew to call ground
crew or answer ground crew call.
CALL
Used by ground crew to call flight
crew or answer flight crew call.
Vol. 1 05--20--6
COMMUNICATIONS
Audio Integrating System REV 3, May 03/05
Flight Crew Operating Manual
CSP C--013--067
C. Attendant’s Handset
Switches on the attendant’s handset cradle and on the intercom control panel, in the
flight compartment, are used for routing communications to the crew and passengers.
On the handset cradle, the ATT button signals both attendant stations by illuminating
the ATT indicators green. To call the flight crew, the attendant removes the handset
from the hook and presses the FLT or the EMG button. This will illuminate the CALL or
EMER light on the intercom control panel and sound a high-low chime on the flight
compartment speakers. When PA is selected on the intercom control panel, and the
RT/IC switch, on the control wheel, is set to IC, two-way conversation is established.
The galley speaker is muted when a flight attendant’s handset is activated.
Vol. 1 05--20--7
COMMUNICATIONS
Audio Integrating System REV 3, May 03/05
Flight Crew Operating Manual
CSP C--013--067
Attendant’s Handset
Figure 05---20---5
Attendant’s Handset
FLT (green led)
Used to call
flight crew.
Press to Talk
Used when cabin
attendants talk on
passenger address
system.
EMG (amber led)
Used to call
flight crew.
PA (green led)
Used to address
passengers.
ATT (green led)
Used to call
other flight
attendant.
Vol. 1 05--20--8
COMMUNICATIONS
Audio Integrating System REV 3, May 03/05
Flight Crew Operating Manual
CSP C--013--067
D. Passenger Address System
The passenger address system allows both pilots and flight attendants to make
announcements to the passengers.
Cabin speakers are installed in the passenger service unit above each passenger seat.
Additional speakers are installed in the lavatories and the galley(s). Volume of the
cabin speakers is automatically adjusted for engine background noise.
Pressing in the PA button on the handset cradle and pressing the PTT switch in the
handset allows either flight attendant to make an announcement on the PA system.
The announcement will interrupt any entertainment system that may be operating. To
ensure priority access to the system, all other PA transmissions are overridden when
the pilot pushes the PA switch on the intercom control panel.
E. Intercom Control Panel
The intercom control panel is located on the centre pedestal and is used to select one
of four communication modes. When a button is pressed the labeled mode is activated
and any previous mode is deactivated.
To make an announcement from the flight compartment:
S Set the audio control panel rotary transmit selector to PA
S Press the PA pushbutton on the intercom control panel
S Use any press to talk switch to transmit
The PA indicator light on both flight attendant handset cradles will illuminate (green)
and the PA pushbutton on the intercom control panel will illuminate (green).
Pressing the CHIME pushbutton, only sounds a high-low chime in the passenger
compartment (there are no indicator lights for this action).
When the CALL is pressed, it illuminates green and sounds a high-low chime in the
passenger compartment. The green FLT indicator light on both flight attendant’s
handset cradles illuminate and a red light comes on in the mid-cabin overhead exit sign.
The EMER button is used to notify the flight attendants of an in--flight emergency.
When activated, the EMER indicator light, on the intercom panel, flashes (amber) and
a high-low chime sounds. In the passenger compartment, The amber EMG light, at
both flight attendant stations, flashes on the handset cradles and a red light flashes on
the mid-cabin overhead exit sign.
Vol. 1 05--20--9
COMMUNICATIONS
Audio Integrating System REV 3, May 03/05
Flight Crew Operating Manual
CSP C--013--067
CKPT Intercom Control Panel
Figure 05--20--6
PA
Used to address
passengers in cabin.
Green -- Indicates in use.
EMER
Used for emergency call
on cabin interphone
system.
Flashing (amber) --
Indicates emergency
call to flight attendants.
Intercom Control Panel
Center Pedestal
CALL
Used to sound chime and enable
intercom with flight attendant.
Green -- Indicates call to flight
attendants.
CHIME
Used to sound chime
cabin speakers.
F. Passenger Service Units
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