-MID attnd call: If you push the MID ATTND button, it starts an interphone connection between the calling station and the MID attendant station in the cabin.
-EXIT attnd call: If you push the EXIT ATTND button, it starts an interphone connection between the calling station and the EXIT attendant station in the cabin.
-AFT attnd call: If you push the AFT ATTND button, it starts an interphone connection between the calling station and the AFT attendant station in the cabin.
R **ON A/C 106-149, 301-399, 401-499,
(d)
Functional priorities The functions have different priorities. Every function will override a function with a lower priority:
-1. EMERGENCY CALL
-2. CALLS FROM COCKPIT
-3. ALL ATTENDANT CALL
-4. NORMAL CALL
(e)
Source priorities The interphone sources have different priorities. A source with higher priority interrupts a link to an interphone station with a lower priority. A source with lower priority that selects a function with higher priority also interrupts an existing link. The sources have these priorities:
-1. AMU (cockpit)
-2. cockpit handset
-3. attendant handsets
(f)
Reset of selected interphone functions A call started from the Call Panel in the cockpit is cancelled, when all requested handsets reset the function. The function is automatically cancelled, after 2 minutes, when the interphone function was not activated. It is also automatically cancelled after approx. 5 minutes, when the interphone function was activated but no requested handset has accept the call. An interphone function is reset when you put the handset back on the cradle or after you push the reset button on the handset.
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R **ON A/C 106-149, 401-499,
R R R (g) Call chime You hear a chime from all cabin loudspeakers. When an attendant call comes to the cockpit, the Flight Warning Computer (FWC) generates a buzzer sound (aural annunciation) which comes from the cockpit loudspeakers. The FWC receives the related signal from the active CIDS director.
**ON A/C 301-399,
R R (g) Call chime When an attendant call comes to the cockpit, the Flight Warning Computer (FWC) generates a buzzer sound (aural annunciation) which comes from the cockpit loudspeakers. The FWC receives the related signal from the active CIDS director.
R **ON A/C 106-149, 301-399, 401-499,
(h) Indications For visual call indication a call message shows on the AIP and the related ACP light segment comes on. In the cockpit the related call indicator on the Cockpit Call Panel and the call indicator at the AMU come on for call annunciation.
(4) Service Interphone System
**ON A/C 301-399,
(Ref. Fig. 034)
R **ON A/C 106-149, 301-399, 401-499,
(a) General The service interphone system allows the telephone communication between ground crew, cockpit crew and cabin crew. (Ref. 23-44-00)
R 1EFF : 106-149, 301-399, 401-499, 1 23-73-00Page A5 1 1 Config-2 Aug 01/05 1 1 1CES 1
Service Interphone - Block Diagram
Figure 034
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(b) Activation of the Service Interphone link
The CIDS enables the communication between the service interphone
jacks and the communication equipment in the cockpit and in the
cabin.
When the landing gear is extended and compressed for more than 10
seconds a link is automatically made from the director to the
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