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 The signal is also transmitted from the director to the In Flight Entertainment Rack (IFE).

R **ON A/C 106-149, 301-399, 401-499,
 On the Audio Control Panel (ACP) in the cockpit these functions can be selected:
 -PA from AMU: If you push the PA button, it starts a link between the equipment connected to the AMU and all loudspeakers.
 (c) PA announcement from attendant handset During a PA announcement from the attendant handset, the audio signal is transmitted through the DEU type B to the director. From the director the signal is transmitted on the same way as described for the cockpit equipment.

R **ON A/C 106-149, 401-499,
 These functions are available with the handset:
 -DIRECT PA: If you push the PTT button, it starts a link between the handset and all loudspeakers.
 -PA ALL: R If you push the PA button followed by the ALL button, it starts R a link between the handset and all loudspeakers in the cabin
 area.
 **ON A/C 301-399,
 These functions are available with the handset:
 -DIRECT PA: If you push the PTT button, it starts a link between the handset and all loudspeakers.
 -
PA ALL: If you push the PA ALL button, it starts a link between the handset and all loudspeakers in the cabin area.

 -
PA 1: If you push the PA FWD button, it starts a link between the handset and all loudspeakers in the forward cabin area.

 -
PA 2:

R 1EFF : 106-149, 301-399, 401-499, 1 23-73-00Page 97 1 1 Config-2 Aug 01/05 1 1 1CES 1 If you push the PA AFT button, it starts a link between the handset and all loudspeakers in the aft cabin area.

R **ON A/C 106-149, 301-399, 401-499,
 (d)
 Functional priorities The PA functions have different priorities. The PA function with the higher priority overrides the function with lower priority. The function priority levels are given in this table:

 -1. DIRECT PA and PA from AMU,
 -2. all remaining PA functions,

 (e)
 Source priorities The PA sources have different priorities. A source with higher PA priority interrupts a PA announcement from a source with lower priority. Only the announcement from the source with the higher priority is heard. Only if an announcement with higher functional priority is done, from the source with the lower priority, it interrupts the source with higher PA priority.

R **ON A/C 106-149, 401-499,
 The sources have the following priorities:
 -1. AMU,
 -2. cockpit handset,
 -3. attendant handsets.
 **ON A/C 301-399,
 The sources have the following priorities:
 -1. AMU,
 -2. Cockpit handset,
 -3. FWD ATTND handset,
 -4. Attendant handsets,
 -5. PRAM,
 -6. EVAC,
 -7. Video,
 -8. Boarding Music.
 (f) PA monitoring If the cockpit handset is removed from the craddle, the PA monitoring function is activated. The PA announcement with the highest priority, which is done by another source, is heard in the handset.
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 The cockpit crew can monitor the PA announcements through the AMU as long as no other function is selected on the AMU and the PA rotary switch is activated and turned clockwise on the ACP.
 (g) Reset of selected PA functions If the PA function is initiated by the handset functional keys, the function is cancelled after you put the handset back on the cradle or you pushed the reset button on the handset. If the function is initiated with the PTT button, release of the PTT button cancels the function.
 **ON A/C 301-399,
 (h) Attention chimes A PA-attention-chime (LO-HI-LO) sounds through the loudspeakers in the related cabin area and in the related attendant area when a PA call is selected at: AMU (Audio Management Unit) Cockpit Handset Attendant Handset

R **ON A/C 106-149, 301-399, 401-499,
 (i)
 PA indications Dial and status information related to PA system functions is displayed on the related Attendant Indication Panel (AIP).

 (j)
 Gain adjustment If low cabin-pressure occurs or engine operate (high oil-pressure) the volume of a PA announcement is increased. The volume is also increased if a data bus failure (top line) occurs. If during a PA the cockpit door is open, the volume of the PA in the cockpit door area decreases. This will prevent acoustic feedback.

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R **ON A/C 106-149, 401-499,
　
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