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 (4) Flight Attendant Panel (FAP) 
R  **ON A/C 106-149, 401-499,
 (Ref. Fig. 018)
 **ON A/C 301-399,
 (Ref. Fig. 018A) 
R  **ON A/C 106-149, 301-399, 401-499,
 The FAP is used to control different cabin systems and the CIDS, to indicate the status of different systems and for on-board changes of the CAM data (e.g. cabin layout and no smoking zones). It can also be used for emulation of CFDS reports when the aircraft is in the ground status.
 (a) The FAP has data bus interfaces to the: - Director 1, - Director 2,
R  (b) The FAP has discrete interfaces to the: - Director 1, - Director 2, - Emergency lighting system.
 **ON A/C 301-399, 
R  - In Flight Entertainment System (IFE). 
R  **ON A/C 106-149, 301-399, 401-499,
 (c) Integrated memory cards In the front face of the FAP two memory cards are integrated. These cards are the:
 1_ On Board Replaceable Module (OBRM): The OBRM is a removable memory card which contains the system software. Major changes of the CIDS software are done by a replacement of the OBRM. 

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 FAP Interfaces - Block Diagram
 Figure 018

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 FAP Interfaces - Block Diagram
 Figure 018A

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 2_ Cabin Assignment Module (CAM):
 The CAM is the second plug-in memory card which defines many
 of the system properties and all cabin layout and zoning
 information (e.g. if chimes accompany a PA announcement and if
 a loudspeaker is for an attendant or for a PAX announcement).
 Minor CAM data are changed by on-board programming, major CAM
 data are changed by replacement of the CAM with a reprogrammed
 CAM.

 (5)
 Build-In Test Equipment (BITE) The CIDS is designed to continuously monitor its own performance and that of the connected equipment. The CIDS Directors (DIRs), Decoder/Encoder Units (DEUs), Passenger Interface and Supply Adapters (PISAs), Flight Attendant Panel (FAP), Additional Attendant Panels (AAPs) and Attendant Indication Panels (AIPs) contain comprehensive BITE circuitry. This allows the CIDS to detect faults in the connected systems and in the CIDS units. The DIRs store the detected faults and send them to the Warning and Maintenance System (WMS) and/or FAP. In the event of a major fault, related information is additionally sent to the

 -
ECAM Status Page or

 -
ECAM Warning Page.

 (6)
 Interfaces The CIDS components are connected to each other and to the other systems by these types of interfaces:

 (a)
 Discretes The discrete interface is an unidirectional interface which transmits a 28VDC or ground signal.

 (b)
 Audio The audio interface is an unidirectional interface. It transmits signals between 50Hz - 11kHz if connected to a DEU type A and 200Hz - 5.5kHz if connected to a DEU type B.

 (c)
 Data bus The data bus interface is an unidirectional or bidirectional interface:

 1 Unidirectional interfaces
_ CIDS uses three different unidirectional interfaces for data-transmission:
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 a_ ARINC 429
 This data bus transmits 32-bit data words. The bus operates
 as a lowspeed (12KB/sec) or highspeed interface
 (100KB/sec).

_ This data bus transmits 8-bit data words with 9600B/sec.
 c CAN
_ This data bus operates as a highspeed interface with a speed of 83.33KB/sec. It has a CAN bus terminator installed.
 2 Bidirectional interfaces
_ CIDS uses the CIDS buses (Top Line and Middle Line) and the Ethernet for bidirectional transmissions.
 a Top Line and Middle Line
_ These buses transmit data between director and all Decoder/Encoder Units (DEUs). The busses transmit 14 bit data words with 4MB/sec.
 b Ethernet
_ This bus transmits data words with 10MB/sec.
 C. System Functions
 The CIDS provides these system functions:
 (1)
 Passenger Address System (PA) The passenger address system does the distribution of announcements from the cockpit and each attendant station through all assigned PAX loudspeakers.
　
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