30 Questions
What is the main function of the Decoder/Encoder Unit Type-A?
To control passenger-related systems
How are the DEU-As connected to the DIRs?
Through a CIDS data-bus
What is the primary function of the CIDS system in commercial aircraft?
To control and display cabin functions for passengers and crew
What is the purpose of the two top line data buses on each side of the cabin?
To provide a backup system in case of failure
What is the purpose of the Decoder/Encoder Unit in the CIDS system?
To decode and encode data for transmission and reception
How are the DEU-As addressed?
Through coding switches
What is found at the end of each chain of DEU-As?
A Bus Termination Resistor (BTR)
What is the redundancy feature in the CIDS Director system?
Having two identical directors, one active and one in hot-standby mode
What is the function of the crosstalk bus in the CIDS Director system?
To check the results of both directors and ensure correct output
How many DEU-As are installed in the A380's baseline configuration?
85
What is the component that receives the same inputs as the CIDS Director and processes the information?
The other CIDS Director in hot-standby mode
What is the component that contains the Onboard Replacement Module (OBRM) in the CIDS system?
CIDS Director
Which component is connected to the active DIR?
Cockpit handset
What is the primary function of the Passenger Address system?
To supply one-way voice communication for announcements
What is achieved through the CIDS communication links?
Passenger address and integrated pre-recoded announcement/boarding music
How are announcements initiated from the cockpit?
Using either a handset or acoustic devices
What system can the CIDS be interfaced with?
Pre-recorded voice announcements and the boarding music system
What is broadcasted over all PA loudspeakers?
The announcement made by pressing the PTT switch
What feature is added to the fax machine beyond normal telephone functionality?
Credit card reader
What system is the telephone system connected to via the PESC and CTU?
Satellite Communication System
What is the function of the System Control/Interface Module?
All of the above
What is required to reconfigure the cabin layout in the CIDS?
A change to the software database
What information does the Passenger Visual Information System provide to passengers?
Flight and destination data
What is the purpose of the access code in the CIDS cabin layout selection function?
To restrict access to authorized personnel
How are the modes of Airshow operation set?
From the Cabin Management Terminal
Where can the cabin programming modes be accessed?
Both on the ground and in flight
What type of data is provided to passengers through the Passenger Entertainment System Video display units?
Aircraft position data on maps
What is the purpose of Field Loadable Software (FLS)?
To load software updates
What is the function of the Built-In Test Equipment (BITE) circuitry?
To detect faults in the connected systems
What is the purpose of the access code in the cabin programming modes?
To restrict access to authorized personnel
Study Notes
Telephone and Fax System
- The fax machine provides normal telephone functions with additional features like a credit card reader and LCD display.
- The telephone system is connected to the Satellite Communication System (SATCOM) via the Passenger Entertainment System Controller (PESC) and the Cabin Telecommunication Unit (CTU).
- The System Control/Interface Module has master control of communication between the fax, credit card reader module, and bearer system.
Passenger Visual Information System (PVIS)
- The PVIS supplies passengers with in-flight visual information through the Passenger Entertainment System (PES) video display units.
- PVIS provides real-time flight and destination data, including aircraft position data on maps and aircraft status data as text.
- Modes of Airshow operation are set from the Cabin Management Terminal (CMT).
Decoder/Encoder Units (DEU)
- DEU-A interfaces with the active DIR to control passenger-related systems, such as Passenger Service Units (PSU), PAX lighted signs, PAX-call lights, and loudspeakers.
- DEU-A interfaces with the Cabin Intercommunication Data System (CIDS) via a data bus.
- DEU-A is connected to the DIRs through a CIDS data bus, with two top-line data buses on each side of the left, centre, and right seat aisles for redundancy.
- DEU-As are interchangeable and have installation addresses given through coding switches installed in each DEU-A connection box.
Cabin Intercommunication Data System (CIDS)
- CIDS is a microprocessor-based system that controls and displays cabin functions for passengers and crew.
- CIDS components include CIDS Director (DIR), Decoder/Encoder Unit A (DEU A), Decoder/Encoder Unit B (DEU B), Forward Attendant Panel (FAP), Additional Attendant Panel (AAP), and Area Call Panel (ACP).
CIDS Director (DIR)
- DIR is the central control and interface component of CIDS.
- There are two identical DIRs, one active and one in hot-standby mode, for redundancy.
- Each DIR receives the same inputs and processes the information, with results checked via a crosstalk bus.
Communication Functions
- CIDS Communication Links include passenger address and integrated pre-recoded announcement/boarding music, cabin interphone, and service interphone.
- Passenger Address (PA) system supplies one-way voice communication for announcements from the cockpit or cabin crew station to passengers.
Cabin Programming and Warnings
- CIDS cabin layout selection function allows reconfiguration without complex hardware changes.
- Cabin programming modes are available on ground or in flight, protected by an access code.
- CIDS warnings are provided through Built-In Test Equipment (BITE) circuitry in DIRs, DEUs, FAP, AAPs, and AIPs, allowing detection of faults in connected systems.
Learn about the Cabin Intercommunication Data System (CIDS) used in Airbus commercial aircraft. This microprocessor-based system controls and displays cabin functions for passengers and crew. Test your knowledge of CIDS and its role in cabin management.
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