30 Questions
What is the primary function of the DEU-B in the CIDS?
To control the Area Call Panels, Attendant Indication Panels, and other systems
What determines which inputs/outputs are used on each DEU-B?
The installation of optional systems and cabin layout
What is the purpose of the coding switches on each DEU-B connection box?
To give the installation address of the DEU-B
What happens if one connection box is not connected to the CIDS data bus?
The data bus will be interrupted and a related message will be shown
What is the purpose of the Forward Attendant Panel (FAP)?
To control and monitor various cabin support systems
What is found at the end of each DEU-B chain?
A Bus Termination Resistor (BTR)
What is the primary function of the antenna in the Cabin Network System?
To receive signals from wirelessly connected devices and transmit them to the CWLUs
What is the data rate of the Cabin Connector?
Up to 100 Mbps
Which system does the Cabin Network System NOT interface with?
Aircraft Engine Control System
What is the purpose of the Passenger Air-to-Ground Telephone/Fax System?
To enable passengers to fax during flight
What is the primary function of the Ethernet Switch Unit (ESU) in the CNS?
To control the interfaces between the Cabin Network System units and devices
What type of capability should Personnel Electronic Devices (PEDs) have to connect to the cabin wireless system?
IEEE 802.3
What is the Satellite Communication system used for in the Passenger Air-to-Ground Telephone/Fax System?
To enable transmission to the ground
What is the function of the fax machine in the Cabin Network System?
To establish voice and data connections to the public telephone network
What is the frequency range of the RF signals operated by the antenna CWLU?
2.4 to 2.5 GHz
What is the primary function of the Cabin Network Server Unit (CNSU) in the CNS?
To process and store data and files
What is the purpose of the Centralised Maintenance Computer (CMC) in the CNS?
To monitor the system integrity and provide defect reports
What is the function of the Cabin Wireless LAN Unit (CWLU) in the CNS?
To supply the aircraft cabin with a wireless network
What happens to the NS, FSB, and EXIT signs in the event of a rapid decompression?
They come on automatically.
How does the CIDS control cabin illumination?
Through push-button switches on the FAP.
What triggers the EVAC signalling system?
Either the cockpit EVAC panel or the FAP or AAP.
What is the function of the DEU-As?
To activate passenger signs.
How does the Cabin Pressure Controller respond to a rapid decompression?
It provides a discrete signal to the DIR.
What is the function of the Decoder/Encoder Unit Type-A in an aircraft?
To control passenger-related systems
What is the purpose of the aural signal in the EVAC signalling system?
To signal the start of an evacuation.
How many DEU-As are installed in the A380's baseline configuration?
85
What connects the DEU-As to the DIRs?
A CIDS data-bus
Why are there two top line data buses on each side of the left, centre, and right seat aisles?
For redundancy purposes
What is installed in each DEU-A connection box?
Coding switches
What is contained in the end connection box of each chain?
A Bus Termination Resistor (BTR)
This quiz covers the basics of Decoder/Encoder Unit Type-A (DEU-A) and its role in controlling passenger-related systems in an aircraft. Learn about the components and functions of DEU-A and how it interfaces with other systems.
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