Aeroplane Systems: DEU A and DEU B

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What is the primary function of the DEU-B in the CIDS?

To control and monitor various cabin support systems

To control the aircraft's aerodynamics

To control the Area Call Panels, Attendant Indication Panels, and other systems (correct)

To power the aircraft's turbine

What determines which inputs/outputs are used on each DEU-B?

The installation of optional systems and cabin layout (correct)

The altitude of the aircraft

The number of passengers on board

The type of aircraft

What is the purpose of the coding switches on each DEU-B connection box?

To provide power to the DEU-B

To connect the DEU-B to the CIDS data bus

To give the installation address of the DEU-B (correct)

To monitor the aircraft's turbine

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 Signup and view all the answers

What is the purpose of the Forward Attendant Panel (FAP)?

To control and monitor various cabin support systems Signup and view all the answers

What is found at the end of each DEU-B chain?

A Bus Termination Resistor (BTR) Signup and view all the answers

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 Signup and view all the answers

What is the data rate of the Cabin Connector?

Up to 100 Mbps Signup and view all the answers

Which system does the Cabin Network System NOT interface with?

Aircraft Engine Control System Signup and view all the answers

What is the purpose of the Passenger Air-to-Ground Telephone/Fax System?

To enable passengers to fax during flight Signup and view all the answers

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 Signup and view all the answers

What type of capability should Personnel Electronic Devices (PEDs) have to connect to the cabin wireless system?

IEEE 802.3 Signup and view all the answers

What is the Satellite Communication system used for in the Passenger Air-to-Ground Telephone/Fax System?

To enable transmission to the ground Signup and view all the answers

What is the function of the fax machine in the Cabin Network System?

To establish voice and data connections to the public telephone network Signup and view all the answers

What is the frequency range of the RF signals operated by the antenna CWLU?

2.4 to 2.5 GHz Signup and view all the answers

What is the primary function of the Cabin Network Server Unit (CNSU) in the CNS?

To process and store data and files Signup and view all the answers

What is the purpose of the Centralised Maintenance Computer (CMC) in the CNS?

To monitor the system integrity and provide defect reports Signup and view all the answers

What is the function of the Cabin Wireless LAN Unit (CWLU) in the CNS?

To supply the aircraft cabin with a wireless network Signup and view all the answers

What happens to the NS, FSB, and EXIT signs in the event of a rapid decompression?

They come on automatically. Signup and view all the answers

How does the CIDS control cabin illumination?

Through push-button switches on the FAP. Signup and view all the answers

What triggers the EVAC signalling system?

Either the cockpit EVAC panel or the FAP or AAP. Signup and view all the answers

What is the function of the DEU-As?

To activate passenger signs. Signup and view all the answers

How does the Cabin Pressure Controller respond to a rapid decompression?

It provides a discrete signal to the DIR. Signup and view all the answers

What is the function of the Decoder/Encoder Unit Type-A in an aircraft?

To control passenger-related systems Signup and view all the answers

What is the purpose of the aural signal in the EVAC signalling system?

To signal the start of an evacuation. Signup and view all the answers

How many DEU-As are installed in the A380's baseline configuration?

85 Signup and view all the answers

What connects the DEU-As to the DIRs?

A CIDS data-bus Signup and view all the answers