Electrical installation and wiring
98-145168-A Chapter 4: Installation 4-15
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Description of the fault/health reporting
The CSDU communicates Built-In Test Equipment (BITE) reporting to the aircraft
Centralized Fault Display System (CFDS) or Central Maintenance Computer (CMC).
4.3.13 To wire Ethernet 1 (AISD#1 or EFB 1)
ARINC-781 compliant.
• Ethernet Port Definition: Electronic Flight Bag 1
• Security Domain: Airline Information Services Domain (AISD)
Ethernet 11 (AISD#2):
Wiring diagram
See Wiring – overview on page 4-7
Pins for Ethernet 1 (AISD#1 or EFB 1)
Description of Ethernet 1 (AISD#1 or EFB 1)
The EFB 1 interface is for cockpit (AISD) applications which require an IP data connection,
for example for EFB connectivity.
4.3.14 To wire Ethernet 11 (AISD#2 or EFB2)
The Ethernet 11 interface is ARINC-781 compliant, but reserved for flight test use only and
disabled for general use.
• Ethernet Port Definition: Electronic Flight Bag 2
• Security Domain: Airline Information Services Domain (AISD)
Wiring diagram
See Wiring – overview on page 4-7
MP08J Data to CFDS A
MP08K Data to CFDS B
CSDU pin Description
CSDU pin Description
TP03A Ethernet 1 from CSDU to User + (AISD#1)
TP03B Ethernet 1 from User to CSDU + (AISD#1)
TP04B Ethernet 1 from CSDU to User - (AISD#1)
TP04A Ethernet 1 from User to CSDU - (AISD#1)
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