ABSTRACT
The Aeronautical Radio Inc (ARINC) 629 communication network was the answer in aerospace to the request of integrated system-level buses. ARINC 629 uses current coupling for an electrical physical connection avoiding error-prone physical connections. ARINC 629 physical layer specifies the functional, electrical/optical, and mechanical characteristics of the physical layer entities. This chapter describes the two main functions associated with the ARINC 629 data link control procedure to be performed in the medium access sublayer: the media access management and data encapsulation. It explains the description of the ARINC 629 CP closely on an excellent description from Gallon and others. ARINC 629 supports three different physical entity types as part of its physical layers: a current mode bus, a voltage mode bus, and a fiber-optic mode bus. For the flight control ARINC 629, LRUs receive data on all three ARINC 629 buses but transmit on only one ARINC 629 bus.
