This document defines the electrical characteristics, protocol, and data content for a data bus used with seat end electronics equipment. This document defines a mandatory command set and an optional command set.

This document describes functional requirements of the seat end equipment as they relate to the communication over the bus. However, this document is not a complete functional specification of the seat end equipment.

This document does not define the equipment environmental requirements or the physical description of the equipment. This document does not define the IFE system architecture, design, or operation.

Purpose

The ARINC Specification 628, Cabin Equipment Interfaces (CEI), document is comprised of several parts. Part 1 defines the head end equipment (source units). Part 2 defines the seat end equipment. Part 3 defines the airplane systems to In-Flight Entertainment (IFE) systems interfaces. Part 4 defines the Cabin Distribution System (CDS).

This document specifies the ARINC 485 control protocol used by the Line Replaceable Units (LRUs) described in ARINC Specification 628, Part 2.