NBN EN 13149-1 : 2004

Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Typical structure of the network
  4.1 Outline functions of the network
  4.2 Diagram of preferred implementation
5 Specifications for the on-board data transmission system
  5.1 Data transmission bus
  5.2 General rules
      5.2.1 Introduction
      5.2.2 Network medium
      5.2.3 Transmission speed
      5.2.4 Coupling mode
      5.2.5 Redundant media
      5.2.6 Network configuration rules
      5.2.7 Encoding
      5.2.8 Turnaround time
      5.2.9 Waiting time at the bus arbiter level for an answer
      5.2.10 Jabber inhibit
      5.2.11 Connectors
      5.2.12 Cables
  5.3 Conformance Class
  5.4 Bus Arbiter
  5.5 Presence Variable
Annex A (informative) CEN/TC 278 Internal report on requirements
        for on board transmission between equipment
Bibliography

Describes the choice and the general application's rules of an onboard data transmission bus between the different equipment for service operations and monitoring of the fleet.