DIN EN 62056-42 : 2003

1 Scope
2 Normative references
3 Terms, definitions and abbreviations
4 Overview
5 Service specification
  5.1 List of services
      5.1.1 Connection establishment/release related services
      5.1.2 Data communication services
      5.1.3 Layer management services
  5.2 Use of the physical layer services
  5.3 Service definitions
      5.3.1 PH-CONNECT.request
      5.3.2 PH-CONNECT.indication
      5.3.3 PH-CONNECT.confirm
      5.3.4 PH-ABORT.request
      5.3.5 PH-ABORT.confirm
      5.3.6 PH-ABORT.indication
      5.3.7 PH-DATA.request
      5.3.8 PH-DATA.indication
6 Protocol specification
  6.1 Physical layer protocol data unit
  6.2 Transmission order and characteristics
  6.3 Physical layer operation - description of the procedures
      6.3.1 General
      6.3.2 Setting up a physical connection
      6.3.3 The identification service
      6.3.4 Data communications
      6.3.5 Disconnection of an existing physical connection
Annex A (informative) An example: PH service primitives and Hayes
        commands
Annex B (informative) Data model and protocol
Annex ZA (normative) Normative references to international
         publications with their corresponding European
         publications
Bibliography

Describes the physical layer services and protocols within the Companion Specification for Energy Metering (COSEM) three-layer connection oriented profile for asynchronous data communication. The document does not specify physical layer signals and mechanical aspects. Local, implementation-specific issues are also not specified.