ANSI CTA 709.2-A-2000 pdf download Control Network Power Line (PL) Channel Specification
1.2 Scope
This specification contains all the information necessary to facilitate the exchange of data and control information over the power line medium within a home. The document is divided into five sections (1 – 5):
1. An introduction to the specification.
2. A general description of the power line network that is likely to exist in home environments.
3. The specifications of the allowed topology and configuration rules for constructing EIA-709.2 compliant networks in homes.
4. A specification of the EIA-709.2 physical medium. This section covers frequency allocation, physical and electrical specification of the medium, connectors, environmental requirements, and installation considerations.
5. The physical layer specification of an EIA-709.2 compliant node. This section covers the interface to the higher ISO layers, control channel signal characteristics, encoding, transmitter and receiver and signal coupling characteristics.
The EIA-709.2 specification establishes a minimal set of rules for compliance. It does not rule out extended services to be provided, given that the rules are adhered to within the system. It is the intention of the standard to permit ex- tended services (defined by users) to coexist.
Certain aspects of the standard are defined in other documents. These documents are referenced where relevant. In the case where a referenced standard conflicts with this document, this document will prevail.
1.3 Definitions and Abbreviations
The following definitions and abbreviations deal specifically with the power line medium and physical layer shown in figure 1. A more complete set of definitions will be found in EIA-709.1-A.
PL Node – A user node attached to the power line medium at a tap that meets the requirements of this specification.
Home Network – A single power line bus contained within one home. That part of a power line network defined to be from the power line service entrance (including a breaker panel) to all local home loads.
Line Cord – A cable not part of the power line network that allows an EIA-709.2 node located away from the power line network to be connected to the network.
Power Line Network – A communication network based on power distribution lines (“power lines”), from the final distribution transformer to and including all homes served by that transformer, including all wiring in those homes.
Non-Network-Powered Node – An EIA-709.2 compatible node that attaches to the power line network but does not draw any power from the network.
1.4 Relation of Specification to the EIA-709 Model
The EIA-709 specification model is based on the OSI Reference Model. It is a 7-layer model. There are also important extensions to the OSI Reference Model.
Figure 1 shows the scope of the EIA-709.2 specification in reference to the entire EIA-709 model. In this document,only the parts of the model relevant to power line communication are specified. Anything outside this boundary is covered in other parts of the standard. Similar specifications exist for other EIA-709 media.