EN 50090-2-1:1994

Foreword
1 Scope
2 Normative references
3 Definitions
3.1 Definitions from EN 27498
3.2 Additional definitions
4 HBES reference model
4.1 Communication
4.1.1 Physical Layer
4.1.2 Data Link Layer
4.1.3 Network Layer
4.1.4 Transport Layer
4.1.5 Session Layer
4.1.6 Presentation Layer
4.1.7 Application Layer
4.1.8 Medium Aspects
4.2 Application
4.3 Management
4.3.1 System management
4.3.2 Application management
5 Reference points and functional groupings
5.1 General concept
5.2 Specific reference points and functional groupings
6 Standardization of interfaces at specific
       reference points
6.1 Media interface
6.2 Universal interface
6.3 Process interface
6.4 Interfaces at reference point E
7 System aspects
7.1 Network topology
7.2 Interapplication
7.3 Grouping
7.4 Access

This European Standard specifies the general features and architecture of the HBES. The object is to define new terms for use in the EN 50090 series, to give general information and advice on the required HBES features and its architecture; to specify the HBES model; to specify the basic functional structure of an HBES with its reference points and interfaces