1 Scope
2 References
3 Abbreviations
4 Definitions
5 ITU‑T I.732 Annex D formal model
5.1 Symbols and diagrammatic conventions
5.2 Functional modelling rationale
6 Overview of equipment functions
6.1 Transfer functions
6.2 Layer Management functions
6.3 ATM Equipment Management Function (AEMF)
6.4 Message Communications Function
6.5 Coordination function
6.6 Connection Admission Control (CAC) function
6.7 Signalling Application
6.8 Timing function
6.9 Interworking functions
7 Connection types and characteristics
7.1 Connection types
7.1.1 Point-to-point connections
7.1.2 Point-to-multipoint connections
7.1.3 Multipoint-to-point connections
7.1.4 Multipoint-to-multipoint connections
7.1.5 OAM aspects of multipoint connections
7.2 Methods of establishing connections
7.2.1 Permanent Virtual Connections (PVC)
7.2.2 Switched virtual connections
7.3 Transfer Capabilities
8 OAM functions
8.1 OAM naming conventions for ATM
8.2 OAM procedures
8.2.1 AIS application
8.2.2 RDI application
8.2.3 CC application
8.2.4 LB application
8.2.5 Performance Management application
9 Protection switching and restoration
9.1 Trail VP and VC individual protection (1+1/1:1 trail)
9.2 Segment VP and VC individual protection (1+1/1:1 SNC/S)
9.3 Subnetwork VP and VC individual protection (1+1 SNC/N)
9.4 Trail VP and VC group protection (1+1/1:1 trail/T)
9.5 Subnetwork VP and VC group protection (1+1/1:1 SNC/T)
10 Traffic measurement functions
10.1 Traffic information collection
10.1.1 TP usage measurement
10.1.2 ATM cell level procedure performance information collection
10.1.3 VP and VC traffic load information collection
10.1.4 VP and VC
UPC/NPC information collection
10.1.5 Call level information collection
11 Generic performance requirements
11.1 Quality of Service aspects
11.2 ATM Network Element performance objectives
11.2.1 Cell loss objectives, cell transfer objectives and CDV objectives
11.2.2 Semi-permanent connection availability
11.2.3 Call processing performance
12 Timing and synchronization requirements
12.1 User plane related timing
12.1.1 Timing accuracy
12.1.2 Equipment timing source
12.1.3 Timing of the TP layers
12.2 Management of plane related timing
13 Availability and reliability
13.1 Availability objectives
13.2 Data integrity
13.3 Upgrade
13.3.1 Hardware upgrade
13.3.2 Software upgrade
13.4 Start-up requirements
Appendix I - ATM
layer cell transfer performance
Appendix II -
Bibliography
Introduction
This Recommendation gives an overview of the functions of ATM equipment,
examples of overall characteristics and objectives for ATM network elements.
The general characteristics of ATM equipment may be described by using the
functional partitioning of the network element into logical functions linked by
internal communications between the functions. A general methodology which may
be used to clarify the different types of ATM equipment is also contained in
ITU‑T I.732.
The grouping of functional functions in accordance with the B-ISDN Protocol
Reference Model and the detailed modelling methodology of ITU‑T I.326
enables the description of any ATM equipment to the required level of detail.