Table of Contents
1Introduction
1.1Scope
1.2Purpose
1.3ApplicationofthisRecommendation
2References
3Abbreviations
4Definitions
4.1Availability
4.2End-to-endpaths
4.3Pathelements
4.4Pathelementcategories
4.5Performancelevelcategories
5Lengthcategories
6Availabilityparameters
6.1Availabilityratioandunavailabilityratio
6.2Meantimebetweenoutagesandoutageintensity
7Availabilityobjectives
7.1End-to-endavailability
7.2End-to-endobjectives
7.3Availabilityobjectivesforpathelements
8Relatedavailabilityparameters
AnnexA-Examplesofpathtopologiesandend-to-endpath
availabilitycalculations
A.1Purpose
A.2Pathtopologies
A.3End-to-endunavailabilitycalculations
A.4Large-scaletelecommunicationnetworks
AppendixI-Bibliography
AppendixII-Calculationsandservicelevelssupportingthe
end-to-endavailabilityobjectives Abstract
Defines network performance parameters and objectives for the path elements and end-to-end availability of international constant bit-rate digital paths. These parameters are independent of the type of physical network supporting the end-to-end path, e.g., optical fibre, radio relay or satellite.
