CONTENTS - ITU-T RECOMMENDATION

1     Introduction
        1.1     Purpose
        1.2     Scope
        1.3     Related Recommendations
2     References
3     Abbreviations
4     Method for availability specification
        4.1     Definition of Availability
        4.2    Availability model
        4.3     Definition of Unavailability Entry/Exit Criteria
        4.4     Availability parameters
                  4.4.1     Availability Ratio
                  4.4.2     Mean Time Between Outages
5     B-ISDN ATM semi-permanent connection portions
6     Availability performance objectives
        6.1     Availability Ratio
        6.2     Mean Time Between Outages
Annex A – Sampling estimation of B-ISDN ATM semi-permanent availability parameters
        A.1     In-service estimation of SES_ATM
                  A.1.1     Network perspective of SES_ATM
                  A.1.2     Service perspective of SES_ATM
        A.2     In-service estimation of availability parameters
                  A.2.1     Service availability sampling
Annex B – Related availability parameters
        B.1     Unavailability Ratio
        B.2     Outage Intensity
Annex C – Calculation of end-to-end availability performance
        C.1     Purpose
        C.2     End-to-end availability calculations