ITU X.147:2003
ITU X.147:2003 Frame Relay Network Availability Defines network performance parameters, objectives and measurement methods for describing the availability of Frame Relay networks.
Table of Contents
1Scope2References
3Definitions
4Abbreviations
5Conventions
6GeneralFrameRelayperformancereferencemodel
6.1FrameRelayvirtualconnectionportionsandmeasurement
points
7Methodforspecifyingavailability
7.1Generaldefinitionofavailability
7.2Availabilitymodel
7.3Definitionofavailable/unavailablestate
7.4Methodsforassessingavailability
7.5Availabilityparameters
8Availabilityperformanceobjectives
8.1AvailabilityRatio
8.2MeanTimeBetweenOutages
AnnexA-Determiningavailabilitystatesbyuseofperformance
parameterthresholds
A.1FrameRelayvirtualconnectionavailability
AnnexB-UseofFrameRelaySTATUSMessagesorAlarmIndication
asavailabilitycriteria
AnnexC-UseofFROAMnon-latchingloopbackmessagesfor
estimationofFrameRelayconnectionavailabilitywhen
usingconnectivityastheoutagecriteria
C.1Introduction
C.2Thedeclarationfromconnectionavailabletoconnection
unavailable
C.3Thedeclarationfromconnectionunavailabletoconnection
available
C.4In-serviceestimationofavailability
AnnexD-UseofFROAMtomonitorFrameLossRatioinorderto
assessavailability
AnnexE-CalculationofMeanNetworkAvailabilityRatiobased
onthemeasurementofindividualVirtualConnection
Unavailability
AppendixI-SamplingestimationofPVCavailabilityparameters
I.1AminimaltestforPVCserviceavailability
I.2ProceduresforestimatingPVCserviceavailability
I.3ProceduresforestimatingmeantimebetweenPVCservice
outages