ITU I.355:2000

ITU I.355:2000 Isdn 64 Kbit/s Connection Type Availability Performance Define parameters and objectives describing availability performance of the following 64 kbit/s ISDN connection types: - Packet-Switched Connection Type (PSCT); - Circuit-Switched Connection Type (CSC

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Table of Contents

1Introduction
1.1Purpose
1.2Scope
1.3Abbreviations
1.4RelatedRecommendations
1.5Methodologyofavailabilityspecification
1.6OrganizationofthisRecommendation
2ISDN64kbit/spacket-switchedconnectiontype
(PSCT)availabilityperformance
2.1PSCTavailabilityfunction
2.2PSCTavailabilityparameters
2.3PSCTavailabilityobjectives
3ISDN64kbit/scircuit-switchedconnectiontype
(CSCT)availabilityperformance
3.1CSCTavailabilityfunction
3.2CSCTavailabilityparameters
3.3CSCTavailabilityobjectives
4ISDN64kbit/sdedicated-circuitconnectiontype
(DCCT)availabilityperformance
4.1DCCTavailabilityfunction
4.2DCCTavailabilityparameters
4.3DCCTavailabilityobjectives
ANNEXA-SamplingestimationofISDNavailability
parameters
A.1Estimationoftheavailabilitystateof
switchedISDN64kbit/sconnectiontype
portions
A.1.1DefinitionoftheminimaltestforPSCT
availabilitystatedetermination
A.1.2DefinitionoftheminimaltestforCSCT
availabilitystatedetermination
A.2Procedureforestimatingavailabilityof
switchedISDN64kbit/sconnectiontype
portions
A.3Procedureforestimatingmeantimebetween
connectionportionoutagesofswitchedISDN
64kbit/sconnectiontypes
A.4StatisticalbasisofPhaseIminimaltest
withN=4
A.5Applicationofthesequentialprobabilityratio
test(SPRT)tothePhaseIminimaltestfor
availability
A.5.1SPRTtestprocedure
A.5.2SPRTmethodology
ANNEXB-Representativeend-to-endavailability
performanceofISDN64kbit/s
connectiontypes
B.1Representativeend-to-enddesignavailability
performanceofISDN64kbit/spacket-switched
connectiontype(PSCT)
B.1.1Definitionoftheexampleend-to-endPSCT
connections
B.1.2End-to-endPSCTavailabilityperformancefor
theCase1andCase2configurationexamples
B.1.3Representativedesignavailabilityperformance
ofotherISDN64kbit/sconnectiontypes
B.2Derivationoftheend-to-end"95thpercentile"
availabilityfrom"worst-case"availabilities
ofconnectionportions
ANNEXC-Relatedavailabilityparameters
ANNEXD-FactorstobespecifiedinreportingISDN
availabilityperformanceof64kbit/sconnection
types
D.1Plannedhoursofconnectionportionavailability

Abstract

Define parameters and objectives describing availability performance of the following 64 kbit/s ISDN connection types: - Packet-Switched Connection Type (PSCT); - Circuit-Switched Connection Type (CSCT); - Dedicated-Circuit Connection Type (DCCT).

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