ITU Q.543:1993
ITU Q.543:1993 Digital Exchange Performance Design Objectives
Table of Contents
1General2Performancedesignobjectives
2.1Referenceloads
2.2Inadequatelyhandledcallattempts
2.3Delayprobabilityfnon-ISDNormixed(ISDNf
non-ISDN)environment
2.4DelayprobabilityfISDNenvironment
2.5Callprocessingperformanceobjectives
2.6Transmissionperformance
2.7Sliprate
3Exchangeperformanceduringoverloadconditions
3.1Explanationoftermsusedindefinitionof
overloadparameters
3.2Callprocessingperformanceduringoverload
3.3Engineeredexchangecapacity
3.4Overloadcontrolstrategy
3.5Detectionofoverload
3.6Overloadprotection
3.7Gradeofserviceduringoverload
3.8Performancemonitoringduringoverloadcontrol
activation
AnnexAAnexampleofmethodologyforcomputingthe
callprocessingcapacityofaDigitalExchange,
takingintoaccountISDNservices,including
packetdatahandling
A.1General
A.2Definitions
A.3Processingcapacitycomputation(foracentral
processingunit)
A.4Processingcapacitycomputation(foran
interfaceunit)
A.5Examplesofprocessingcapacitycomputations
A.6Packethandling
A.7Capacitycomputationforexchangearchitectures
otherthanthatassumedinFigureA.1
A.8Conclusion
AnnexBAnexampleofamethodologyformeasuring
exchangecapacity
B.1General
B.2Theorybehindthemeasurementmethod
B.3Capacitymeasurementmethodologyforexchanges