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ITU-T E.430 Quality of service framework
ITU-T E.431 Telephone network and ISDN, quality service, network management and traffic engineering, service quality assessment for connection set-up and release delays
ITU-T E.432 Telephone network and ISDN, quality of service, network management and traffic engineering, connection quality
ITU-T E.433 Telephone network and ISDN, quality of service, network management and traffic engineering, billing integrity
ITU-T E.434 Telephone network and ISDN, quality of service, network management and traffic engineering, subscriber-to-subscriber measurement of public switched telephone network
ITU-T E.490 Telephone network and ISDN, quality of service, network management and traffic engineering, traffic measurement and evaluation, general survey
ITU-T E.505 Telephone network and ISDN, quality of service, network management and traffic engineering, measurements of the performance of common channel signalling network
ITU-T E.503 Telephone network and ISDN, quality of service, network management and traffic engineering, traffic measurement data analysis
ITU-T E.506 Telephone network and ISDN, quality of service, network management and traffic engineering, forecasting international traffic
ITU-T E.525 Telephone network and ISDN, quality of service, network management and traffic engineering, designing networks to control grade of service
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