ITU-T Recommendation E.855 Telephone network and ISDN. Quality of service, network management and traffic engineering. Connection integrity objective for international telephone service

CCITT Recommendation E.850 Telephone network and ISDN. Quality of service, network management and traffic engineering. Connection retainability objective for the international telephone service ITU-T Recommendation E.846 Telephone network and ISDN. Quality of service, network management and traffic engineering. Accessibility for 64 kbit/s circuit switched international end-to-end ISDN connection types ITU-T Recommendation E.845 Telephone network and ISDN. Quality of service, network management and traffic engineering. Connection accessibility objective for the international telephone service ITU-T Recommendation E.860 Series E: Overall network operation, telephone service, service operation and human factors. Quality of telecommunication services: concepts, models, objectives and dependability planning… Framework of a service level agreement Рекомендация МСЭ-Т E.861 Серия E: Общая эксплуатация сети, телефонная служба, функционирование служб и человеческие факторы. Качество услуг электросвязи: концепции, модели, цели и планирование надежности… Определение метрик способности выполнять работу CCITT Recommendation E.862 (rev.1) Telephone network and ISDN. Quality of service, network management and traffic engineering. Dependability planning of telecommunication networks