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ITU-T Recommendation E.550 Telephone network and ISDN. Quality of service, network management and traffic engineering. Grade-of-service and new performance criteria under failure conditions in international telephone exchanges
Название документа
ITU-T Recommendation E.550 Telephone network and ISDN. Quality of service, network management and traffic engineering. Grade-of-service and new performance criteria under failure conditions in international telephone exchanges
Номер документа
E.550
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