ITU-T E.862-1992 Telephone network and ISDN; quality of service, network management and traffic engineering; dependability planning of telecommunication networks
ITU-T E.845-1988 Connection accessibility objective for the international telephone service
ITU-T E.855-1988 Connection integrity objective for the international telephone service
ITU-T X.138 Measurement of Performance Values for Public Data Networks When Providing International Packet-Switched Services - Series X: Data Networks and Open System Communication Public Data Networks - Network Aspects Study Group 7; 43 pp*, 1997-08-01 Update
ITU-T X.139 Echo Drop Generator and Test DTEs for Measurement of Performance Values in Public Data Networks When Providing International Packet-Switched Services - Series X: Data Networks and Open System Communication Public Data Networks - Network Aspects Study Grou*, 1997-08-01 Update