ITU-T M.1520-1992 Standardized Information Exchange between Administrations - Maintenance: Designations and Information Exchange (Study Group IV) 12 pp
The CCITï (the International Telegraph and Telephone Consultative Committee) is a permanent organ of the International Telecommunication Union (ITU). CCITT is responsible for studying technical, operating and tariff questions and issuing Recommendations o
ITU-T M.1520-1992 history
1992ITU-T M.1520-1992 Standardized Information Exchange between Administrations - Maintenance: Designations and Information Exchange (Study Group IV) 12 pp