The CCITT (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.3640-1992 history
1992ITU-T M.3640-1992 Management of the D-Channel - Data Link Layer and Network Layer - Maintenance: ISDN (Study Group IV) 24 pp