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 O.3-1992 history
1992ITU-T O.3-1992 Climatic Conditions and Relevant Tests for Measuring Equipment - Specifications of Measuring Equipment (Study Group IV) 7 pp