The CCITT (the International Telegraph and Telephone Consultative Committee) is a permanent organ of
the International Telecommunication Union 0C.CITT is responsible for studying technical, operating and tariff questions and issuing Recommendations on th
ITU-T F.80-1991 history
1991ITU-T F.80-1991 Basic Requirements for Interworking Relations Between the International Telex Service and Other Services (Study Group I) 6 pp