ITU-T U.61-1993 Detailed Requirements to Be Met in Interfacing the International Telex Network with Maritime Satellite Systems - Telegraph Switching Radiotelex Interworking (Study Group IX) 13 pp
As a consequence of a reform process within the International Telecommunication Union (ITU), the CCITT ceased to exist as of 28 February 1993. In its place, the ITU Telecommunication Standardization Sector (ITU-T) was created as of 1 March 1993. Similarly
ITU-T U.61-1993 history
1993ITU-T U.61-1993 Detailed Requirements to Be Met in Interfacing the International Telex Network with Maritime Satellite Systems - Telegraph Switching Radiotelex Interworking (Study Group IX) 13 pp