ITU-T U.206-1993 Technical Requirements for Interworking between the International Telex Service and the Videotex Service - Telegraph Switching International Telex Service (Study Group IX) 10 pp
service and the videotex service, using a TelexNideotex Conversion Facility (VTXCF).
ITU-T U.206-1993 history
1993ITU-T U.206-1993 Technical Requirements for Interworking between the International Telex Service and the Videotex Service - Telegraph Switching International Telex Service (Study Group IX) 10 pp