ITU-T F.23-1988 Grade of Service for Long-Distance International Gentex Circuits - Telegraph and Mobile Services Operations and Quality of Service (Study Group I) 1 pp
Grade of Service for Long-Distance International Gentex Circuits - Telegraph and Mobile Services Operations and Quality of Service (Study Group I) 1 pp
ITU-T F.23-1988 history
1993ITU-T F.23-1993 GRADE OF SERVICE FOR LONG - DISTANCE INTERNATIONAL GENTEX CIRCUITS
1988ITU-T F.23-1988 Grade of Service for Long-Distance International Gentex Circuits - Telegraph and Mobile Services Operations and Quality of Service (Study Group I) 1 pp