ITU-T F.30-1993 Use of Various Sequences of Combinations for Special Purposes - Operations and Quality of Service; Telegraph Services (Study Group I) 5 pp
The ITU Telecommunication Standardization Sector (1721-T) is a permanent organ of the International Telecommunication Union. The 1721-T is responsible for studying technical, operating and tariff questions and issuing Recommendations on them with a view t
ITU-T F.30-1993 history
1993ITU-T F.30-1993 Use of Various Sequences of Combinations for Special Purposes - Operations and Quality of Service; Telegraph Services (Study Group I) 5 pp