The CCITT, considering the need to define a unit measuring the volume of information transmitted in an international packet-switched data communication service.
ITU-T D.12 SPANISH-1993 Referenced Document
ITU-T X.1 International User Classes of Service in and Categories of Access to Public Data Networks and Integrated Services Digital Networks (ISDNs) Series X: Data Networks and Open System Communications Public Data Networks - Services and Facilities Study Group 7;*， 2000-03-01 Update
ITU-T X.2 International Data Transmission Services and Optional User Facilities in Public Data Networks and ISDNs Series X: Data Networks and Open System Communications Public Data Networks - Services and Facilities Study Group 7; 27 pp*， 2000-03-01 Update
ITU-T X.25 Interface between Data Terminal Equipment (DTE) and Data Circuit-Terminating Equipment (DCE) for Terminals Operating in the Packet Mode and Connected to Public Data Networks by Dedicated Circuit - Series X: Data Networks and Open System Communication Publ*， 1996-04-19 Update
ITU-T X.3 Packet Assembly/Disassembly Facility (PAD) in a Public Data Network Series X: Data Networks and Open System Communications Public Data Networks - Services and Facilities Syudy Group 7; 28pp*， 2000-03-01 Update
ITU-T D.12 SPANISH-1993 history
1993ITU-T D.12 SPANISH-1993 MEASUREMENT UNIT FOR CHARGING BY VOLUME IN THE INTERNATIONAL PACKET-SWITCHED DATA COMMUNICATION SERVICE