(WITHDRAWN) Specific Tariff and Accounting Principles Applicable to ISDN Supplementary Services - Charging and Accounting in International Telecommunication Services (Study Group 3) 11 pp
The ??ü-T (Telecommunication Standardization Sector) is a permanent organ of the International Telecommunication Union (ITU). The ITU-T is responsible for studying technical, operating and tariff questions and issuing Recommendations on them with a view t