Capability for Seven Digit Analysis of International E.164 Numbers at Time T - Telephone Network and ISDN - Operation Numbering Routing and Mobile Service (Study Group 2) 5 pp
The ITü-T (Telecommunication Standardization Sector) is a permanent organ of the International Telecommunication Union (ITU). The ïïü-T is responsible for studying technical, operating and tariff questions and issuing Recommendations on them with a view t