General Arrangements for Interworking between B-ISDN and 64 kbit/s Based ISDN - Integrated Services Digital Network (ISDN) Internetwork Interfaces (Study Group 13) 34 pp
The ITU-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