As a consequence of a reform process within the International Telecommunication Union (ITU), the CCIIIT ceased to exist as of 28 February 1993. In its place, the ITU Telecommunication Standardization Sector (ITU-T) was created as of 1 March 1993. Similarl
ITU-T Q.921 BIS-1993 history
1993ITU-T Q.921 BIS-1993 Abstract Test Suite for LAPD Conformance Testing (Study Group XI) 13 pp