ETSI TS 122 085
ETSI TS 122 085
Digital cellular telecommunications system (Phase 2+) (GSM); Universal Mobile Telecommunications System (UMTS); Closed User Group (CUG) Supplementary Services - Stage 1 (3GPP TS 22.085 version 4.0.0 Release 4)
standard published 03/01/2001 by European Telecommunications Standards Institute
