ETSI TS 123 088
ETSI TS 123 088
Digital cellular telecommunications system (Phase 2+) (GSM); Universal Mobile Telecommunications System (UMTS); Call Barring (CB) Supplementary Services - Stage 2 (3G TS 23.088 version 3.0.0 Release 1999)
standard published 01/01/2000 by European Telecommunications Standards Institute