ETSI TS 122 086
ETSI TS 122 086
Digital cellular telecommunications system (Phase 2+) (GSM); Universal Mobile Telecommunications System (UMTS); Advice of Charge (AoC) Supplementary Services - Stage 1 (3G TS 22.086 version 3.1.0 Release 1999)
standard published 03/01/2000 by European Telecommunications Standards Institute
