ETSI TS 123 086
ETSI TS 123 086
Digital cellular telecommunications system (Phase 2+) (GSM); Universal Mobile Telecommunications System (UMTS); Advice of Charge (AoC) supplementary services - Stage 2 (3GPP TS 23.086 version 3.1.0 Release 1999)
standard published 10/01/2000 by European Telecommunications Standards Institute
