ETSI TS 124 086
ETSI TS 124 086
Digital cellular telecommunications system (Phase 2+) (GSM); Universal Mobile Telecommunications System (UMTS); Advice of Charge (AOC) supplementary services - Stage3 (3G TS 24.086 version 3.0.0 Release 1999)
standard published 01/01/2000 by European Telecommunications Standards Institute