ETSI TS 124 087
ETSI TS 124 087
Digital cellular telecommunications system (Phase 2+) (GSM); Universal Mobile Telecommunications System (UMTS); User-to-User Signalling (UUS) Supplementary Service - Stage3 (3GPP TS 24.087 version 4.0.0 Release 4)
standard published 03/01/2001 by European Telecommunications Standards Institute
