ETSI TS 123 054

Digital cellular telecommunications system (Phase 2 ) (GSM); Universal Mobile Telecommunications System (UMTS); Description for the use of a Shared Inter Working Function (SIWF) in a GSM PLMN - Stage 2 (3G TS 23.054 version 3.0.0 Release 1999) Edition: 3.0.0
European Telecommunications Standards Institute / 01-Jan-2000 / 27 pages