ETSI TS 123 093
ETSI TS 123 093
Digital cellular telecommunications system (Phase 2+) (GSM); Universal Mobile Telecommunications System (UMTS); Technical realization of Completion of Calls to Busy Subscriber (CCBS); Stage 2 (3GPP TS 23.093 version 3.2.0 Release 1999)
standard published 09/01/2000 by European Telecommunications Standards Institute
