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 4.0.0 Release 4)
standard published 03/01/2001 by European Telecommunications Standards Institute
