ETSI TS 122 093
ETSI TS 122 093
Digital cellular telecommunications system (Phase 2+) (GSM); Universal Mobile Telecommunications System (UMTS); Completion of Calls to Busy Subscriber (CCBS); Service description, Stage 1 (3GPP TS 22.093 version 4.0.0 Release 4)
standard published 03/01/2001 by European Telecommunications Standards Institute
