ETSI TS 122 003
ETSI TS 122 003
Digital cellular telecommunications system (Phase 2+) (GSM); Universal Mobile Telecommunications System (UMTS); Circuit Teleservices supported by a Public Land Mobile Network (PLMN) (3GPP TS 22.003 version 4.2.0 Release 4)
standard published 07/01/2001 by European Telecommunications Standards Institute
