ETSI TS 123 121-2002 Digital Cellular Telecommunications System (Phase 2+); Universal Mobile Telecomminications System (UMTS); Architectural Requirements for Release 99 (3GPP TS 23.121 Version 3.6.0 Release 1999)
European Telecommunications Standards Institute (ETSI)
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ETSI TS 123 121-2002
ETSI TS 123 121-2002 history
2002ETSI TS 123 121-2002 Digital Cellular Telecommunications System (Phase 2+); Universal Mobile Telecomminications System (UMTS); Architectural Requirements for Release 99 (3GPP TS 23.121 Version 3.6.0 Release 1999)
2000ETSI TS 123 121-2000 Universal Cellular Telecommunications System (Phase 2+); Universal Mobile Telecomminications System (UMTS); Architectural Requirements 3G TS 23.121 Version 3.3.0 Release 1999