ETSI TS 123 121
- Digital cellular telecommunications system (Phase 2+) (GSM); Universal Mobile Telecommunications System (UMTS); Architectural Requirements for Release 1999 (3GPP TS 23.121 version 3.5.1 Release 1999)
- standard by European Telecommunications Standards Institute, 12/01/2000
- Publisher: ETSI
$26.00$52.50
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