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ETSI TS 123 121

M00001155

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ETSI TS 123 121 Digital cellular telecommunications system (Phase 2+); Universal Mobile Telecommunications System (UMTS); Architecture Requirements for release 99 (3GPP TS 23.121 version 3.6.0 Release 1999)

standard by European Telecommunications Standards Institute, 06/01/2002

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The present document covers issues related to the evolution of the GSM platform towards UMTS with the overall goal of fulfilling the UMTS service requirements, the support of the UMTS role model, support of roaming and support of new functionality, signalling systems and interfaces.