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ETSI TS 101 644
- Digital cellular telecommunications system (Phase 2+) (GSM); Interworking between Phase 1 infrastructure and Phase 2 Mobile Stations (MS) (GSM 09.90 version 5.1.0 Release 1996)
- standard by European Telecommunications Standards Institute, 02/01/2001
- Publisher: ETSI
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The Scope of this GTS is to clarify how interworking can be obtained between phase 2 mobile stations and phase 1 infrastructure. The objective is to obtain this without changing the consolidated set of phase 1 specifications. This Technical Report specifies the necessary amendments to the phase 1 infrastructure so that an acceptable service is offered to mobile stations of phase 2, guaranteeing that a phase 2 mobile station obtains all phase 1 services. This report outlines the necessary changes as well as the necessary controls and clarifications with regard to phase 1 implementation, which should be performed to the different interfaces in phase 1 infrastructure before phase 2 mobiles are offered service.