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ETSI ETS 300 976

M00000502

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ETSI ETS 300 976 Digital cellular telecommunications system (Phase 2+) (GSM); General requirements on interworking between the Public Land Mobile Network (PLMN) and the Integrated Services Digital Network (ISDN) or Public Switched Telephone Network (PSTN) (GSM 09.07 version 5.3.1)

standard by European Telecommunications Standards Institute, 09/01/1997

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This European Telecommunication Standard (ETS) identifies the Mobile-s ervices Switching Centre/Interworking Functions (MSC/IWFs) and require ments to support interworking between: a)PLMN and PSTN b)PLMN and ISDN It is not possible to treat ISDN and PSTN as one type of network, even when both ISDN and PSTN subscribers are served by the same exchange b ecause of the limitations of the PSTN subscribers access i.e. analogue connection without D-channel signalling. Within this ETS, the requirements for voice and non-voice (data) calls are considered separately.