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ETSI ETS 300 918

M00000525

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ETSI ETS 300 918 Digital cellular telecommunications system (Phase 2+) (GSM); General on supplementary services (GSM 02.04 version 5.5.1)

standard by European Telecommunications Standards Institute, 08/01/1997

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The purpose of this ETS is to define a recommended set of supplementary services to the Teleservices and Bearer services which will be supported by a GSM PLMN in connection with other networks as a basis for the definition of the network capabilities required. The descriptions of the different supplementary services are contained in specifications GSM 02.80 series. Supplementary services not covered in GSM 02.04 or GSM 02.80 series cannot be introduced unilaterally in any GSM PLMN if they require modification of the GSM signalling Specifications. Technical realization of supplementary services is described in Specifications GSM 03.11 and 04.10.