SSH ETS 300 941:1997 ed.1

Digital cellular telecommunications system; Mobile radio interface layer 3; Supplementary services specification; General aspects (GSM 04.10 version 5.0.1)

Scope

In this European Telecommunication Standard (ETS) the general aspects of the specification of supplementary services at the layer 3 radio interface are given. GSM 04.8x and 04.9x-series specify the procedures used at the radio interface (reference point Um as defined in GSM 04.02) for normal operation, registration, erasure, activation, deactivation, invocation and interrogation of supplementary services. Provision and withdrawal of supplementary services is an administrative matter between the mobile subscriber and the service provider and cause no signalling on the radio interface. GSM 04.08 and GSM 04.80 specifies the formats and coding for the supplementary services. Definitions and descriptions of supplementary services are given in GSM 02.04 and GSM 02.8x and 02.9x-series. Technical realization of supplementary services is described in GSM 03.11 and GSM 03.8x and 03.9x-series.