SSH ETS 300 558:1996 ed.2

Digital cellular telecommunications system (Phase 2) (GSM); Mobile radio interface layer 3; Supplementary services specification; General aspects (GSM 04.10)

Scope

In this ETS, the general aspects of the specification of supplementary services at the layer 3 radio interface are given. Technical specifications GSM 04.8x and 04.9x-series specify the procedures used at the radio interface (reference point Um as defined in technical specification 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. Technical specifications GSM 04.08 and GSM 04.80 specifies the formats and coding for the supplementary services.