This European Telecommunication Standard (ETS) specifies the procedures used at the radio interface (reference point Um as defined in GSM 04.02) for normal operation, registration, erasure, activation, deactivation, interrogation and network invocation of call offering 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.
PUBLISHED
SSH ETS 300 952:1997 ed.1
60.60
Standard published
19 qer 2025