Published
The purpose of this European Telecommunication Standard (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.
PUBLISHED
SSH ETS 300 503:1996 ed.2
60.60
Standard published
Oct 20, 2025