Teleservices Supported by a GSM Public Land Mobile Network (PLMN)
The present document describes and defines a recommended set of Teleservices to be supported by a GSM PLMN in connection with other networks as a basis for defining the network capabilities required.
Teleservices not included in the present document should not be introduced unilaterally by a mobile network operator, if the provision of this service requires that the GSM signalling specifications are modified.