This standard defines the stage one of the Multiple Subscriber Number (MSN) supplementary service for the pan-European Integrated Services Digital Network (ISDN) as provided by European public telecommunications operators. Stage one is an overall service description from the user's point of view (see CCITT Recommendation I.130 [1]), but does not deal with the details of the human interface itself.
PUBLISHED
SSH ETS 300 050:1991
60.60
Standard published
Sep 13, 2023