This second part of ETS 300 356 specifies procedures that are common to multiple supplementary services defined for the pan-European Integrated Services Digital Network (ISDN) as provided by the European public telecommunications operators by means of the Signalling System No.7 protocol for the ISDN User Part (ISUP). This ETS identifies the protocol procedures and switching functions needed to support telecommunication services (see CCITT Recommendation I.130 [1]).
PUBLISHED
SSH ETS 300 356-2:1995 ed.1
60.60
Standard published
Jun 19, 2026