DIN ETS 300009-2:1997-07
Отменен
Integrated Services Digital Network (ISDN) - Signalling system No. 7; Signalling Connection Control Part (SCCP) (connectionless and connection-oriented class 2) to support international interconnection - Part 2: Protocol Implementation Conformance Statement (PICS) proforma specification; English version ETS 300009-2:1996
