DIN ETS 300443-2:1998-02
Отменен
Broadband Integrated Services Digital Network (B-ISDN) - Digital Subscriber Signalling System No. two (DSS2) protocol; B-ISDN user-network interface layer 3 specification for basic call/bearer control - Part 2: Protocol Implementation Conformance Statement (PICS) proforma specification; English version ETS 300443-2:1997
