DIN ETS 300661-2:2000-05
Действует
Broadband Integrated Services Digital Network (B-ISDN) - Digital Subscriber Signalling System No. two (DSS2) protocol; Direct Dialling In (DDI) supplementary service - Part 2: Protocol Implementation Conformance Statement (PICS) proforma specification (Endorsement of the English version ETS 300661-2:1997 as German Standard)
