DIN EN 300196-2:2002-03
Действует
Integrated Services Digital Network (ISDN) - Generic functional protocol for the support of supplementary service; Digital Subscriber Signalling System No. one (DSS1) protocol - Part 2: Protocol Implementation Conformance Statement (PICS) proforma specification (Endorsement of the English version EN 300196-2 V 1.3.2 (2001-06) as German Standard)
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