DIN ETS 300196-4:1999-08
Отменен
Integrated Services Digital Network (ISDN) - Generic functional protocol for the support of supplementary services; Digital Subscriber Signalling System No. one (DSS1) protocol - Part 4: Abstract Test Suite (ATS) and partial Protocol Implementation eXtra Information for Testing (PIXIT) proforma specification for the user (Endorsement of the English version ETS 300196-4:1998 as German standard)
