DIN ETS 300061-6:1998-04
Отменен
Integrated Services Digital Network (ISDN) - Subaddressing (SUB) supplementary service; Digital Subscriber Signalling System No. one (DSS1) protocol - Part 6: Abstract Test Suite (ATS) and partial Protocol Implementation eXtra Information for Testing (PIXIT) proforma specification for the network; English version ETS 300061-6:1997
