This seventh part of EN 300 402 specifies the Abstract Test Suite (ATS) and partial Protocol Implementation eXtra
Information for Testing (PIXIT) proforma for the user-network interface data link layer at the T reference point or
coincident S and T reference point (as defined in ITU-T Recommendation I.411 [9]) of implementations conforming to
the standard for the general data link layer protocol for the pan-European Integrated Services Digital Network (ISDN)
by means of the Digital Subscriber Signalling System No. one (DSS1) protocol, ETS 300 402-2 [1].
ETS 300 402-6 [3] specifies the Test Suite Structure and Test Purposes (TSS&TP) related to this ATS and partial
PIXIT proforma specification.