This European Telecommunication Standard (ETS) describes in general terms the link access procedure of the Digital Subscriber Signalling System No. one (DSS1) protocol when used in the pan-European Integrated Services Digital Network (ISDN) as provided by European public telecommunications operators@ or in a Private Telecommunication Network (PTN)@ at the T reference point or the S reference point or the coincident S and T reference point (as defined in CCITT Recommendation I.411 [B]). Annex ZA of this ETS describes in general terms the link access procedure for use in a symmetrical application between two Private Telecommunication Network eXchanges (PTNXs) at the Q reference point (seeENV 41004[9]). Conformance to this ETS is met by conforming to the specific protocol standards for individual applications. Therefore@ no separate method of testing is provided for this ETS. The field of application of this ETS is determined by specific protocol standards for individual applications.
PRETS 300 402-2-1994由ETSI - European Telecommunications Standards Institute 发布于 1994-01-01,并于 2014-04-10 实施。
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