PN-ETSI EN 302 092-4 V1.1.1:2005 - wersja angielska
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Broadband Integrated Services Digital Network (B-ISDN) and Broadband Private Integrated Services Network (B-PISN) -- Digital Subscriber Signalling System No. Two (DSS2) and Broadband QSIG (B-QSIG) protocols -- Call control specification in separated call and bearer control environment -- Part 4: Abstract Test Suite (ATS) and partial Protocol Implementation eXtra Information for Testing (PIXIT) proforma specification
