ETSI ETS 300 369-4
- Integrated Services Digital Network (ISDN); Explicit Call Transfer (ECT) supplementary service; Digital Subscriber Signalling System No. one (DSS1) protocol; Part 4: Abstract Test Suite (ATS) and partial Protocol Implementation eXtra Information for Testi
- standard by European Telecommunications Standards Institute, 05/01/1997
- Publisher: ETSI
$66.00$131.00
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