ETSI ETS 300 210-4
- Integrated Services Digital Network (ISDN); Freephone (FPH) supplementary service; Digital Subscriber Signalling System No. one (DSS1) protocol; Part 4: Abstract Test Suite (ATS) and partial Protocol Implementation eXtra Information for Testing (PIXIT) pr
- standard by European Telecommunications Standards Institute, 04/01/1998
- Publisher: ETSI
$56.00$111.50
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