ETSI EN 300 359-4
- Integrated Services Digital Network (ISDN); Completion of Calls to Busy Subscriber (CCBS) supplementary service; Digital Subscriber Signalling System No. one (DSS1) protocol; Part 4: Abstract Test Suite (ATS) and partial Protocol Implementation eXtra Info
- standard by European Telecommunications Standards Institute, 11/01/2001
- Publisher: ETSI
$95.00$189.00
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