ETSI EN 300 141-6
- Integrated Services Digital Network (ISDN); Call Hold (HOLD) supplementary service; Digital Subscriber Signalling System No. one (DSS1) protocol; Part 6: Abstract Test Suite (ATS) and partial Protocol Implementation eXtra Information for Testing (PIXIT) p
- standard by European Telecommunications Standards Institute, 11/01/1999
- Publisher: ETSI
$58.00$115.50
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