ETSI EN 300 745-4
- Integrated Services Digital Network (ISDN); Message Waiting Indication (MWI) supplementary service; Digital Subscriber Signalling System No. one (DSS1) protocol; Part 4: Abstract Test Suite (ATS) and partial Protocol Implementation eXtra Information for T
- standard by European Telecommunications Standards Institute, 11/01/1999
- Publisher: ETSI
$56.00$111.50
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