ETSI EN 300 899-4
- Final draft Version 1.1.1Integrated Services Digital Network (ISDN); Signalling System No.7 (SS7); Interworking between ISDN User Part (ISUP) version 2 and Digital Subscriber Signalling System No. one (DSS1); Part 4: Abstract Test Suite (ATS) and partial
- standard by European Telecommunications Standards Institute, 01/01/2002
- Publisher: ETSI
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