ETSI EN 300 899-1
- Integrated Services Digital Network (ISDN); Signalling System No.7; Interworking between ISDN User Part (ISUP) version 2 and Digital Subscriber Signalling System No. one (DSS1); Part 1: Protocol specification [ITU-T Recommendation Q.699, modified]
- standard by European Telecommunications Standards Institute, 09/01/1998
- Publisher: ETSI
$21.00$41.00
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