ETSI EN 300 356-1
- Integrated Services Digital Network (ISDN); Signalling System No.7 (SS7); ISDN User Part (ISUP) version 4 for the international interface; Part 1: Basic services [ITU-T Recommendations Q.761 to Q.764 (1999) modified]
- standard by European Telecommunications Standards Institute, 07/01/2001
- Publisher: ETSI
$21.00$41.00
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