ETSI EN 301 061-1
- Integrated Services Digital Network (ISDN); Digital Subscriber Signalling System No. one (DSS1) protocol; Generic functional protocol for the support of supplementary services at the b service entry point for Virtual Private Network (VPN) applications; Pa
- standard by European Telecommunications Standards Institute, 04/01/1998
- Publisher: ETSI
$17.00$33.00
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