DIN EN 301005-1:2000-02
Действует
V interfaces at the digital Service Node (SN) - Interfaces at the VB5.1 reference point for the support of broadband or combined narrowband and broadband Access Networks (ANs) - Part 1: Interface specification (Endorsement of the English version EN 301005-1 V 1.1.4 (1998-05) as German Standard)
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