DIN EN 301217-1:2000 数字服务节点(SN)的V接口.宽带或宽带和窄带组合的接入网络(ANS)支持用VB5.2参考点接口.第1部分:接口规范
V interface at the digital Service Node (SN) - Interface at the VB5.2 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 301217-1