V interfaces at the digital Local Exchange (LE) - V5.1 interface for the support of Access Network (AN) - Part 1: V5.2 interface specifictation (Endorsement of the English version EN 300347-1 V 2.2.2 (1999-12) as German standard)
数字本地交换机(LE)-V5上的V接口 接入网(AN)支持接口.第1部分:V5 2接口规范(认可英文版EN 300347-1 V 2.2.2(1999-12)为德国标准)