Signalling Protocols and Switching (SPS) - V interfaces at the digital Local Exchange (LE) - V5.2 interface for the support of Access Network (AN) - Part 9: Test specification for the physical layer; English version ETS 300347-9:1996
数字本地交换机(LE)-V5的信令协议和交换(SPS)-V接口 2接入网(AN)支持接口第9部分:物理层测试规范;英语版ETS 300347-9:1996