DIN EN 301387-2003 固定无线电系统.点对点设备.准同步数字体系(PDH).频道范围48.5MHz至50.2MHz中使用的低容量和中等容量数字无线电系统
Fixed Radio Systems - Point-to-point equipment - Plesiochronous Digital Hierarchy (PDH) - Low and medium capacity digital radio systems operating in the frequency band 48,5 GHz to 50,2 GHz (Endorsement of the English version EN 301387 V 1.2.1 (2001-02) as