Fixed Radio Systems - Point-to-point equipment - Plesiochronous Digital Hierarchy (PDH); Low and medium capacity digital radio systems operating in the 13 GHz, 15 GHz and 18 GHz frequency bands (Endorsement of the English version EN 301128 V 1.2.1 (2001-02) as German Standard)
固定无线电系统.点对点设备.准同步数字体系(PDH);在13 GHz、15 GHz和18 GHz频段运行的中低容量数字无线电系统(认可英文版EN 301128 V 1.2.1(2001-02)为德国标准)