Transmission and Multiplexing (TM) - Generic requirements of transport functionality of equipment - Part 5-1: Plesiochronous Digital Hierarchy (PDH) path layer functions (Endorsement of the English version EN 300417-5-1 V 1.2.1 (2001-10) as German Standard)
传输和多路复用(TM).设备传输功能的一般要求.第5-1部分:准同步数字体系(PDH)路径层功能(认可英文版EN 300417-5-1 V 1.2.1(2001-10)为德国标准)