Transmission and Multiplexing (TM) - Physical and electrical characteristics of hierarchical digital interfaces for equipment using the 2048 kbit/s-based plesiochronous or synchronous digital hierarchies; (Endorsement of the English version EN 300166 V 1.2.1 (2001-09) as German Standard)
传输和多路复用(TM)-使用基于2048 kbit/s的准同步或同步数字层次结构的设备的层次数字接口的物理和电气特性;(认可英文版EN 300166 V 1.2.1(2001-09)为德国标准)