Transmission and Multiplexing (TM); Generic requirements of transport functionality of equipment; Part 2-2: Synchronous Digital Hierarchy (SDH) and Plesiochronous Digital Hierarchy (PDH) physical section layer functions; Implementation Conformance Statement (ICS) proforma specification
传输和多路复用(TM);设备运输功能的一般要求;第2-2部分:同步数字体系(SDH)和准同步数字体系(PDH)物理层功能;实施一致性声明(ICS)形式规范