同步数字体系（SDH）光缆线路系统进网要求
Requirements for Synchronous Digital hierarchy (SDH) Optical Fiber Cable Line Systems
2008-04-10
YD/T 744-2009
准同步数字系列（PDH）数字微波通信设备和系统技术要求及测试方法
Technical requirements and test methods for digital microwave telecommunication equipments（systems）of plesiochronous digital hierarchy (PDH)
2009-12-11
DL/T 5404-2007
电力系统同步数字系列(SDH)光缆通信工程设计技术规定(附条文说明)
Technical rule of electric power system engineering design for SDH optical fiber cable communication project