2014YD 5095-2014 Design Specification for Synchronous Digital Hierarchy (SDH) Optical Fiber Transmission System Project
2006YD/T 5024-2005 Design Specification for SDH Local Network Optical Fiber Cable Transmission Project
1998YD 5075-1998 Digital Cross-connect Equipment Engineering Designing Standard for Local Telephone Network
YD 5075-1998 Digital Cross-connect Equipment Engineering Designing Standard for Local Telephone Network was changed to YD/T 5024-2005 Design Specification for SDH Local Network Optical Fiber Cable Transmission Project.
YD 5075-1998 Digital Cross-connect Equipment Engineering Designing Standard for Local Telephone Network was changed to YD/T 5024-2005 Design Specification for SDH Local Network Optical Fiber Cable Transmission Project.