this document is intended as an introductory guide to the synchronous digital hierarchy (SDH) multiplexing standard. use this primer as an introduction to the technology of SDH. consult the actual material from ITU-T, paying particular attention to t

介绍SDH的详细文档，主要从SDH的原理介绍相关内容包括：概述、复用、传输性能等八个章节-Introduction of SDH detailed documentation, the main principles of introduction from the SDH-related content include: Overview, multiplexing, transmission performance of eight chapters

使用KEIL MDK开发的STM32程序； 实现OEO的功能； 实现10G以上的交叉功能； 用于波分复用、SDH等光传输领域-STM32 use KEIL MDK development program Achieve OEO functionality 10G or more to achieve cross-functional For wavelength division multiplexing optical transmission, SDH, etc