Synchronous optical networking
- 同步光网络（同步光纤网络是用光纤进行数字化信息通信的标准，用于传送大量电话和数据业务，替代准同步数字体系系统，由GR-253-CORE定义）
Synchronous optical networking
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abstract:
Synchronous Optical Networking (SONET) and Synchronous Digital Hierarchy (SDH) are standardized protocols that transfer multiple digital bit streams over optical fiber using lasers or highly coherent light from light-emitting diodes (LEDs). At low transmission rates data can also be transferred via an electrical interface.
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