论文部分内容阅读
本地网具有传输网由PDH和SDH组成及局间中继以光缆为主要传输介质两大特点 ;技术方面 ,WDH网将随着节点设备、波长转换器网管系统、光层上的保护及一些关键器件的进一步发展而逐步走向成熟 ;市场需求和业务需求是WDM技术进入本地传输网的原动力。
The local network has a transmission network composed of PDH and SDH and the interoffice relay takes the optical cable as the main transmission medium. In terms of technology, the WDH network will be protected with node devices, wavelength converter network management systems, optical layers and some key The further development of devices and gradually mature; market demand and business needs is the driving force behind the WDM technology into the local transmission network.