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本文介绍了微波ＰＤＨ监控系统的早期发展和进一步发展以及微波ＳＤＨ网管系统，着重于体系结构的介绍。无论是微波ＰＤＨ监控系统，还是微波ＳＤＨ网管系统，在系统体系结构中都设计了前端机，由此可见前端机在系统设计中的重要性。
This article describes the early development and further development of microwave PDH monitoring system and microwave SDH network management system, focusing on the introduction of the architecture. Both the microwave PDH monitoring system and the microwave SDH network management system have designed the front-end system in the system architecture. This shows the importance of the front-end system in the system design.