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波分复用(Wavelength-Division Multiplexing,WDM)技术的发展大大提高了通信网络的传输容量,将成为下一代骨干网络的核心传输方式。在WM系统光网元设备之间的通信方法中,较多的是采用光监控信道(OSC)和调顶技术(PilotTone),但是这两种方法的固有缺陷在城域波分系统不可避免,从而引出电监控信道(ESC)—适用于城域波分系统的基于业务开销中现有的DCC字节来进行网元之间通信的一种实现方法。该方法易于实现、可靠性高,有效降低了系统成本,提高了系统资源利用率,有较好的应用前景。
The development of Wavelength-Division Multiplexing (WDM) technology has greatly increased the transmission capacity of communication networks and will become the core transmission mode for the next generation of backbone networks. In the WM system optical network element communication between devices, the more is the use of optical monitoring channel (OSC) and tune the top technology (PilotTone), but the inherent shortcomings of these two methods in the metro wavelength division system is inevitable, Leading to an electrical supervisory channel (ESC) -an implementation of the metro WDM system based on the existing DCC bytes in the service overhead for communication between network elements. The method is easy to implement, has high reliability, effectively reduces system cost, improves system resource utilization rate, and has better application prospect.