随着光传送网络/分组增强型光传送网络（OTN/POTN）技术的规模部署应用，OTN/POTN必然要面临承载频率和时间同步信号的问题。文章提出一种基于1588+SyncE同步的现网测试方法，通过在源端OTN/POTN设备上配置额外的光监控信道板卡和时钟接口板，并采用逐点方式对同步信号进行本地环回测试，该方案解决了异地测试基准带来的测量误差问题，同时摆脱了测试源头和测试参考点的限制，可以根据实际需要在OTN/POTN系统的任一节点进行测试，降低了测试成本。

With the large-scale deployment of Optical Transport Network/Packet-enhanced Optical Transport Network （OTN/POTN） technology, the problem of bearing frequency and time synchronization signal in OTN/POTN occurs. This paper proposes a test method based on 1588+SyncE synchronous network. Through the configuration of additional Optical Supervisory Channel （OSC） board and clock interface board in source OTN/POTN equipment, and the point by point method was used for the synchronous signal to be tested in a local loopback mode. This scheme solves the problem of measurement error due to remote testing, while removing the restriction of test source and test reference point, and can be tested at any node of the OTN/POTN system according to actual needs, reduce the cost of testing.