本发明从根本上保证了以太网无源同轴网络（EPCN）系统中上行数据传输的安全性，大大提高 了业务服务质量。
The method of the invention guarantees the safety of the ascending data transmission in the Ethernet passive coaxial network (EPCN) system from the root, and the service quality is greatly improved.
本发明从根本上保证了以太网无源同轴网络（EPCN）系统中上行数据传输的安全性，大大提高 了业务服务质量。
The method of the invention guarantees the safety of the ascending data transmission in the Ethernet passive coaxial network (EPCN) system from the root, and the service quality is greatly improved.
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