当前，有线电视用户采用非法手段盗用有线电视信号、拖欠电视收视维护管理费甚至故意破坏有线电视传输网络设施等违章违法行为还比较普遍。
Nowadays, it is common that some CATV users embezzle CATV signal illegally, delay paying for CATV maintenance management, and destroy CATV transmission network infrastructure intentionally.
然而当前数字信号处置和盘算机网络传输技术的迅猛发铺却使数据的版权维护面临严峻的挑战。
However, the currently rapid development of digital signal processing and Internet transmission techniques have threatened the copyright of digital data severely.
它可以同时测试语音、数据和视频信号的光功率值并给出判断，是PON网络工程、施工和维护的理想选择。
This power meter is able to simultaneously test and estimate the signals of the voice, data and video. It is an essential and ideal tool for the construction and maintenance of the PON projects.
网络管理和维护信号n MM ？
网络管理和维护信号n MM ？
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