In DVB satellite transmission system used QPSK, using QAM cable transmission, terrestrial transmission using COFDM (coded orthogonal frequency division multiplexing) way.

在DVB系统中卫星传输采用QPSK，有线传输采用QAM方式，地面传输采用COFDM(编码正交频分复用)方式。

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Considering for local current situation of network in CangZhou city, mainly analyzed constructing standard and implementary scheme of HFC cable distribution system two-way transformation.

结合沧州市网络的实际情况，主要分析HFC电缆分配系统双向传输改造的建设标准和实施方案。

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Server refers to receive bedside monitoring devices, data devices, in-system. Monitoring system was carefully observed in the physical layer using RJ45 and five non-shielded cable way linking.

服务器指吸取床边监护装备数据的仪器，在这里为本体系，监护网络体系的物理层采用RJ45方法接茬和五类非屏蔽双绞线毗连。

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"In the past week, our global monitoring system has picked up indications that this cable has finally been activated, although in a rather curious way, " wrote Doug Madory, Renesys' senior researcher.

BBC: 'Curious' Cuban net cable has activated, researchers say