Another important use of telecommunication satellites was demonstrated in 1974 when the "Teacher in Sky" satellite transmitted educational programs to classes in remote areas of the United States.

1974年，美国“空中教师”卫星把教育节目传送到了偏远地区的教室，这说明了通信卫星的另一个重要用途。

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Based upon existing optic fiber cable telecommunication, this article puts forward using wavelength division multiplex technology for remote image transmission without adding communication line.

文章提出在原有光纤光缆电信传输业务基础上，不增加通信线路，利用光纤波分复用技术实现局、矿远程图象传输。

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With the enlargement of the scale of power system, the traditional telecommunication equipment used in distribution remote terminal stage can't meet the demand of distribution automation system.

随着电力系统规模的不断扩大，传统的用于配电网终端级的远动通信装置不能满足配电自动化系统的要求。

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