Telecommunications is today widely understood to mean the electrical means of
communicating over a distance. The first form of telecommunications was that of
the Telegraph, which was invented quite independently in 1837 by two scientists,
Wheatstone and Morse. Telegraphy was on a point-to-point unid ...
/dl/522183.html
标签：
Telecommunications
Understanding
Networks
上传时间：
2020-06-01
上传用户：shancjb
