A) Telex
B) Memex
C) CompuServe
D) Bell 103 dataset
E) Data phone
Correct Answer: E
Solution :
[e] In 1960, AT&T designed its Data phone, the first commercial modem, specifically for converting digital computer data to analog signals for transmission across its long distance network. Outside manufacturers incorporated Bell Laboratories" digital data sets into commercial products the development of equalization techniques and band width-conserving modulation systems improved transmission efficiency in national and global systems.
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