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On This Day: Optical fiber is first used to carry live telephone traffic. - Illustration on Sermon | IllustrateTheWord

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On This Day: Optical fiber is first used to carry live telephone traffic.

Source: Today in History (history.muffinlabs.com) - CC BY-SA 3.0Short12 words

4/22 (1977): Optical fiber is first used to carry live telephone traffic.

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