When was the first fiber optic cable lit for commercial purposes?

And, how many miles of fiber were installed in Q1 2014?

Answer:  April 22, 1977, General Telephone and Electronics sent the first live telephone traffic through fiber optics at a 6 Mbit/s throughput in Long Beach, California. The first transatlantic cable to use optical fiber went into operation in 1988. In Q1 2014, 41 million fiber-miles were installed globally.

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