The total lance of long distance optical cable increases by 27000 sheet km, that of digital microwave links by 14,400 km and the number of telephone lines by 19.61 million.

新增长途光缆27000皮长/公里，数字微波干线14400公里，电话交换机容量1961万门。

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The total lance of long distance optical cable increases by 27000 sheet km, that of digital microwave links by 14, 400 km and the number of telephone lines by 19.61 million.

新增长途光缆27000皮长/公里，数字微波干线14400公里，电话交换机容量1961万门。

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The new fluoride optical fibre is only a little bigger around than a human hair, yet each could carry 10,000 telephone messages at one time for thousands of kilometers.

这种新的氟化光导纤维只比人的头发粗一点点，然而每一条这种纤维都可以在一千公里内同时传输10,000条电话讯息。

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Telephone companies, such as Verizon, are rolling out optical fibre to the home to do the same.

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There are many older optical fibers, but low-light-loss ones are vital for telephone cable.

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