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Jump Back in Time 重建时期 (1866-1877)
Alexander Graham Bell's design sketch of the telephone, ca. 1876.

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因为他对科技向来就有好奇心,贝尔接着还发明了许多东西,包括1880年发明的影相电话 (photophone) 。这是第一支无线电话,通过光波传递声音,而不再使用电缆。这可说是现代使用光纤的无线电话系统的老祖先。

Inspired by his scientific curiosity, Bell went on to create other new inventions, including the photophone in 1880. This first wireless telephone transmitted sound on a beam of light instead of electrical wires. It is the forefather of the cordless phone and 80% of today's telephone systems that use fiber optics.
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