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1837 Samuel Morse : Sir William Cooke Sir Charles Wheatstone .

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1858 1866 .*

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1862 Lincoln . .

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1861 Johan Philip Reis Alexander Graham Bell 1876 Thomas Watson . : .

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1900 . . .

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1939 . 25 . .

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Fax . . The Vacuum Tubes. 1907 Lee De Forest Amplifying Triode Tube

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. : Sheilded Coaxial Twisted.

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Open Wire Single Wire 4 . .

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Unshielded Twisted Pair (UTP) Cable . UTP . . .

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EIA/TIA (Electronic Industry Association/Telecommunication Industry Association) 6

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Shielded Twisted Pair (STP) Cable UTP . STP . .

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: . . .

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. . 10Base2 Thinnet 10Base5 Thicknet 185 500 . .*

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: (Core): (fiber) . (Cladding): .

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(Buffer Coating): , . Jacket PVC*

(Single-Mode Fiber). 9 , 1300 1550 . (Multi-Mode Fiber). 62.5 , 850 1300 (Light Emitting Diodes LED).*

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