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Figure 4.1 |
Illustration of twisted pair wiring. A plastic coating on the surface of each wire prevents the metal in one wire from touching the metal in the other. The twists help reduce interference. |
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Figure 4.2 |
Enlarged cross-section of a coaxial cable with major parts identified. Although a coaxial cable is stiffer than a single wire, it can be bent. |
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Figure 4.3 |
Illustration of a satellite used to provide communication across an ocean. The satellite receives radio signals from one ground station, and transmits them to another. |
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Photo 1_001 |
Modem showing RS-232 connector |
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Photo 1_014 |
Twisted pair wiring with RS-232 connector |
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Photo 1_024 |
Twisted pair wiring with RS-232 connector |
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Photo 1_033 |
Optical fiber cables connected to an ATM switch |
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Photo 1_034 |
Optical fiber connections into an ATM NIC |
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Photo 1_049 |
Base-station antenna for a wireless radio-frequency network |
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Photo 1_059 |
Optical fiber and connectors |
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Photo 1_061 |
Optical fiber and connectors with protective covers installed |
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Photo 1_062 |
Optical fiber cables connected to an ATM switch |
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Photo 2_002 |
Optical fiber patch panel |
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Photo 2_003 |
Optical fiber patch panel |
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Photo 2_004 |
The rack at the right of the picture holds optical fiber patch panels |
