- advantages
- sufficient frequency range to support multiple channel, which allows for much greater throughput.
- lower error rates. because the inner conductor is in a Faraday shield, noise immunity is improved, and coax has a lower error rates and therefore slightly better performance than twisted pair.
- greater spacing between amplifiers coax's cable shielding reduces noise and crosstalk, which means amplifiers can be spaced farther apart than with twisted pair.
- more expensive to install compare to twisted pair cable.
- the thicker the cable, the more difficult to work with.
- advantages
- system performance
- greatly increased bandwidth and capacity
- lower signal attenuation (loss)
- immunity to electrical noise
- immune to noise (electromagnetic interference and radio frequency interference)
- less restrictive in harsh environments
- overall system economy
- fiber optic component are expensive
- fiber optic transmitters and receivers are still relatively expensive compared to electrical interfaces
- the lack of standardization in the industry has also limited the acceptance of fiber optics.
- advantages
- using telephone wires are their relative low cost and their availability
- handled a data flow of up to approximately one megabit per second (Mbps) over several hundred feet
- small local area network with a limited number of users, twisted pair is an ideal choice because it is both inexpensive and easy to install.
- susceptibility to signal distortion errors and the relatively low transmission rates they provide over long distances.
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ReplyDeleteA fiber-optic system is similar to the copper wire system that fiber-optics is replacing. The difference is that fiber-optics use light pulses to transmit information down fiber lines instead of using electronic pulses to transmit information down copper lines. Looking at the components in a fiber-optic chain will give a better understanding of how the system works in conjunction with wire based systems.At one end of the system is a transmitter. This is the place of origin for information coming on to fiber-optic lines. The transmitter accepts coded electronic pulse information coming from copper wire. It then processes and translates that information into equivalently coded light pulses.Think of a Fiber Cable in terms of very long cardboard roll (from the inside roll of paper towel) that is coated with a mirror on the inside.If you shine a flashlight in one end you can see light come out at the far end - even if it's been bent around a corner.
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