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Black Box Explains...Advantages of fiber optic line drivers..

Fiber optic line drivers are much better for communications than copper-wire alternatives because they offer three main advantages: superior conductivity, freedom from interference, and security.

Superior conductivity for increased performance
The glass core of a fiber optic cable is an excellent signal conductor. With proper splices and terminations, fiber cable yields very low signal loss and can easily support data rates of 100 Mbps or more.

Immunity to electrical interference
Because fiber optic line drivers use a nonmetallic conductor, they don’t pick up or emit electromagnetic or radio-frequency interference (EMI/RFI). Crosstalk (interference from an adjacent communication channel) is also eliminated, which increases transmission quality.

Signals transmitted via fiber optic line drivers aren’t susceptible to any form of external frequency-related interference. That makes fiber connections completely immune to damaging power surges, signal distortions from nearby lightning strikes, and high-voltage interference. Because fiber cable doesn’t conduct electricity, it can’t create electrical problems in your equipment.

Signal security
Electronic eavesdropping requires the ability to intercept and monitor the electromagnetic frequencies of signals traveling over a copper data wire. Fiber optic line drivers use a light-based transmission medium, so they’re completely immune to electronic bugging.
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