Glossary
Term | Main definition |
---|---|
Cut-through resistance |
A material
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Cutback |
A technique or method for measuring the optical attenuation
or bandwidth in a fiber by measuring first from the
end and then from a shorter length and comparing the
difference. Usually one is at the full length of the fiberoptic
cable and the other is within a few meters of the
input.
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Cutoff wavelength |
For a single-mode fiber, the wavelength above which
the operation switches from multimode to single-mode
propagation. This is the longest wavelength at which a
single-mode fiber can transmit two modes. At shorter
wavelengths the fiber fails to function as a single-mode
fiber.
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Cycles per second |
The count of oscillations in a wave. One cycle per second
equals a hertz.
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Cyclic redundancy check (CRC) |
An error-checking technique used to ensure the accuracy
of transmitting digital code over a communications
channel after the data is transmitted. Transmitted messages
are divided into predetermined lengths that are
divided by a fixed divisor. The result of this calculation
is appended onto the message and sent with it. At the
receiving end, the computer performs this calculation
again. If the value that arrived with the data does not
match the value the receiver calculated, an error has
occurred during transmission.
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