Alcatel-Lucent 1830 PSS-16 Maintenance And Trouble-Clearing User Manual page 693

Glossary
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channel
A communications path or the signal sent over that path.
channel add/drop card (CAD)
Used with automatic power management; allows setpoints for a manual transmission line.
channel optical filter (COF)
COF cards facilitate the WaveKey encoding function, employed at service endpoints.
chromatic dispersion
The effect describing the velocity dependence of light travelling through a medium, depending on
its wavelength. For optical telecommunication signals, this effect causes the light pulses to spread
out and the resulting distortion in pulse shape degrades the signal quality.
CIDR
See "classless inter-domain routing" (p. GL-5)
CIT
See "craft interface terminal" (p. GL-6)
cladding
Material that surrounds the core of an optical fiber that has a lower index of refraction compared
to that of the core. The lower index of refraction causes the transmitted light to travel down the
core.
classless inter-domain routing (CIDR)
CLEI
See "common language element identifier" (p. GL-5)
CN
See "control network" (p. GL-6)
CO
See "central office" (p. GL-4)
coarse wavelength division multiplexing (CWDM)
CWDM is the method of combining multiple signals on laser beams at various wavelengths for
transmission along fiber optic cables. The number of channels is fewer than in dense wavelength
division multiplexing (DWDM), but more than in standard wavelength division multiplexing
(WDM).
COF
See "channel optical filter" (p. GL-5)
common language element identifier (CLEI)
CLEI codes enable you to clearly and consistently identify and track virtually every type of
telecommunications equipment. In the United States, these codes are assigned by Telecordia, and
are 10 bytes long.
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1830 PSS-36/PSS–32/PSS-16/PSS-4
8DG60888CAAA Release 3.6.0 and 3.6.1
Issue 1 June 2011
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GL-5