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Glossary 61
Installation and Networking Guidelines for Optical Routing
NDSF
non-dispersion-shifted fiber
A type of optical fiber optimized for the 1310 nm transmission window.
nanometer
See nm.
nm
nanometer
One billionth of a meter (10
-9
meter). A unit of measure commonly used to
express the wavelengths of light.
node
A point in an optical network where optical signals can be processed and
switched among various links.
NZDSF
non-zero-dispersion-shifted fiber
A type of optical fiber optimized for high bit-rate and dense
wavelength-division-multiplexing applications.
OADM
optical add/drop multiplexer
An optical multiplexer/demultiplexer (mux/demux) that adds or drops one
CWDM channel of the same wavelength from the optical fiber and allows all
other wavelengths to pass straight through.
O/E
optical to electrical
Optical to electrical conversion.
OC
optical carrier
Series of physical protocols, such as OC-1, OC-2, and OC-3, defined for
SONET optical signal transmissions. OC signal levels put STS frames onto
fiber-optic line at a variety of speeds. The base rate is 51.84 Mbit/s (OC-1);