Chapter 6 - glossary, 2262 glossary – CANOGA PERKINS 2262 T1/E1 Fiber Optic Modem User Manual
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Canoga Perkins
2262 T1/E1 Fiber Optic Modem
6. 2262 Glossary
BNC
Bayonet Connector
CAD/CAM
Computer-Aided Design/Computer-Aided
Manufacturing
Collimation
The process by which a divergent or conver-
gent beam of radiation is converted into a beam
with the minimum divergence possible for that
system (ideally, a parallel bundle of rays).
CSU
Channel Service Unit
dB
Decibel. A standard unit used to express gain
or loss of optical power.
E1
Transmission at 2.048Mbps.
FC
Fiber Optic Connector (developed by NTT)
LED
Light Emitting Diode. A semiconductor
device which emits incoherent light formed at
the -N junction, either from the junction stripe
edge or its surface.
Multimode Fiber
An optical fiber with a core diameter of 25 to
200 microns. The core is much larger than
single mode fiber and allows several beams of
light to be passed through it.
nm
nanometer (10
-9
meters)
PBX
Private Branch Exchange