Operations Manual
glossary-6 © 1999 Triton Network Systems, Inc. All Rights Reserved.
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far-end IFU
a) IFU at the other end of the link in the network (during site evaluation).
b) Second IFU installed in a linked pair of IFUs.
See also near-end IFU.
Fast Ethernet
Generic term for a IEEE standard network 100 Mbps transmission protocol.
fault management
Software that reports and identifies the source of network faults.
fiber optics
Technology in which information is transmitted as light impulses from one
point to another through extremely thin glass or plastic wire or fiber.
fixed wireless system
Communication system that uses radio spectrum to provide services to
locations that are not mobile.
forward error correction
A system in which redundant information is generated at the transmitted end
so that the receiving unit can detect, locate, and correct any errors before
delivering the transmission.
free space propagation loss
Normal signal attenuation of radio waves transmitted through free space. Free
space loss increases logarithmically with increased hop distance.
Fresnel zone
A defraction zone around the line-of-sight path between two points as shown
in the following illustration.
The line-of-sight, including the Fresnel zone, must be clear of obstructions to
ensure communication between the IFUs.
2 Miles
Fresnel Zone