Glossary
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EDR
enhanced digital return. See bdr.
EIA
Electronic Industries Alliance (formerly Electronic Industries Association). A United States
association that provided standards for use between manufacturers and purchasers of
electronic products until ceasing operations in February 2011. EIA standards continue to be
recognized in the telecommunications industry.
EMC
electromagnetic compatibility. A measure of equipment tolerance to external electromagnetic
fields.
EMT
externally-modulated transmitter.
ESD
electrostatic discharge. Discharge of stored static electricity that can damage electronic
equipment and impair electrical circuitry, resulting in complete or intermittent failures.
H
HD
high density.
I
I/O
input/output.
ICIM
intelligent communications interface module.
IP
Internet Protocol. A standard that was originally developed by the United States Department
of Defense to support the internetworking of dissimilar computers across a network. IP is
perhaps the most important of the protocols on which the Internet is based. It is the standard
that describes software that keeps track of the internetwork addresses for different nodes,
routes, and outgoing/incoming messages on a network. Some examples of IP applications
include email, chat, and web browsers.
L
LCD
liquid crystal display. A display medium made of liquid crystal. Liquid crystal's reflectance
changes when an electric field is applied. Commonly used in monitors, televisions, cell
