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iDEN (integrated digital enhanced network)
A Motorola Inc. enhanced specialized mobile
radio network technology that combines two-way radio,
telephone, text messaging and data transmission
into one network.
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ILEC (incumbent local exchange carrier)
The historic local phone service provider in
a market, often a former Bell company. Distinct
from CLECs, competitive local exchange carriers,
new market entrants.
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Immunity
Immunity has special meaning in a 911 context.
No CMRS or 911 provider, its employees, officers
or agents is criminally liable or liable for any
damages in a civil action for injuries, death or
loss to person or property resulting from any act
or omission in connection with the development,
adoption, implementation, maintenance, enhancement
or operation of E911 service, unless such damage
or injury was intentional or the result of gross
negligence or willful or wanton conduct.
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IMT-2000
The International Telecommunication Union's
name for the new third generation global standard
for mobile telecommunications.
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Interconnection
The connecting of one network with another,
e.g. a cellular carrier's wireless network with
the local exchange.
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Interoperability
The ability of a network to operate with other
networks, such as two systems based on different
protocols or technologies.
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IS
(Interim Standard)
A designation of the American National Standards
Institute--usually followed by a number—that refers
to an accepted industry protocol; e.g, IS-95, IS-136,
IS-54. IS-41: The network standard that allows all
switches to exchange information about subscribers.
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IS-54:
The first generation of the digital standard
time division multiple access technology.
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IS-95:
The standard for code division multiple access.
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IS-136:
The latest generation of the digital standard
time division multiple access technology.
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IS-661:
North American standard for 1.9 GHz wireless
spread spectrum radio-frequency access technology
developed by Omnipoint Corp. IS-661, for which
Omnipoint was awarded a pioneer's preference
license for the New York City market, is based
on a composite of code division multiple access
and time division multiple access technologies.
The company says IS-661 reduces infrastructure
costs and allows higher data speeds than mainstream
GSM or TDMA platforms.
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ISDN (integrated services digital network)
An advanced, high-capacity wireline technology
used for high-speed data transfer.
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ITU (International Telecommunication Union)
An agency of the United Nations, headquartered
in Geneva, that furthers the development of telecommunications
services worldwide and oversees global allocation
of spectrum for future uses.
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Ka-Band
Radio spectrum in the 18 GHz to 31 GHz range
used by satellite communications systems.
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Ku-Band
Radio spectrum in the 10.9 GHz to 17 GHz range
used by satellite communications systems.
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LEC (local exchange carrier)
A wireline phone company serving a local area.
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LEO (low-earth orbit)
A mobile communications satellite between 700
and 2,000 kilometers above the earth.
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LMDS (local multipoint distribution service)
Located in the 28 GHz and 31 GHz bands, LMDS
is a broadband radioservice designed to provide
two-way transmission of voice, high-speed data and
video(wireless cable TV). FCC rules prohibit incumbent
local exchange carriers and cable TV companies from
offering in-region LMDS.
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LNP (local number portability)
The ability of subscribers to switch local or
wireless carriers and still retain the same phone
number, as they can now with long-distance carriers.
Wireless carriers don't have to offer LNP until
March 2000 and want the deadline further postponed.
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Local calling area
The region across which the call is truly local,
involving no toll charges.
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LSGAC (Local-State Governmental Advisory Committee)
An FCC-established group that is working on
an antenna-siting solution. The LSGAC will advise
carriers and communities on antenna siting.
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