Glossary
Term | Main definition |
---|---|
Interconnect cabinet |
Cabinets containing connector panels, patch panels,
connectors, and patch cords to interface from inside
the plant to outside the plant. The interconnect cabinet
is used as an access point for testing and rearranging
routes and connections.
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Interconnection |
A connection scheme that provides direct access to the
cabling infrastructure and the capability to make cabling
system changes using patch cords.
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Interference |
(1) Fiber optic: the interaction of two or more beams of
coherent or partially coherent light. (2) Electromagnetic:
interaction that produces undesirable signals that interfere
with the normal operation of electronic equipment
or electronic transmission.
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Interlock armor |
A helical armor applied around a cable where the metal
tape sides interlock giving a flexible, yet mechanically
robust cable; specifically adds to the compression resistance
in optical fiber cables and acts as an EMI/RFI
shield in twisted-pair copper cables. The interlock armor
can be made of either aluminum (more common) or steel.
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Intermediate cross-connect (ICC) |
A cross-connect between first-level and second-level backbone
cabling. This secondary cross-connect in the backbone
cabling is used to mechanically terminate and administer
backbone cabling between the main cross-connect and
horizontal cross-connect (station cables).
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Intermediate distribution frame (IDF) |
A metal rack (or frame) designed to hold the cables that
connect interbuilding and intrabuilding cabling. The IDF
is typically located in an equipment room or telecommunications
room. Typically, a permanent connection exists
between the IDF and the MDF.
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International Organization for Standardization (ISO) |
The standards organization that developed the OSI
model. This model provides a guideline for how communications
occur between computers. See www.iso.org for
more information.
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International Telecommunication Union (ITU) |
The branch of the United Nations that develops communications
specifications.
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International Telephone and Telegraph Consultative Committee (CCiTT) |
International standards committee that develops standards
for interface and signal formats. Currently exists
as the ITU-T.
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Internet Architecture Board (IAB) |
The committee that oversees management of the
Internet, which is made up of several subcommittees
including the Internet Engineering Task Force (IETF), the
Internet Assigned Numbers Authority (IANA, which is
now known as ICANN), and the Internet Research Task
Force (IRTF). See www.iab.org for more information.
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Internet Engineering Task Force (IETF) |
An international organization that works under the
Internet Architecture Board to establish specifications
and protocols relating to the Internet. See www.ietf.org
for more information.
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Internet Research Task Force (IRTF) |
An international organization that works under the
Internet Architecture Board to research new Internet
technologies. See www.irtf.org for more information.
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Internetworking, Internetwork |
Involves connecting two or more computer networks via
gateways using a common routing technology. The result
is called an internetwork (often shortened to internet).
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Interoffice facility(IOF) |
A communication channel of copper, fiber, or wireless
media between two central offices. Often, IOF refers to
telephone channels that can transport voice and/or data.
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Intersymbol interference (ISI) |
Form of distortion in digital communications systems.
ISI is caused by multipath propagation and nonlinear
frequency response of a channel resulting from not having
enough bandwidth. ISI leads to BER and causes the
loss of the channel to increase.
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