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Specifications – Definitions Essay

Define the following terms:

Application (in terms of cabling infrastructure) : It refers to the intended use of the cabling system being installed. Unshielded Twisted – Pair: It’s a type of cable that consists of several conducting cores twisted together in pairs with no surrounding shield. Shielded Twisted- pair: It’s a type of cable that consists of several conducting cores twisted together in pairs surrounded by a shield inside the jacket. Dark Fiber: Unlit fiber Optics, also the name given to fiber optics lines that are available for lease. Coaxial Cable: Consists of an inner core conductor surrounded by dielectric insulation surrounded by a conducting shield Plenum: Part of a building that facilitate air circulation for heating and Air conditioning. Riser: Cable used to run between floors in non-plenum spaces. Rip Cord: Strong yarn used to remove the jacket of a cable.

Core: Main conductor of a cable.
Attenuation: refers to signal loss measured in decibels.
Noise: Electrical interference.
Headroom: Is the ratio between attenuation and crosstalk.

ANSI: American National Standards Institute; is a voluntary organization composed of over 1,300 members (including all the large computer companies) that creates standards for the computer industry. (from http://www.webopedia.com/TERM/A/ANSI.html) NFPA: National Fire Protection Association; The company’s mission is to reduce the worldwide burden of fire and other hazards on the quality of life by providing and advocating consensus codes and standards, research, training, and education. (from www.nfpa.org/about-nfpa/overview) FCC: The Federal Communications Commission is an independent agency of the United States government, created by Congressional statute to regulate interstate and international communications by radio, television, wire, satellite, and cable in all 50 states, the District of Columbia and U.S. territories. (from en.wikipedia.org/wiki/Federal_Communications_Commission)

NIST: National Institute of Standards and Technology; is a measurement standards laboratory, also known as a National Metrological Institute (NMI), which is a non-regulatory agency of the United States Department of Commerce. (from en.wikipedia.org/wiki/National_Institute_of_Standards_and_Technology) OSHA: The United States Occupational Safety and Health Administration (OSHA) is an agency of the United States Department of Labor. Congress established the agency under the Occupational Safety and Health Act, which President Richard M. Nixon signed into law on December 29, 1970. (from en.wikipedia.org/wiki/Occupational_Safety_and_Health_Administration). Equipment Room: The space on a building used for electrical equipment and electronic devices. Topology: Placement of components devices and cables.

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