Topics: Optical fiber, Ethernet, Dispersion Pages: 4 (932 words) Published: March 25, 2013
Define the following terms:

1. Horizontal Cable : A type of inside cable designed for horizontal use in non-plenum areas. While horizontal cable must be fire retardant, the National Electrical Code (NEC) specifications are not as demanding as those governing the use of plenum cable or riser cable. See also NEC, plenum, plenum cable, and riser cable.

2. Backbone Cable : Backbone cabling is the inter-building and intra-building cable connections in structured cabling between entrance facilities, equipment rooms and telecommunications closets. Backbone cabling consists of the transmission media, main and intermediate cross-connects and terminations at these locations. This system is mostly used in data centers.

3. Patch Cords: a short cord with a plug at each end, or a plug at one end and a pair of clips at the other, used for temporarily connecting two pieces of equipment or signal paths.

4. Connectors: A device for holding two parts of an electrical conductor in contact.

5. Conduit: A tube or duct for enclosing electric wires or cable.

6. Racks: A computer rack (commonly called a rack) is a metal frame used to hold various hardware devices such as servers, hard disk drives, modems and other electronic equipment. Some may refer to a rack as "LAN or network furniture" as resembles a shelving structure where components can be attached vertically, stacked on top of one another. A computer rack can also be called a relay rack or open rack.

7. Punch-Down Blocks: is a type of electrical connection often used in telephony. It is named because the solid copper wires are "punched down" into short open-ended slots which are a type of insulation-displacement connectors. These slots, usually cut crosswise (not lengthwise) across an insulating plastic bar, contain two sharp metal blades which cut through the wire's insulation as it is punched down. These blades hold the wire in position and make the electrical contact with the wire as...
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