Unit 4: Definitions
Horizontal cabling: The cabling between and including the outlets and the horizontal cross-connect.
Backbone cabling: The cabling that connects between telecommunications rooms and equipment rooms. Patch cords: Any flexible piece of cable that connects one network device to the main cable run or to a patch panel.
Connectors: A device attached to the end of a cable, receiver, or light source that joins to another cable or device.
Conduit: A rigid or flexible metallic or nonmetallic raceway of circular cross section in which cables are housed for protection and to prevent burning cable from spreading flames or smoke in the event of a fire.
Racks: A frame-like structure where patch panels, switches, and other network equipment are installed.
Punch-Down blocks: A cross connect block where wires and punched in.
Consolidation Points: A location that extends from building pathways and horizontal cables that extends into work area pathways.
Crimpers: A tool used to install connectors on the ends of cables.
Fish tape: Tool used to route wiring through walls and electrical conduit.
Cable toner: A device for determining if the fundamental cable installation has been done properly. Continuity tester: A toll used to determine whether an electrical circuit can be made between to points.
Category 5e/6 cable: Enhanced CAT-5 and 6 have many improved specifications over CAT-5 with frequencies of 100MHz for 5e and 250 MHz for 6. Binder Groups: A group of 25 pairs of wires in a twisted pair cable with more than 25 total pairs.
Hybrid/Composite cable: Cable that contains fiber, coaxial and twisted pair conductors bundled in a common jacket. Pulling Cable: the act of properly pulling cable from a box or spool.
Wavelengths of Light: The distance and electromagnetic wave travels in the time it takes to oscillate through a complete cycle. EMI: Electrical noise generated in copper conductors when electromagnetic fields induce currents. Optical-fiber strand: fibers made up of glass or plastic that use light to transmit data.
Index of Refraction: The value given to a medium to indicate the velocity of light passing through it relative to the speed of light in a vacuum. Cable Jacket: the covering on the outside of a cable.
Cladding Size: the size of the material that is put around the core of an optical fiber during manufacture.
Multifiber Cables: Fiber optic cables with multiple fibers that are distinguished from one another by color-coded jackets or buffers on each fiber Differential Mode Delay: The total difference in travel time between the two polarization states of light traveling through and optical fiber.
Chromatic Dispersion: The spreading of a particular light pulse because of the varying refraction rates of the different colored wavelengths.