Application (in terms of cabling infrastructure) – A system the transmission method of which is supported by telecommunications cabling, such as a 100base-TX Ethernet, or digital voice. 2. Unshielded Twisted-Pair – (UTP) a pair of copper wires twisted together with no electromagnetic shielding around them. Each wire pair is twisted many times per foot to cancel out electrical signal. 3. Shielded Twisted-Pair – A type of twisted pair cable in which the pairs are enclosed in an outer braided shield, although individual pairs may also be shielded.
4. Fiber-Optic Cable – An optical fiber cable is a cable containing one or more optical fibers. The optical fiber elements are typically individually coated with plastic layers and contained in a protective tube suitable for the environment where the cable will be deployed. Optical fiber consists of a core and a cladding layer, selected for total internal reflection due to the difference in the refractive index between the two 5. Dark Fiber – An unused fiber; a fiber carrying no light. Common when extra fiber capacity is installed.
6. Coaxial Cable – commonly used for cable TV and old Ethernet; it is called coaxial because it has a single conductor surrounded by insulation and then a layer of shielding (which is also a conductor).
The Essay on Fiber Optics- Definitions
1.Crosstalk – The coupling or transfer of unwanted signals from one pair within a cable to another pair. Crosstalk can be measured at the same (near) end or far end with respect to the signal source. Crosstalk is considered noise or interference and is expressed in decibels. 2.Waveguides – A structure that guides electromagnetic waves along their length. The core fiber in an optical-fiber cable is ...
7. Plenum – the empty space between walls and drop ceilings 8. Riser – A space for indoor cables that allow cables to pass between floors, normally a vertical shaft or space. 9. Rip Cord – A length of string built into optical fiber cable that is pulled to split the outer jacket of the cable without using a blade.
10. Core – the central part of a single optical fiber in which the light signal is transmitted. 11. Attenuation –A general term indicating a decrease in power (loss of signal) from one point to another. This loss can be a loss of electrical signal or light strength. 12. Noise – In a cable or circuit, any extraneous signal that interferes with the desired signal normally present in or passing through the system. 13. Headroom – The number of decibels by which a system exceeds the minimum defined requirements.
14. ANSI – American National Standards Institute; A privet nonprofit membership organization sustained by its membership to encourage compliance with standards and methods. 15. NFPA – National Fire Protection Association; The NFPA mission is to help reduce the risk of fire though codes, safety requirements, research, and fire-related education. 16. FCC – Federal communications commission. The federal agency responsible for regulating broadcast and electronic communications in the United States. 17.
NIST – National Institute of standards and Technology; assisting the improvement and development of manufacturing technology, improving quality and reliability and encouraging scientific discovery. 18. OSHA – Occupational Safety and Health Administration passes laws designed to protected employees from many types of job hazards. 19. Equipment Room – A centralized space for telecommunications equipment that serves the occupants of the building or multiple buildings in a campus environment. 20. Topology – The geometric physical or electrical configuration describing a local communicating network.
