Name: Jeremiah Edison D. Pascua Course & Year: BSIT-3 Date Submitted: June 24‚ 2013 1. Twisted Pair Wire Physical Specification: -Twisted pair wire is a type of wiring in which two conductors of a single circuit are twisted together for the purposes of canceling outelectromagnetic interference (EMI) from external sources; for instance‚ electromagnetic radiation from unshielded twisted pair (UTP) cables‚ and crosstalk between neighboring
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necessary to complete an acceptable installation of the horizontal and riser data communications cabling plant. This is to include‚ but is not necessarily limited to‚ faceplates‚ modular jacks‚ connectors‚ data patch panels‚ equipment racks‚ cable and fiber optics. Work Included: 1. Work shall include all components for both a horizontal and riser data cable plant from workstation outlet termination to wire-room terminations. All cable-plant components‚ such as outlets‚ wiring-termination blocks
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The horizons of optical networks are much more than high speed physical layer transport. An intelligent optical network design must include higher network layer considerations. This is the only book currently on the market that addresses optical networks from the physical layer to the network layer and should be valuable for those who try to understand the intricacies of what optical networks can be. —Vincent Chan‚ Professor‚ MIT Department of Electrical Engineering and Computer Science This book
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List of the First 20 Elements and their Physical Properties Atomic Radii (pm) of the First 20 Elements: - Atomic radii decreases when moving down a period‚ as the number of protons increases‚ which thence increases the effective nuclear charge. - Atomic radii increases when moving down a group‚ as the number of shells increases‚ which thence increases shielding. - The downward-sloping pattern on the above graph shows the decrease in atomic radii down a period‚ and the sudden jumps
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Exercise 1: 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 an optical waveguide. 3. FTTH – (fiber-to-the-home): Fiber reaches
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CHAPTER 4 TRANSMISSION MEDIA 4.1 Guided Transmission Media Twisted Pair Coaxial Cable Optical Fiber 4.2 Wireless Transmission Antennas Terrestrial Microwave Satellite Microwave Broadcast Radio Infrared 4.3 Wireless Propagation Ground Wave Propagation Sky Wave Propagation Line-of-Sight Propagation 4.4 Line-of-Sight Transmission Free Space Loss Atmospheric Absorption Multipath Refraction 4.5 4.6 Recommended Reading and Web Sites Key Terms‚ Review Questions‚ and Problems Key Terms Review Questions
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connects to the main cable run. 4. Connectors- A device attached to the end of a cable‚ receiver‚ or light source that joins it with another cable‚ device or fiber. A connector is a mechanical device used to align and join two conductors or fibers together to provide a means for attaching and decoupling it to a transmitter‚ receiver‚ or another fiber. 5. Conduit- A rigid or flexible metallic or nonmetallic raceway of circular cross section in which cables are housed for protection and to prevent burning
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A splice is a permanent connection of two optical fibers. Once the two optical fibers are joined with a splice‚ they cannot be taken apart and put back together as they can if you join them using connectors. A splice is typically employed for one of three reasons: to repair a damaged cable‚ to extend the length of a cable‚ or to join two different cable types. (Andrew Olivier‚ 2011‚ p. 617) There are some things that can affect splicing performance. There is Cladding Diameter which occurs when the
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called ‘frequency-multiplexed voice band signals.’ A high voltage was put into the cables and amplifiers were placed at intervals along the cable. Many of these cables can be used today‚ but the limited bandwidth makes them impractical. In the 1980s‚ fiber optic cables were developed and rapidly replaced older technologies. Modern
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the computers. It is defined as a subset of telecommunication involving the transmission of data to and from computers and components of computer systems. More specifically data communication is transmitted via mediums such as wires‚ coaxial cables‚ fiber optics‚ or radiated electromagnetic waves such as broadcast radio‚ infrared light‚ microwaves‚ and satellites. Data Communications = Movement of computer information by means of electrical or optical transmission systems Information can be represented
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