TAILIEUCHUNG - Fiber Optics Illustrated Dictionary - Part 56

The Fiber Optics Illustrated Dictionary - Part 56 fills a gap in the literature by providing instructors, hobbyists, and top-level engineers with an accessible, current reference. From the author of the best-selling Telecommunications Illustrated Dictionary, this comprehensive reference includes fundamental physics, basic technical information for fiber splicing, installation, maintenance, and repair, and follow-up information for communications and other professionals using fiber optic components. Well-balanced, well-researched, and extensively cross-referenced, it also includes hundreds of photographs, charts, and diagrams that clarify the more complex ideas and put simpler ideas into their applications context | Fiber Optics Illustrated Dictionary Joint Utility Pole Examples A terminal end utility pole. Wires are aerially strung to only one side of the pole and a guy supports the other side. The lines on end poles may be terminated or may feed into a vertical conduit for connection to nearby underground wiring facilities. A mid-block utility pole in which wires are supported and passed on to the next pole in the path and to the nearby buildings of local utility subscribers. Not all poles have transformers but three are shown here in cylindrical metal housings. Joint Utility Poles These two photographs illustrate somewhat different utility poles located several blocks apart. The one on the left is a terminating pole connecting conducting wires on only one side of the pole with conduits for channeling lines to the ground. The pole on the right is a more common mid-block pole that primarily supports the lines and passes them along to the next pole and to local utility subscribers without ending the connections or directing them earthward. Both poles include a variety of wires cables insulators and transforming devices. In spite of their geographic and functional differences these two poles clearly have many common structural characteristics arising from various joint utility pole regulations and agreements. Most of the structural aspects have been worked out over the decades based upon electrical characteristics and safety and maintenance needs. Recently the role of joint utility poles has become more complex. Not only has the demand for phone services increased but additional types of media including copper-based high-speed data lines and fiber optic cables have been added to the joint pole hierarchy often severely stretching the space and weight limitations of joint poles especially in densely populated urban areas. The problems of interference have increased as well. High-speed copper data lines for example have special needs that are different from voice lines. The .

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