By Jim Hayes
Cabling is likely one of the quickest altering applied sciences, and information, Voice and Video Cabling, third variation, has been up to date to deal with the entire newest advancements in premises cabling, together with applied sciences and functions in copper, fiber, and instant cabling. this article is geared up to help within the knowing of cabling, by way of following a logical layout that covers history info on communications structures and media first, after which delves into extra specific discussions on every one media style: copper, instant, and fiber. setting apart the main ideas into particular sections additionally is helping to reduce confusion among the original set up practices one of the varied applied sciences. inside of each one part, issues development from the fundamentals to elements, set up, and checking out to help within the improvement of person abilities. This e-book additionally offers readers with very important history and assets concerning the newest cabling criteria, that are an essential component of this fast moving undefined.
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Extra info for Data, Voice and Video Cabling, 3rd Edition
The connection is made by pushing the wire into a sharp slot in a metal terminal. 46 CHAPTER 4 — STRUCTURED CABLING The terminal slices through the insulation and into the wire, making a good electrical contact. The pierced insulation provides a good seal, preventing degradation of the contact. Modular connectors and punchdown blocks all use this termination method, because it is reliable and simple to field-terminate. When terminating cables to modular connectors (plugs or jacks), it is important to maintain the twist in the cable pairs as close to the connector as possible to ensure proper performance at high speeds.
The types of signals that are sent through the network and the speed at which they are sent are extremely important details of a network. All parts of the system must be coordinated together to send, carry, and receive the same types of signals. Usually, these details are not something that you have to consider as long as all parts of your network come from, or at least are specified by, the same vendor or were designed to the same industry standard. Because networking evolved over several decades, many different cabling solutions have been used.
As the marketplace and most vendors adopted UTP as the cabling type of choice, it became a de facto standard in the marketplace first and a de jure standard by vendor agreement later. 8 committee. Although it is not a mandatory standard, but a voluntary interoperability standard developed by the vendors of the products covered under the standard, it is a commonsense approach to communications cabling that allows simplified interoperability and upgrading. 35 36 CHAPTER 4 — STRUCTURED CABLING STANDARDS FOR NETWORK CABLING The Origins of Standards Widespread usage of any technology depends on the existence of acceptable standards.