By John R. Vacca
The Cabling instruction manual, moment version is an intensive, up to date professional's advisor to each point of LAN and telecommunications cabling, from making plans via set up and administration. From type five twisted pair to the most recent fiber-to-the-desktop suggestions, it is all right here: criteria, product comparisons, topology and structure layout, electric and security issues, and extra. This new moment variation has been up to date with large new assurance of fiber applied sciences, domestic networking, cable modems, and lots of different key issues. It bargains professional suggestions for each step of the cabling method lifecycle, from making plans and specification, to picking installers, checking out, certification, and upkeep. Cabling professional John Vacca is going past LANs, reviewing key cable-related concerns linked to campus networks, WANs, the net and xDSL, in addition to modern more and more possible instant choices. you are going to additionally locate huge assurance of instruments and methods for documenting and handling cabling structures. The ebook includes targeted, up to date listings of most sensible cable installers, fiber optic cable brands, cable labeling proprietors, instant structures prone, and extra. even if you purchase, promote, or deal with cabling platforms, The Cabling guide, moment variation may help you maximize caliber and reduce disruption -- now, and for many years to return.
Read or Download Cabling Handbook, The (2nd Edition) PDF
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Extra resources for Cabling Handbook, The (2nd Edition)
Fiber allows a centralized cabling design with a single point of administration. By collecting all hubs, switches, routers, and gateways into one location, the network requires less active equipment, maintenance, and administration effort. This generates substantial savings in initial and recurring operating costs. For example, the simplicity and flexibility of centralized electronics facilitates rapid rearrangements of distributed workgroup networks, and avoids expensive protocol conversions and switching that are often deployed between traditional horizontal and backbone cabling.
FDDI, on the other hand, uses the medium interface connector (MIC), which is a duplex connector. It is physically larger then the SC connector, and the SC connector is gaining acceptance in the FDDI marketplace. < Free Open Study > < Free Open Study > Copper Versus Fiber Cable At this point in the chapter, it's appropriate to make a quick comparison of copper versus fiber media before going on to wireless media. There are two main reasons for the broad acceptance and rapid growth of Category 5 UTP as a horizontal media: low initial cost and the ability to deliver high-data-rate LAN services.
This is the type of system developed for strategic military communications systems, as it is very difficult to find and even more difficult to jam. Figure 1-15. Direct sequence spread spectrum. However, in an environment such as wireless LAN in the license-free, ISM band (where the available bandwidth critically limits the ratio of spreading), the advantages that the DSSS method provides against interference become greatly limited. A realistic example in use today is a 2 Mbps data signal that is spread across 20 MHz of spectrum and offering a spreading ratio of 10 times.