By David Groth, David McBee, Jim McBee, David Barnett
--This is the main entire ebook offering cable installers, contractors, community directors, and computing device and community technicians all of the details they should understand to paintings effectively and successfully with cables within the place of work.
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Additional info for Cabling The Complete Guide to Network Wiring
Fiber Optics Comes of Age (Affordably) Fiber-optic cable used to be much harder to install than copper cable, requiring precise installation practices. However, in the past few years, the cost of an installed fiber-optic link has dropped and is now often only 10 to 15 percent more than the cost of a UTP link. Better fiber-optic connectors and installation techniques have made fiber-optic systems easier to install. In fact, installers experienced with both fiber-optic systems and copper systems will tell you that with the newest fiber-optic connectors and installation techniques, fiber-optic cable is easier to install than UTP.
In the IBM design, the wire used in STP cable is 22 AWG (just a little larger than the 24 AWG wire used by typical UTP LAN cables) and has a nominal impedance of 150 ohms. 2: Overall shield STP cable Cable jacket Individual pair Pair shield Constructions of STP in 24 AWG, identical in copper conductor size to UTP cables, are more commonly used today. Simply installing STP cabling does not guarantee you will improve a cable’s immunity to EMI or reduce the emissions from the cable. Several critical conditions must be met to achieve good shield performance: • The shield must be electrically continuous along the whole link.
Unfortunately, the legacy of early cabling still lingers in many places. PC LANs came on the scene in the mid-1980s; these systems usually consisted of thicknet cable, thinnet cable, or some combination of the two. These cabling systems were also limited to only certain types of hosts and network nodes. As PC LANs became popular, some companies demonstrated the very extremes of data cabling. Looking back, it’s surprising to think that the ceilings, walls, and floor trenches could hold all the cable necessary to provide connectivity to each system.
Cabling The Complete Guide to Network Wiring by David Groth, David McBee, Jim McBee, David Barnett