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EQP = application-specific equipment; TO = telecommunications outlet (under certain conditions two terminals may share one outlet). As the principles guiding ISO/IEC 11801 also apply to CCCB and HE cabling, all kinds of information will eventually use a common cabling infrastructure. International and European standards for CCCB cabling as well as for a combination of CCCB, ICT, and HE cabling for small offices and home offices (SOHO) are already being developed. This article gives a preview of this future multipurpose cabling and outlines principles of a generic cabling system for all kinds of information.
Figure 8 shows the improvement in attenuation, NEXT, and ACR from one cable category to the next. There are many different ways to implement balanced cables. Many abbreviations are used to identify them. Abbreviations such as UTP, STP, FTP, S/UTP, and S/FTP hide more than they tell. A cable is characterized by its electrical and mechanical characteristics and not by three or four letters, especially since these letters have a second meaning: in the United States one often uses UTP to characterize cables with an impedance of 100 , while STP means 150 .
To use copper cables at these places, heavy shields are needed. BUILDING WIRING 23 Modern technology provides the means to convey digital information with bit rates up to 1 Mbit/s over a few hundred meters via power lines. With the deregulation of the telephone business, all the entities that have pathways or access lines to the end user, such as telephone companies and suppliers of power, cable TV, gas, water, and distributed heating, are eager to harvest an additional crop from their access. Thus technicians are challenged to create an added value on these lines.