By B J Elliott
This ebook is a realistic layout guide for established cabling and explains the terminology and physics at the back of the appropriate criteria, what the acceptable criteria are, how they healthy jointly and the place to acquire them. Designing a based cabling approach to ISO 11801 second version is the 1st publication to offer a statement at the most up-to-date layout general for dependent cabling: ISO 11801: info know-how - frequent cabling for buyer premises, second version 2002 an individual utilizing this e-book could be capable of learn and comprehend this re-creation of the normal and all of the different proper criteria and relate their requisites to the brands' facts sheets and their, usually conflicting, claims. It presents transparent and powerful solutions to the issues raised via the necessity to layout, procure, set up and textual content a latest cabling method, utilizing either copper and optical fibre cable know-how. The booklet not just bargains a step by step advisor throughout the new common but in addition move references all different proper overseas, ecu and American criteria together with EN 50174 (Europe) and ANSI/TIA/EIA-568-B (USA). This e-book is meant as a source for IT managers, specialists, cable deploy engineers and process designers who have to comprehend the expertise of cabling structures and the large panoply of criteria that control them.
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Extra resources for Designing a Structured Cabling System to Iso 11801 Second Edition: Cross-referenced to European Cenelec and American Standards
Custom and practice still give an economic place for high pair-count backbone telephone (Category 3) cabling. This is not specified in ISO 11801 2nd edition but can still be specified for a cabling system by invoking ISO 11801 1st edition and/or IEC 61156. 2 Copper cable constructions The cable construction allowed is twisted pairs or quads. e. as in ‘four-pairs’. Twisted pairs are by far the most common construction and are ideal for the balanced cable transmission technique used by modern LANs.
Topology or architecture of structured cabling systems 17 CD Campus distributor BD BD Building distributors Campus backbone cabling Building backbone cabling FD FD FD Floor distributors Horizontal cabling TO TO TO TO Telecommunications outlets Fig. 5 Three-layer hierarchical model. In a smaller installation there might be no more than horizontal cabling; there is no requirement to use all three levels of patching available. Single building sites will probably only have the horizontal cabling and the building backbone cabling.
Cable constructions. For the rest of this book we will presume that all copper cable constructions are based on four twisted pairs unless stated otherwise. Copper cables can be either screened or unscreened. Screening, often referred to as shielding in American documents, means putting layers of metallic elements around the conductors to keep electrical interference out of the cable and to stop any electromagnetic signals leaving the cable. Screening the cable costs more and it makes the cables larger and more difficult to terminate.