電子信息工程外文翻譯--綜合布線的未來適用于畢業(yè)論文外文翻譯中英文對照-文庫吧資料
2025-01-23 02:23本頁面
【正文】 ailable that will be economically feasible at bandwidths of 1G MHz? At what point does UTP bee less easy to use and less economical than other media?Future directionsAs far as we can see into the future, mercial information transfer will consist of both lowspeed and highspeed requirements. Applications such as voice, building automation systems, alarms, and security systems will still use low bandwidths. Voice information may change from central office exchange delivery to intelligent peripheral, but bandwidth requirements won39。s confusion. Bringing order to the confusion and creating generic cabling systems demanded the creation of a standards body whose output would focus on mercial buildings and munications cabling.Since the introduction of the first cabling standard in1991 by the Telemunications Industry Association/Electronic Industry Alliance (TIA/EIA), that same group has issued a series of standards and specifications regarding most aspects of the structured cabling systems. These standards have provided guidance related to evolving highspeed information transport systems. The vast majority of past and present digital munications, used in the mercial world, has been transported on unshielded twistedpair (UTP) cabling systems. UTP became the medium of choice because it was economical, perfectly adequate for the applications, and paratively easy to install versus other available media types.With advancements in network speeds, new transmission specifications for UTP cable and connecting hardware have been promoted by manufacturers and eventually endorsed by the standards munity. In 1991, the highest rated bandwidth over UTP was 16 MHz。w 畢業(yè)設(shè)計(jì)外文文獻(xiàn)及譯文文獻(xiàn)、資料題目:The future of structure cabling systems文獻(xiàn)、資料來源: Cabling Installation amp。 Maintenance Magazine 文獻(xiàn)、資料發(fā)表（出版）日期: 院（部）: 信息與電氣工程學(xué)院 專 業(yè): 電子信息工程 班 級: 姓 名: 學(xué) 號: 指導(dǎo)教師: 翻譯日期: w外文文獻(xiàn)： The future of structured cabling systemsWhich technologies will meet speed and datatransmission requirements in the future?To discuss the future of structured cabling systems, we should spend a moment looking at the past and present practices. Before early 1984, munications wiring systems, as they were then called, were not topics of much discussion. Datatransport speeds were paratively slow, transmission bandwidth requirements were minimal, and others provided the design and installation of the cabling system. The telephone panies took care of the installation and maintenance of the telephone service. When data services became distributed, the cabling system was vendorspecific, and the installation and maintenance of the cable plant was provided by the equipment vendors, or specialized independent contractors.In January 1984, the courts in the . made several important rulings that changed the way telemunications was provided and distributed. Outside of traditional suppliers of cabling systems, not much was understood about the cabling requirements for munications transport. The proliferation of media and connec
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