Tham khảo tài liệu 'adc krone - cat 6a copperten - making the impossible posible', công nghệ thông tin, quản trị mạng phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | CopperTen™ Cabling Solution Making the Impossible Possible For years, copper UTP solutions have been the preferred medium over which most Local Area Networks communicate. And in this same period, a debate has raged as to when fiber would displace copper as the preferred infrastruc- ture. Several years ago Gigabit Ethernet seemed like a pipe dream, yet today Gigabit Switch port sales have overtaken 10/100BaseT of old. Fiber has for years lead the Ethernet industry forward in port speed progres- sion. So why, if fiber is one step ahead, doesn’t it replace copper? The answer is quite simple. To convert Electrons to Photons and then back to Electrons adds cost (from an active hardware prospective)! This makes the cost of fiber optic active hardware as much as six times more expensive per port today than the equivalent speed copper UTP solution on gigabit Ethernet switch ports. With Ethernet now the winner of the horizontal desktop LAN protocol war, a pattern has arisen with regards to transportation speed. Migration from 10BaseT to 100BaseT and now Gigabit Ethernet (1000BaseT), the transporta- tion speed has always progressed tenfold. Where we are today, with regards to protocol advancement, is no different. Ten Gigabit Ethernet is alive and breathing today in the form of fiber optics. The year 2003, particularly the last quarter, was pivotal in the old question of “when will copper reach its limit”? By the title of this paper you might sur- mise, yet once again, someone has figured out a way to produce a copper networking solution to support 10Gig. The cabling industry (Telecommunication Industry Association (TIA)/Electronic Industries Alliance (EIA)) doesn’t drive the electrical parameters needed to run transmission protocols. It is the IEEE who develops proposed protocols, under- stands what is needed from an electrical standpoint and then gives the TIA responsibility of developing measurable parameters for cable (with the possible exception of Category 6 – See “The
