标题: 布线的未来（英文资料） [打印本页] 作者: davidxiang 时间: 2003-6-14 23:47 标题: 布线的未来（英文资料） For 10 Mbs working, copper category 3 cabling is quite adequate.
For 100 Mbs working, copper category 5 cabling is required.
For 1 Gbs working, copper category 5e cabling is required. （尽管六类系统强于超五类系统，但同样都是为支持 1 Gbs 应用而产生的）
For 10 Gbs working, extended working 50/125µm fibre optic cabling is required
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If, as trends suggest, we may expect 10 Gbs operation within the lifetime of the wiring and in view of the fact that horizontal wiring is expensive to alter, we should try to make any current installation as so called "future proof" as we can. As the solution offered by improved copper cabling is likely to be transient and is likely to be just as expensive as fibre, we need to consider the provision of fibre for all new work. If, because of current cost, fibre is not actually installed in any given project, at the very least, space provision in the cable containment ought to be made in order to accommodate its future adoption. One way of achieving this without laying any actual fibre is to make use of "blown fibre" conduits. This is a technique whereby conduits for fibres are installed alongside traditional wiring. They may subsequently be brought into operation by using compressed air to blow fibres down the pre-installed conduits to their destination. This has the following advantages: