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商业布线系统的标准制定计划可以追溯到80年代中期,在此之前主要是由关键厂商对布线系统的分类起主导地位。让我们回顾一下有关的标准。EIA/TIA-568 直到1991年7月,由美国电子工业协会/电信工业协会发布了ANSI/EIA/TIA-568,即“商务大厦电信布线标准”,正式定义了综合布线系统的线缆与相关组成部件的物理和电气指标。该标准规定了100ohm UTP(非屏蔽双绞线)、150ohmSTP(屏蔽双绞线)、50ohm 同轴线缆和62.5/125光纤的参数指标。
Standard planning for commercial cabling systems dates back to the mid-1980s, before predominantly the classification of cabling systems by key vendors. Let us review the relevant standards. EIA / TIA-568 Until July 1991, ANSI / EIA / TIA-568, the “Telecommunication Cabling Standard for Commercial Buildings,” was released by the American Electronics Industry Association / Telecommunications Industry Association to formally define the cabling and related aspects of integrated cabling systems Physical and electrical components of the component. The standard specifies parameters for 100ohm UTP (unshielded twisted pair), 150ohmSTP (shielded twisted pair), 50ohm coaxial cable and 62.5 / 125 fiber.