     ǽ΢նˣ໥ѭһЭ飬ϢʵԴ߳õУ˫ߡͬ¡˵ȡ˫߿ɰǷӽ˿׵βΪ˫ߣSTPͷ˫ߣUTPԼ۱ȺͿάԳʹ÷˫ߣUTP-Unshielded Twisted ....pair ΪߵĴ  
 UTPһȵ˫ߺRJ45ˮͷɡ˫8ܲͬɫ߷ֳ4Խʺһ𣬳ɶŤʵǾܼٵŷⲿŸŵӰ졣EIA/TIA-568׼У˫߰ΪࡢࡢߡõߺߣĿǰϵġ 
 õҪRJ45ˮͷHUB豸RJ45ڡӦRJ45ͷҲΪԡRJ45ˮͷɽƬϹɣҪRJ45ˮͷǰ8ɮơSEPositionλã 
 ڵĽ㹲8ơ8C Contact㣩ҵԴС8P8C ıơرҪעRJ45ˮͷţƬǵʱ 1~8Ŷ߷ƳҪܸ  
 ˫ߵΪ 100mҪӴ룬˫֮ɰװмɰװ4м簲װ4м5Σɴ500m 
 EIA/TIAĲ߱׼й涨˫ߵ568A 568B 
 ׼568A 
̰--1--2Ȱ--3--4--5--6ذ--7--8 
 ׼568B 
Ȱ--1--2̰--3--4--5--6ذ--7--8 
 Ϊ˱ѵļԣձEIA/TIA 568B׼ߡ粼 Ӧһֲ߷ʽ˶RJ45ڵǲ568A׼568B׼жǿеġ˫ߵ˳RJ45ͷšһӦ 10M ̫ʹ1236ŵоߴݣ100MҪʹĶߡ10Mܹʹð100Mʽߣ˫ṩĶߣʹʹ10MһҲ100Mʽߡ 
 ׼Ҫ12364578߱˫ʡΪݵĴУΪ˼ٺĸţͺͽյݾԲַʽ䣬ÿһ߻Ťһһ·źţҲ˫Ƶ 
 νĲźָһƽʽźţһԸƽʽͬһźţ·гָźʱߵӰͬģڽն˻ԭźʱͿεøźţΪֵ·źִм㣩˫ƸŵԭԿÿ߽˫ʵĿΪƸźţߴ˫ߵĽͷʱһҪźŵһ߷ֿ򽫴ӰĴ