们的基本特性,和使用这三种介质时的注意事项和技巧。其中重点介绍了目前
主流的双绞线压制水晶头的技巧。你可能不需要亲自压制一个水晶头,但是一
定要有能力判断一个水晶头的好好坏。
1 概述.......................................................................................................................................................2
2 铜介质..................................................................................................................................................2
2.1 同轴线...........................................................................................................................................2
2.1.1 10Base5.................................................................................................................................3
2.1.2 10Base2................................................................................................................................4
2.1.3 Cable Modem....................................................................................................................4
2.2 双绞线..........................................................................................................................................4
2.2.1 10Base-T..............................................................................................................................6
2.2.2 100Base-TX.........................................................................................................................6
2.2.3 1000Base-TX.......................................................................................................................6
2.2.4 10GBase-TX........................................................................................................................7
2.2.5 帮我做根线..........................................................................................................................7
2.2.6 各种线缆..............................................................................................................................7
2.2.7 水晶头..................................................................................................................................9
2.2.8 线序标准.............................................................................................................................11
2.2.9 直连线................................................................................................................................12
2.2.10 交叉线...............................................................................................................................13
2.2.11 反转线...............................................................................................................................13
2.2.12 UTP Cat-5e 双绞线制作技巧........................................................................................14
2.2.12.1 剪掉外套的长度.......................................................................................................14
2.2.12.2 排线序......................................................................................................................15
2.2.12.3 剪线长度..................................................................................................................15
2.2.12.4 插入到水晶头..........................................................................................................15
2.2.12.5 压线...........................................................................................................................15
2.2.13 Cat-6 与 STP....................................................................................................................15
2.2.14 10 项测试..........................................................................................................................16
2.2.15 常见接线图错误..............................................................................................................17
2.2.16 常见错误汇总..................................................................................................................22
3 光介质................................................................................................................................................22
3.1 光纤结构....................................................................................................................................23
3.2 单模与多模...............................................................................................................................24
3.3 光纤连接器...............................................................................................................................25