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Learning by Doing: CISCO Certified Network ... - SCN Research

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EIA/TIA 568A<br />

EIA/TIA568B<br />

White/green 2 White/orange<br />

3 Green Orange<br />

White/Orange<br />

White/green<br />

2 1 Blue 3 1 Blue<br />

White/Blue<br />

White/Blue<br />

Orange<br />

Green<br />

4 White/Brown 4 White/Brown<br />

Brown<br />

Brown<br />

Figure 3—EIA/TIA 568A and B wiring patterns.<br />

Straight Through (ST): Used for connecting dis-similar devices (workstations to hubs,<br />

switches to routers, hubs to switches, etc.). The cables are wired with the same wiring<br />

pattern on each end.<br />

EIA/TIA<br />

568A<br />

ST<br />

EIA/TIA<br />

568A<br />

EIA/TIA<br />

568B<br />

ST<br />

EIA/TIA<br />

568B<br />

Crossover (xo): Used for connecting similar devices (workstations to workstations,<br />

switches to switches, hubs to hubs, etc). The cables are wired with pairs 2 and 3<br />

“crossing over” from one end to the other (see also figure 3).<br />

EIA/TIA<br />

568A<br />

xo<br />

EIA/TIA<br />

568B<br />

EIA/TIA<br />

568B<br />

xo<br />

EIA/TIA<br />

568A<br />

35

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