|
||||
| Connectivity Troubleshooting Guide for Windows Users | ||||
 |
| 39. | You must use a straight-through cable to connect your computer to the Ethernet. Verify your Cat 5 Ethernet cable is a “straight-through” cable and not a “cross-over” cable. You can use figures 39a, 39b, and 39c to help you identify the type of Ethernet cable you have. Note there are 4 pairs of 8 wires. These are separated into four color groups: orange, green, blue and brown. Each color group contains two wires: one white with a colored stripe and the other a solid color—e.g. orange-white/orange, green-white/green, etc. The order of the colors in the connectors can be used to determine if you are using a straight-through or a cross-over cable. Hold
the end of the cable in your hand with the clip down (or to the back)
and the end of the connector pointing up (or away from you) as shown
in figures 39a and 39b. (The “gold” pins in the connector
are visible at the top of the connector. The dashed lines represent
the striped wires in their color groups.) There are two wiring color-code
standards for Ethernet cabling: EIA/TIA 568A and EIA/TIA 568B. A
568A cable will start with the green-white wire at pin 1. 568B starts
with orange-white at pin 1. Regardless of whether the cable is using
the 568A or 568B wiring standard, a straight-through cable will have
the same color order on both ends. A cross-over cable, however, will
be wired using 568A at one end and 568B at the other. This means
the connector at one end will start with the green-white wire and
the connector at the other end will start with orange-white. If the
cable ends depicted in figures 39a and 39b were representative of
opposing ends of a single cable, the cable would be a cross-over
as the color order of the wires is different at each end.
Is the cable you are using a straight-through cable? |
 |
 |
Yes, both ends of the cable are
in the same color order. Go to 40. |
|||||
 |
No.
You must obtain and use a proper Cat 5 "straight-through" Ethernet
cable. |
|||||
Telecommunications & Networking
Dept. Created: June 1, 2002 Last revised: November 27, 2003 Contact: resnet-webmaster@sfasu.edu |
||||||