For a straight cable - like from
a HUB to a PC, the wires match
one for one. To connect two hubs
- use a crossover cable.
To Direct Connect two PC's
directly to each other use a
cross over cable. For the chart
beside use the same pin outs on
both ends for a straight through
cable and different pin outs on
each end for a cross over
cable.
 |
Cable Wiring Pin Outs
|
Pin |
Color Code for Straight
Cable
|
Color Code for Cross
Over Cable
|
|
1 |
White/Green |
White/Orange
|
|
2 |
Green |
Orange |
|
3 |
White/Orange |
White/Green |
|
4 |
Blue
(voice) |
Blue |
|
5 |
White/Blue (voice) |
White/Blue |
|
6 |
Orange |
Green |
|
7 |
White/Brown
(POE) |
White/Brown |
|
8 |
Brown
(POE) |
Brown |
|
|
|
TIA
568B
connector to the left is an RJ
45 type. The photo is taken
looking at the bottom where the
pins are exposed. Note the color
coding of the wires from the top
down. |
|
As you can see from the
10/100Base-T RJ 45 chart only 4
wires (2 pair) or pins (1, 2, 3
& 6) are being used. Because
there are 8 conductors in a
cable it is entirely possible
and more economical to run two
computers on the same cable as
long as the wall data jacks are
side by side.
|
|
|
For residential telephone wiring
the jack to the right only 2
pins or 1 blue pair is being
used. Notice that the colour of
pairs is different than the
above RJ 45 and that the used
pins are also different. Also
notice how the colours match
with the chart
Telephone
Rollover Cable
You can
identify a telephone rollover
cable by comparing the two
connectors at each end of the
cable. Hold the cable ends
side-by-side,
looking at the bottom where the
pins are exposed
The wire connected to the pin on
the outside of the left
connector should be the same
color as the wire connected to
the pin on the outside of the
right connector. Telephone
rollover cables are not 10Base-T
cross over cables. Refer to the
above chart for 10/100 Base-T
Cross over Cables. |
|
