Short for Category 5, network cabling that consists of four twisted pairs
of copper wire terminated by RJ45 connectors. Cat-5
cabling supports frequencies up to 100 MHz and speeds up to 1000 Mbps. It
can be used for ATM, token ring, 1000Base-T, 100Base-T, and 10Base-T networking.
Computers hooked up to LAN s are connected using Cat-5 cables, so if you're
on a LAN, most likely the cable running out of the back of your PC is Category
5.
Cat-5 is based on the EIA/TIA 568 Commercial Building Telecommunications
Wiring Standard developed by the Electronics Industries Association as requested
by the Computer Communications Industry Association in 1985.
568-B Wiring
(RJ-45) |
. |
568-A Wiring
(RJ-45) |
<RJ-45 Pins 1-8 Facing Up> |
1 |
2 |
|
3 |
|
4 |
5 |
|
6 |
|
7 |
8 |
. |
. |
|
. |
|
. |
. |
|
. |
|
. |
. |
. |
|
. |
|
. |
|
|
. |
. |
|
. |
|
. |
|
|
. |
. |
|
. |
|
. |
|
|
. |
. |
|
. |
|
. |
|
|
. |
Orange pair 2 |
|
. |
|
Blue pair 1 |
|
|
Brown pair 4 |
|
|
|
<Green Pair 3> |
|
|
|
|
Pair
# |
Wire |
Pin
# |
1 - White/Blue |
White/Blue |
5 |
Blue/White |
4 |
2 - White/Orange |
White/Orange |
1 |
Orange
White |
2 |
3 - White/Green |
White/Green |
3 |
Green/White |
6 |
4 - White/Brown |
White/Brown |
7 |
Brown/White |
8 |
568 B Diagram |
|
<RJ-45 Pins 1-8 Facing Up> |
1 |
2 |
|
3 |
|
4 |
5 |
|
6 |
|
7 |
8 |
. |
. |
|
. |
|
. |
. |
|
. |
|
. |
. |
. |
|
. |
|
. |
|
|
. |
. |
|
. |
|
. |
|
|
. |
. |
|
. |
|
. |
|
|
. |
. |
|
. |
|
. |
|
|
. |
Green pair 2 |
|
. |
|
Blue pair 1 |
|
|
Brown pair 4 |
|
|
|
<Orange Pair 3> |
|
|
|
|
Pair
# |
Wire |
Pin # |
1 - White/Blue |
White/Blue |
5 |
Blue/White |
4 |
2 - White/Green |
White/Green |
1 |
Green/White |
2 |
3 - White/Orange |
White/Orange |
3 |
Orange/White |
6 |
4 - White/Brown |
White/Brown |
7 |
Brown/White |
8 |
568 A Diagram |
|
|
Notes for wiring diagrams above:
1. For patch cables, 568-B wiring is by far,
the most common method.
2. There is no
difference in connectivity between 568B and 568A cables. Either
wiring should work fine on any system*. (*see notes
below)
3. For a straight through cable, wire both ends
identical.
4. For a
crossover cable, wire one end 568A and the
other end 568B.
5. Do not confuse pair numbers with
pin numbers. A pair number is used for reference only (eg: 10BaseT
Ethernet uses pairs 2 & 3). The pin numbers indicate actual physical
locations on the plug and jack.
See Also:
file: /Techref/cat5.htm, 24KB, , updated: 2018/3/16 08:14, local time: 2024/12/25 10:30,
|
| ©2024 These pages are served without commercial sponsorship. (No popup ads, etc...).Bandwidth abuse increases hosting cost forcing sponsorship or shutdown. This server aggressively defends against automated copying for any reason including offline viewing, duplication, etc... Please respect this requirement and DO NOT RIP THIS SITE. Questions? <A HREF="http://linistepper.com/Techref/cat5.htm"> cat 5 cables</A> |
Did you find what you needed?
|