12.0 Ethernet 10Base-T Cabling
Description
This article is from the Data Communications Cabling FAQ, by Peter Macaulay pmac@fox.nstn.ca with numerous contributions by others.
12.0 Ethernet 10Base-T Cabling
12.1 Ethernet 10Base-T Straight Thru patch cord (T568B colors);
RJ45 Plug RJ45 Plug
========= =========
/--T2 1 ... White/Orange .... 1 TxData +
pair2 \--R2 2 ... Orange .......... 2 TxData -
/----------T3 3 ... White/Green ..... 3 RecvData +
/ R1 4 Blue 4
\ pair3 T1 5 White/Blue 5
\----------R3 6 ... Green ........... 6 RecvData -
T4 7 White/Brown 7
R4 8 Brown 8
12.2 Ethernet 10Base-T Crossover patch cord;
This cable can be used to cascade hubs, or for connecting
two Ethernet stations back-to-back without a hub (ideal for
two station Doom!) Note pin numbering in item 10.0 above.
RJ45 Plug 1 Tx+ -------------- Rx+ 3 RJ45 Plug
2 Tx- -------------- Rx- 6
3 Rx+ -------------- Tx+ 1
6 Rx- -------------- Tx- 2
12.3 Ethernet 10Base-T to USOC Crossover patch cord;
RJ45 8-pin Plug 1 ---White/Orange--- 2 USOC 6-pin Plug
^ 2 ------Orange------ 5 ^
3 ---White/Green---- 1
6 ------Green------- 6
12.4 Crossover Implementation
A simple way to make a crossover patch cable is to take a
dual-jack surface mount box and make the crossover between
the two jacks. This allows using standard patch cables, and
avoids the nuisance of having a crossover cable find its way
into use in place of a regular patch cable.
12.5 Stranded Patch Cables
The color code used in stranded patch cables is different from
solid-conductor cables. For NorTel Digital Patch Cable (DPC),
the coding is;
Pair 1: Green & Red
Pair 2: Yellow & Black
Pair 3: Blue & Orange
Pair 4: Brown & Gray
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