Function Pin# Pin#
-------------------------------------
TX+ 1 1
TX- 2 2
RX+ 3 3
RX- 6 6
-------------------------------------
STRAIGHT THOUGH CABLE
To allow for a straight-through cable, the hub provides an internal
transmit/receive crossover function. This means the transmit circuit of the
network adapter is connected to the receive circuit of the hub and vice versa.
Pinout for the RJ45 Connector
PINOUT FOR RJ45 CABLE CONNECTOR:
--------------------------------
---------- --------------------------
1 |-- | 8 |------------ |
2 |-- | 7 |------------ |
3 |-- --- 6 |------------ |
4 |-- | 5 |------------ |
5 |-- | 4 |------------ |
6 |-- --- 3 |------------ |
7 |-- | 2 |------------ |
8 |-- | 1 |------------ |
---------- --------------------------
END TOP
For test purposes, you can directly connect two workstations or a workstation
and a server without using a hub. This requires a special cable that
incorporates the crossover function talked about at the beginning of this
document.
Function Pin# Pin# Function
--------------------------------------------------
TX+ 1 3 RX+
TX- 2 6 RX-
RX+ 3 1 TX+
RX- 6 2 TX-
--------------------------------------------------
CROSSOVER CABLE
Pinout an suggested wire colors
---------------------------------------------------------
1 |--| 8 |brown---------------|\
2 |--| 7 |--white/brown-------| \
3 |------| 6 |green---------------| \
4 |-- | 5 |blue----------------| -
5 |-- | 4 |--white/blue--------| _Cable
6 |------| 3 |--white/green-------| /
7 |--| 2 |orange--------------| /
8 |--| 1 |--white/orange------|/
------------
Viewed from end