29
4.2 10BASE-T Pin Assignments
An Ethernet twisted pair link segment calls for two
pairs of wires, with each pair differentiated by color.
Each twisted pair link segment must have an RJ-45
male connector attached to both ends. Pins 1 and 2 on
the RJ-45 connector are for transmitting data while
pins 3 and 6 are for receiving data. See chart below:
RJ-45 Assignment*
RJ-45 Assignment*
1
Tx+
1
Rx+
2
Tx-
2
Rx-
3
Rx+
3
Tx+
6
Rx-
6
Tx-
* The “+” and “-” signs are used to represent the
polarity of the two wires that make up each wire pair.
NOTE: Each wire pair must be connected to the RJ-45
connectors in a specific orientation. Refer to 4.3 Crossover
Function for details.
This is standard
for Ethernet
devices. Port 24
has the Tx and
Rx crossed.
This is the
signal on
the
BOCAHUB-
24 Plus.
Cabling Characteristics
