RJ-45 Pin Specifications
Individual wires that make up a straight through twisted pair modular
cable are shown below. Each pair has designated pin connections on an
RJ-45 modular connector. There are only two active pairs in a 10BaseT
network, pins 1 & 2 and 3 & 6. Use only dedicated wire pairs (such as
blue-white/white-blue, orange-white/white-orange).
Hub
to
Terminal
RJ-45 (male)
RJ-45 (male)
1
(RX+)
(TX+)
1
2
(RX-)
(TX-)
2
3
(TX+)
(RX+)
3
6
(TX-)
(RX-)
6
The following is the pinout for a crossover cable. A 10BaseT (RJ45)
crossover cable is used to connect any two like devices, such as hub-to-
hub or terminal-to-terminal.
Hub
to
Hub
Terminal
to
Terminal
RJ-45 (male)
RJ-45 (male)
1
(TX+)
(RX+)
3
2
(TX-)
(RX-)
6
3
(RX+)
(TX+)
1
6
(RX-)
(TX-)
2
3.6.3
Connecting to 10BaseFL
The StackMaster™ connects to 10BaseFL Ethernet through fiber optic
connectors at the front of the StackMaster™ Unit.
Fiber connections are always transmit to receive.
3. INSTALLATION
3-15
MANAGEABLE HUB