Installation guide

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RJ45 (8-pin) to RJ45 (8-pin) Cross-over Cable Wiring
Cross-Over Cable
RJ45 Plug Pin 1
Switch Port
(NIC Port)
RJ45
Connector
RJ45
Connector
Tx+
Tx-
Rx+
Rx-
(Rx+)
(Rx-)
(Tx+)
(Tx-)
(Tx+)
(Tx-)
(Rx+)
(Rx-)
Switch Port
(NIC Port)
Cable Wiring
3 1
6 2
1 3
2 6
Rx+
Rx-
Tx+
Tx-
100BaseFx Ethernet Port Connection
The concept behind the SC/ST port and cable is quite straightforward.
Suppose you are connecting devices I and II. As opposed to electrical signals,
optical signals do not require a circuit in order to transmit data. Consequently,
one of the optical lines is used to transmit data from device I to device II, and
the other optical line is used transmit data from device II to device I, for
full-duplex transmission.
All you need to remember is to connect the Tx (transmit) port of device I to
the Rx (receive) port of device II, and the Rx (receive) port of device I to the
Tx (transmit) port of device II. If you are making your own cable, we suggest
labeling the two sides of the same line with the same letter (A-to-A and
B-to-B, as shown by the following illustration, or A1-to-A2 and B1-to-B2).
SC-Port Pinouts SC-Port to SC-Port Cable Wiring
Tx
Rx
AA
BB
Cable Wiring
A A
B B
ST-Port Pinouts ST-Port to ST-Port Cable Wiring
Tx
Rx
AA
B
Cable Wiring
A A
B B
B
ATTENTION
This is a Class 1 Laser/LED product. To prevent damage to your
eyes, do not stare directly into the laser beam.