Moxa Technologies CSM 200 manual 100BaseFX Fiber Port Connection

RJ45 (8-pin) to RJ45 (8-pin) Straight-Through Cable Wiring

Switch Port

RJ45 Connector

Tx+

Tx-

Rx+

Rx-

	Straight-Through Cable
	RJ45 Plug Pin 1
	Cable Wiring
3		3
6		6
1		1
2		2

NIC Port

RJ45 Connector

Rx+

Rx-

Tx+

Tx-

RJ45 (8-pin) to RJ45 (8-pin) Cross-Over Cable Wiring

Switch Port (NIC Port)

RJ45 Connector

(Rx+) Tx+

(Rx-) Tx-

(Tx+) Rx+

(Tx-) Rx-

	Cross-Over Cable
	RJ45 Plug Pin 1
	Cable Wiring
3		1
6			2
1			3
2			6

Switch Port (NIC Port)

RJ45 Connector

Rx+ (Tx+)

Rx- (Tx-)

Tx+ (Rx+)

Tx- (Rx-)

100BaseFX Fiber Port Connection

The concept behind the SC port and cable is quite straightforward. Suppose you are connecting devices I and II. Contrary 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 below, or A1-to-A2 and B1-to-B2).

SC-Port Pinouts SC-Port to SC-Port Cable Wiring

Tx

Rx

A	A
B	B
	Cable Wiring
A	A
B	B

ST-Port Pinouts	ST-Port to ST-Port Cable Wiring
	A	A
Tx	B	B
		Cable Wiring
Rx	A	A
	B	B
		- 5 -