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King Pigeon Hi-Tech. Co., Ltd.
Ver 1.0
Industrial Ethernet Switch
RJ45 ports support auto MDI/MDI-X, it can be connected with PCs,servers other switches or hubs by MDI. When
use MDI connection,relative pin 1, 2, 3, 6 to be connected directly. For MDI-X port of switch or hub, it adopts cross
connection: 1->3, 2->6, 3->1, 6->2. 10/100Base-T(X)MDI/MDI-X pin assignment is as below:
Pin No.
MDI Signal
MDI-X Signal
1
TX+
RX+
2
TX-
RX-
3
RX+
TX+
6
RX-
TX-
4,5,7,8
-
-
Remarks: "TX " is "data transmit", "RX " is "data receive", "-" is empty.
4.2 100/1000Base-X Fibre Optical Port
N80/N81 Ethernet switch provides 100/1000Base-(F)X fiber optical ports; when using RJ45 ports, it can be
connected with other Ethernet terminal devices through fiber port by fiber patch cord.
4.2.1 Fiber patch cord
According to the transmission mode of light on fiber, there are multi-mode fiber and single-mode fiber. The
central glass core of multi-mode fiber is thick (50 or 62.5 m); it can transmit light in different mode. The chromatic
dispersion is big, and this causes limitation on frequency of transmission digital signal. With this, the transmission
distance of multi-mode fiber is short (mostly few kms). The central glass core of single-mode is thin (9 or 10 m),
and it can transmit single mode light. The chromatic dispersion is small, it is good for long distance communication.
Normally, the orange cable is multi-mode; the yellow cable is single-mode.
4.2.2 Fiber optical port
Fiber optical port is a physical interface for fiber cable connection. It adopts the principle that when light enter
optically thinner medium from optically denser medium, the light will total reflection. There are four types fiber
port:
FC port:
FC port is a round port with thread, metal style; it adopts metal cover outside, use thread and nut to
match and fix.
SC port:
SC port is a standard square style port; it adopts engineer plastics,high temperature resistance, hard to
oxidate.
LC port:
LC port is similar to SC port, but smaller than SC port; it adopts modular jack, easy to operate.
ST port:
ST port is a clip-on round port.
Ethernet Cable
