12
Table 3-1 Pin description
DB9 pin
RJ–45 pin
Signal
Description
2
3
RXD
Receiving data
3
2
TXD
Sending data
5
5
GND
GND
3.2.3 SFP Port
Background Information
The signal is transmitted through laser by optical fiber cable. The laser conforms to the requirement
of level 1 laser products. To avoid injury of eyes, do not look at the 1000 Base-X optical port directly
when the device is powered on.
Before installing SFP module, wear antistatic gloves, and then wear antistatic wrist strap. Make sure
that the antistatic gloves and the antistatic wrist strap are in good contact.
Figure 3-6 SFP module structure
Figure 3-7 SFP module installation
Procedure
Step 1
Lift the handle of SFP module upward vertically, and then stuck it to the top hook.
Step 2
Hold the SFP module by both sides, and push it gently into the SFP slot till the SFP module
is firmly connected to the slot.
Both the top and bottom spring strip of the SFP module are firmly stuck with the SFP slot.
3.2.4 GND
Normal GND of the device is the important guarantee for device lightning protection and
anti-interference. You should connect the GND cable before powering on the device, and power off
the device before disconnecting the GND cable.
