H3C S12500 Installation Manual page 151

Installation precautions
The performance of the port lightning arrester may be affected in the following cases:
• The port lightning arrester is installed in reverse direction. Connect the IN end to the outdoor
network cable and the OUT end to the network port on the switch.
The port lightning arrester is not well grounded. After the connection, use the multimeter to confirm
•
that the ground wire for the arrester is as short as possible to ensure its good contact with the
grounding screw of the switch.
The installed port lighting arresters are not sufficient. If the switch has more than one network port
•
connected with other devices through cables outdoor, install a lightning arrester for each network
port.
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