3com 8814 Manual De Usuario

connected to the switch should be inserted into the arrester’s OUT end). When 
you do that, observe whether the arrester indicators normally display.

n 

Step 5: Use the nylon ties to bundle the cables neatly.

Fully consider the following items in the installation process, otherwise, the 
performance of the lightning arrester for network port will be affected:

■

Lightning arrester for network port is installed in reverse direction. In practice, 
the “IN” end should be connected to the outdoor network cable and the 
“OUT” end to the network port on the switch.

■

Lightning arrester for the network port is not well grounded. The ground wire 
for the arrester should be as short as possible, so to ensure its good contact 
with the grounding screw of the switch. After the connection, use the 
multimeter to confirm that.

■

The lightning arrester for the network port is not installed completely. If the 
switch has more than one network ports to interconnect with other devices via 
cables outdoor, you should install lightning arresters for all these network ports 
for protection.

Switch

Network cable indoors

Power input

Network cable led into from outdoor

Lightning arrester for network port

(attached onto the chassis)

Ground wire of lightning arrester 

Grounding screw of switch

Metal cabinet that contains the