3com 8807 User Manual

Figure 65   Installation diagram of a network port’s lightning arrester

To ensure that the network port’s lightning arrester does not affect performance, 
make sure that the lightning arrester for network port is:

■

Connected properly (see Step 4 in the previous section).

■

Well grounded. The ground wire for the arrester should be as short as possible. 
Ensure that it is has proper contact with the switch’s grounding screw using the 
multimeter.

■

Installed completely. If the switch has more than one network ports to 
interconnect with other devices using outdoor cables, you should install 
lightning arresters for all network ports for protection.

Switch 

Network cable indoors 

Power input 

Network cable from outdoors

Lightning arrester for the network port
(attached onto the chassis) 

Lightning arrester ground wire 

Switch grounding screw

Metal cabinet that contains the switch