23
The router supports the following types of surge protectors:
•
Surge
protector
—Maximum discharge current 2.5KA/protection voltage 25V--SMB-75J/
SMB-75J-1W-10Mbps
•
Surge
protector
—Maximum discharge current 2.5KA/protection voltage 25V-BNC-75K/
BNC-75K-10Mbps
•
Surge protector (U port)
—Maximum discharge current 3KA/common-mode 400V/differential
mode 170V-RJ11
To install a surge protector:
1.
Use a double-faced adhesive tape to stick the surge protector onto the router chassis, and
make sure it is as close to the grounding screw of the router as possible.
2.
Measure the distance between the protector and the grounding screw of the router, cut the
ground wire of the protector as appropriate, and securely tighten the ground wire to the
grounding screw of the router.
3.
Use the multimeter to measure whether the ground wire of the protector contacts well with the
grounding screw of chassis.
4.
Insert the outdoor network cable into the protector's IN end, and the cable connected to the
router into the OUT end, and look at the indicators on the surge protector to verify that the
connection is correct.
5.
Use nylon ties to bundle the cables neatly.
Figure 24 Installing a surge protector
(1) Grounding cable
(2) Surge protector
The performance of the surge protector might be affected in the following cases:
•
The surge protector is installed in reverse direction. Connect the IN end to the outdoor network
cable and the OUT end to the network port on the router.
•
The surge protector is not reliably grounded. After the connection, use the multimeter to confirm
that the ground wire for the protector is as short as possible to ensure its good contact with the
grounding screw of the router.