Figure 4-6 Connect the grounding terminal of the PGND cable to the router
(1) Grounding sign (2) Grounding screw hole
(3) PGND cable (4) OT terminal
(5) Grounding screw (6) Rear chassis panel
Follow these steps to connect the PGND cable:
Step1 Remove the grounding screw from the rear chassis panel.
Step2 Put the supplied OT terminal of the PGND cable on the grounding screw.
Step3 Fasten the grounding screw, which is attached with the OT terminal of the PGND cable, into the
grounding screw hole with a screwdriver.
Step4 Connect the other end of the PGND cable to the ground. Generally, the cabinets installed in
equipment rooms are equipped with a grounding bar.
If a grounding bar is available, you can connect the PGND cable of the router to the grounding
bar as follows: a) Use a cable stripper to strip off the insulation rubber about 15 mm (0.59 in.)
from the PGND cable. b) Wrap the naked part onto the grounding post of the grounding bar. c)
Fix the PGND cable onto the grounding post with a hex nut.
If no grounding bar is available, connect the naked part of the PGND cable to the ground
directly.
Figure 4-7 Connect the PGND cable to the grounding bar
(1) Hex nut (2) PGND cable
(3) Naked part of the PGND cable (4) Grounding post
(5) Grounding bar
The resistance between the router chassis and the ground must be less than 5 ohms.
Use the PGND cable provided with the router to connect the ground bar in the equipment room.
Otherwise, the router may not be effectively grounded, which easily causes damage to the
router.
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