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2
Bridge Link Planning
maximum wind velocity and direction at the site and be sure that any supporting
structure, such as a pole, mast, or tower, is built to withstand this force.
• Lightning — The wireless bridge includes its own built-in lightning protection.
However, you should make sure that the unit, any supporting structure, and cables
are all properly grounded. Additional protection using lightning rods, lightning
arrestors, or surge suppressors may also be employed.
• Rain — The wireless bridge is weatherproofed against rain. Also, prolonged heavy
rain has no significant effect on the radio signal. However, you may want to apply
sealing tape around the Ethernet port connector for extra protection. If moisture
enters the connector, it may cause a degradation in performance or even a
complete failure of the link.
• Snow and Ice — Falling snow, like rain, has no significant effect on the radio
signal. However, a build up of snow or ice on antennas may cause the link to fail.
In this case, the snow or ice has to be cleared from the antennas to restore
operation of the link.
Ethernet Cabling
When a suitable antenna location has been determined, you must plan a cable route
form the wireless bridge outdoors to the power injector module indoors. Consider
these points:
• The Ethernet cable length should never be longer than 100 m (328 ft)
• Determine a building entry point for the cable
• Determine if conduits, bracing, or other structures are required for safety or
protection of the cable
• For lightning protection at the power injector end of the cable, it is recommended
to use a lightning arrestor immediately before the cable enters the building
Grounding
It is important that the wireless bridge, cables, and any supporting structures are
properly grounded. The wireless bridge unit includes a grounding screw for
attaching a ground wire. Be sure that grounding is available and that it meets local
and national electrical codes.
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