Installation Guide

12 Aruba MSR4000 Wireless Mesh Router | Installation Guide
If radio interference is still a problem with your wireless bridge or mesh link, changing the antenna
direction may improve the situation.
Weather Conditions
When planning wireless bridge or mesh links, you must take into account any extreme weather conditions
that are known to affect your location. Consider these factors:
 Temperature: The wireless bridge or mesh link is tested for normal operation in temperatures from -30ºC
to 55ºC. Operating in temperatures outside of this range may cause the unit to fail.
 Wind Velocity: The wireless bridge or mesh link can operate in winds up to 165 miles per hour. You must
consider the known 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: To protect against lightning induced surges, the MSR2000 requires lightning protection on the
radio interface ports.
 Rain: The wireless bridge or mesh link is weatherproofed against rain. However, it is recommended to
apply weatherproof sealing tape around the Ethernet port and antenna connectors for extra protection.
If moisture enters a 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 buildup 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 from the wireless
bridge or mesh link outdoors to a suitable power and/or network source.
Consider these points:
 The Ethernet cable length should never be longer than 90 m (295 ft).
 Determine a building entry point for the cable (if applicable).
 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, consider using a lightning arrestor
immediately before the cable enters the building
Grounding
It is important that the wireless bridge or mesh link, cables, and any supporting structures are properly
grounded. Each MSR4000 access point includes a grounding screw for attaching a ground wire. Be sure that
grounding is available and that it meets local and national electrical codes. Ground the access point first
using the external ground stud on the unit before making any other connection.
Weatherproofing Connections
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An Aruba Lightning Arrestor, AP-LAR-1, must be installed on each antenna port for protection against lightning
induced surges. Failure to use an AP-LAR-1 can void the warranty of an Aruba outdoor AP model and renders the
AP susceptible to failure from lightning induced surges