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5.2.4. Connecting the antennas to the Cisco FM4500 Mobi
QMA antenna connections
IMPORTANT
The FM4500 Mobi is ingress-protection rated to standards
specified by EN 50155 and EN 45545.
To ensure the FM4500 Mobi remains waterproof and dustproof,
follow all instructions in this section.
Following the instructions in this section will also ensure that
the FM4500 Mobi is well prepared for any ingress-protection
testing.
Radio antennas are connected to the Cisco FM4500 Mobi using quick-
disconnect sub-miniature version A (QMA) connectors.
WARNING
Before activating the unit, make sure that all RF feeds are
securely connected to an appropriate antenna. Never activate
any transceiver unit that is not connected to an antenna.
Fluidmesh uses copper-tin-zinc-plated female QMA connectors. These
connectors are capable of corrosion resistance that exceeds the demands
imposed by
ASTM B117
immune to corrosion, provided that they do not remain in contact with
standing salt water for long periods of time.
In the opinion of Fluidmesh engineers, certain brands of QMA plug have
shown outstanding performance. We can confidently recommend the
following brands:
• Amphenol
• Huber+Suhner
• Rosenberger
• Radiall
CAUTION
Do not remove the protective rubber sleeves from a female
QMA plug (below) if an antenna will not be connected to the
plug. Unprotected QMA plug contacts that are exposed to
water will oxidize, causing degraded performance.
© 2021 Cisco and/or its affiliates. All rights reserved.
salt spray testing. The connectors are virtually
Hardware installation
Page 38 of 174
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