Cisco Aironet 1850 Series Deployment Manual page 53

Tip When mounting antennas outside, always mount with the WIRES DOWN and never obstruct or put
weather proofing material over the drain holes.
Figure 42: Always Mount Antennas Outdoors with Leads DOWN (Indoors Does not Matter)
Figure 43: If Antenna Connectors are Exposed to Weather – Coax-Seal Should be Used but if Present, Do Not Cover Antenna Drain Holes
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