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309-2273-001AA.fm Page 2 Monday, February 3, 2003 4:54 PM
The following illustration shows the point-to-multipoint topology (also known as Infrastructure Network
Mode) using an omnidirectional antenna atop the central building, (which is attached to the central AP
inside) with a 3Com Wireless LAN bridge mounted on the other buildings.
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Before you start
NOTE: This equipment must be installed in compliance with local and national building
codes, regulatory restrictions, and FCC rules. For the safety of people and equipment, only
professional network personnel should install the bridge, cables, and antennas.
If you encounter problems while installing the bridge, insert the installation CD into your computer and
review the installation information in the User Guide.
Make sure that you have the following items ready for the installation:
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For a point-to point configuration, two 3Com outdoor bridges.
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For a point-to-multipoint configuration, one 3Com 11Mbps Wireless LAN Access Point
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8000 (or other Wi-Fi compliant access point) with an omnidirectional antenna for one
building, and one 3Com outdoor bridge for each other building.
Mounting hardware (supplied with each bridge).
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Properly grounded outdoor mast or wall mount.
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Lightning arrestor properly grounded at each building in the topology.
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NOTE: A lightning arrestor will not prevent damage from a direct lightning strike. It will,
however, protect networking equipment inside the building (as well as the people working
there) from lightning-induced surges that travel over Ethernet cables. To avoid damage from
direct lightning strikes, mount the bridge at least 1 Meter (3 feet) below the top of the
mast or pole.
Outdoor rated category 5 Ethernet cable (3Com part number 3CWE487 recommended).
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If you do not have IEEE 802.3af power-over-Ethernet LAN equipment, use the 3Com
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Integrated Power-over-Ethernet power supply and power cord that comes with the bridge.
If your LAN equipment complies with the IEEE 802.3af power-over-Ethernet standard, you
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can connect directly to the equipment, and the power supply is not needed.
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