Cisco AIR-BR1410A-A-K9 - Aironet 1410 Wireless Bridge Deployment Manual page 26

Fresnel Zone Clearance in feet for a particular Path Length
Table 5.
4.4 Determining the coverage distance required
Determining the coverage distance in a strictly point to point Bridge link is easy. A Point to Point
Bridge link is one in which only two locations are connected.
Point-to-Point Bridge Link
Figure 23.
As you can imagine, when linking only two sites your antenna choices become easier as you only
need to concentrate your radio signal in one direction at the target Bridge and vice versa. When
two or more Bridges are used the primary Bridge is identified as the Root or main site while the
other sites are designated as Non-Root sites.
When operating in Point to Point mode the 1400 series Bridge can be ordered with an integrated
22.5 dBi antenna making it a simple one piece outdoor unit. The Point to Point range with the
integrated antenna is 7.5 miles at 54 Mbps or up to 16 miles at 9 Mbps.
The integrated antenna is the most popular choice as this can be deployed rapidly and easily
assembled as a one piece installation on a building or tower.
For longer range up to 12 miles at 54 Mbps or 23 miles at 9 Mbps the bridge could be ordered
with the optional higher gain and slightly larger 28 dBi external dish antenna.
Copyright © 2004 Cisco Systems, Inc. All rights reserved.
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