SpectraLink NetLink Wireless Telephones Best Practices White Paper Wireless Telephone - Manual (Page 4)

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Page 3
voice is an application on the wireless LAN because the coverage area
of the AP will be greatly reduced. If a site requires configuring the APs
to only negotiate at the higher rates, the layout of the wireless LAN must
account for the reduced coverage and additional APs will be required to
ensure seamless overlapping coverage at the higher rates.
2.1.2 Wireless Bridges Wireless bridges are used to connect Ethernet LANs or extend the range
of existing wireless LANs. Such devices generally create bottlenecks for
network capacity and add delay to the overall network, which is not
tolerable in the boundaries of QoS requirements. SpectraLink does not
support a configuration that includes wireless bridges and does not
recommend using wireless bridges within any wireless voice network.
2.2 Channel and
Power
Considerations
Adjacent APs need to use different radio channels to prevent
interference between them. The 802.11b standard utilized by NetLink
Wireless Telephones provides three non-interfering channels: channels
1, 6, and 11 for North America. Access points within range of each other
should always be set to non-interfering channels to maximize the
capacity and performance of a wireless LAN, as shown in the diagram
below:
Non-interfering, Overlapping 802.11b Channel Coverage
The transmission power of APs can also be increased or decreased to
provide more or less AP coverage area. Generally, the transmit power
setting should be the same for all APs in a facility. This minimizes the
chance of higher-power APs interfering with nearby lower-power APs,