SpectraLink NetLink Wireless Telephones Best Practices White Paper Wireless Telephone manual

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White Paper

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.

2.1.2Wireless 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.

2.2Channel 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,

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Contents Deploying NetLink Wireless Telephones Wireless LAN Layout Considerations White Paper IntroductionWhite Paper Non-interfering, Overlapping 802.11b Channel Coverage Provides consistent coverage Access Point Bandwidth Considerations White Paper Telephone Usage Users Supported per Access Point White Paper Network Infrastructure Considerations TftpWhite Paper White Paper Quality of Service Data transmission rate of 2 Mb/s White Paper Security Security ConcernsUtilizing VLANs White Paper Deploying NetLink Wireless Telephones with a VPN White Paper NetLink Wireless Telephones and Subnets Conclusion Subnets and IP Telephony Server Interfaces