Quality of Service checklist for voice over WLAN applications 193
RF basics and AP configuration
The following points include the characteristics of a good RF environment that uses access point parameters for Nortel wireless telephone voice communications. Only channels 1, 6, and 11 are used.
•Disable
•Fix the transmit (TX) power setting and disable
•Ensure that access points have a consistent and same power setting, unless there is a compelling reason to deviate
•Configure areas where wireless telephone users can congregate with special care:
—Position APs closer together to provide greater bandwidth for an area.
—Turn down the AP TX power.
It is a very complicated process to accomplish this task properly.
•Configure the wireless telephone transmit power levels to match the standard for the RF environment.
Consider the antenna gain used on the access points when adjusting the wireless telephone power setting.
•Ensure that there is
For this signaling requirement, all four 802.11b data rates must be available to the wireless telephones. The four 802.11b data rates are: 1Mb/s, 2Mb/s, 5.5Mb/s, and 11Mb/s.
The best configuration is for all four to be configured to Basic or Required. For
—802.11g data rates can be configured to Enabled.
—Multicast packets use only 802.11b data rates configured to Basic or Required.
—If 802.11 wireless devices are used, 5.5Mb/s and 11Mb/s can require the parameter be configured to Enabled or Supported, rather than Basic.
Ensure that there is a compelling reason to do so, before you make this change.
•Configure the Beacon interval to 100 ms and DTIM to 3.
Nortel Communication Server 1000
WLAN IP Telephony Installation and Commissioning
Release 5.0 15 June 2007
