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42 Planning
the Site Survey mode displays signals only from APs on the same
Extended Service Set ID (ESSID), check for signals from APs using all
ESSIDs to avoid channel overlap.
Figure 3
Frequencies used by b radio
•
Wireless handset range—Wireless LAN coverage must be available
wherever wireless handsets are used. Although the typical range
for a wireless handset is comparable to that of a laptop computer
utilizing a wireless LAN PC Card, the range can not be exactly the
same. Therefore, it is preferable to use a handset to carry out the site
survey, if possible. Remember that wireless handsets might be used in
areas where data devices are not typically used, such as stairwells,
washrooms, hallways, and outdoor areas.
• Number of wireless handsets per AP—Estimate the number of wireless
handsets and the anticipated call volume per AP area to ensure that the
maximum number of calls per AP is not exceeded. For the maximum
number of calls per AP for each supported manufacturer, see Appendix
"Compatible Access Points" (page 223).
•
The data rates at which the wireless handsets operate—Higher data
rates (such as 11Mbs) can only be sustained while well within the range
of the AP. If the wireless handsets are operating near the limits of the
radio frequency (RF) coverage from the AP, they automatically drop
to 1 Mbs operation.
handsets require approximately:
— 7% of available bandwidth per call at 11 Mbs operation
— 10% of the available bandwidth per call for 2 Mbs operation
Nortel Communication Server 1000
WLAN IP Telephony Installation and Commissioning
NN43001-504 01.02 Standard
Release 5.0 15 June 2007
Copyright © 2004-2007, Nortel Networks
.