Nortel Networks NN43001-504 manual Frequencies used by b radio

42Planning

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

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