Avaya Communication Server 1000 Installation And Commissioning Manual page 51

Figure 4: 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 Compatible Access Points
• 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
- 15% of the available bandwidth per call for 1 Mbs operation.
Important:
These requirements mean that areas with a high-use density must receive RF coverage
at the highest data rate of operation.
• LAN bandwidth—Estimate anticipated peak call volume to ensure that enough bandwidth
is available to handle the network traffic generated by all the wireless handsets. Handsets
Avaya WLAN IP Telephony Installation and Commissioning
on page 257.
Access point planning
November 2010 51