Nortel Networks NN43001-504 - Manual (Page 43)

Access point planning 43
— 15% of the available bandwidth per call for 1 Mbs operation.
Note: 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 require approximately 150 kbps
of bandwidth per call. Network traffic can be monitored and analyzed
using a network sniffer or an SNMP workstation.
• Number of other wireless devices per AP—The wireless handsets can
share bandwidth with other wireless devices. To ensure adequate RF
bandwidth availability, consider the number of wireless data devices in
use per AP.
Note: In a very large or complex site, it can be advisable to contract
a professional site survey.
Effective site survey
Consider the following points for an effective site survey.
Network usage
Examine the network usage:
• How many people use a wireless handset?
• What areas of the site require wireless handset access?
• How many hours each day are wireless handsets typically in use?
• Which locations are likely to generate the largest amount of traffic?
• Where is future network expansion most likely?
Mobility requirements
Assess the mobility requirements:
• How many wireless handset users are in motion continually, such as in
a warehouse or hospital?
• How many users work from different fixed locations throughout the site?
Physical site study
Perform a study of the physical site:
• Study blueprints of the proposed site. A site blueprint provides a map of
the site, including the location of objects such as walls, partitions, and
anything else that could affect the performance of a wireless handset.
This helps identify areas where wireless handsets are less likely to
perform well. Many obstructions are not readily visible and, in some
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
.