Nortel Networks NN43001-504 manual Effective site survey, Network usage, Mobility requirements

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

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WLAN IP Telephony Installation and Commissioning

NN43001-504 01.02 Standard

Release 5.0 15 June 2007

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