Nortel 2221 Product Manual page 23

A wireless infrastructure can also support roaming for mobile workers. More than
one access point can be configured to create an Extended Service Set (ESS). By
placing the access points so that a continuous coverage area is created, wireless
users within this ESS can roam freely. All Nortel Networks Wireless LAN--Series
2200 wireless network cards and adapters and Access Point 2220/2221 wireless
access points within a specific ESS must be configured with the same SSID
.
Desktop PC
Switch
Access Point
PC with Wireless
PCI Adapter
Using the Nortel Networks Wireless LAN Access Point 2220/2221
Chapter 2 Network Configuration and Planning
File
Server
Switch
Access Point
Notebook with Wireless
PC Card Adapter
<ESS>
<BSS1>
Seamless Roaming
Notebook with Wireless
PC Card Adapter
<BSS2>
23