Nortel 2360 Configuration Manual page 621

period of the idle timer, WSS Software changes the client's session to the Disassociated state. The default idle timeout
value is 180 seconds (3 minutes). You can change the timeout to a value from 20 to 86400 seconds. To disable the
timeout, specify 0.
Keepalive probes and the user idle timeout are configurable on a service-profile basis.
Note.
WSS Software temporarily keeps session information for disassociated web-portal
clients to allow them time to reassociate after roaming. (See
Web-based AAA session timeout period" (page 512).)
Nortel WLAN—Security Switch 2300 Series Configuration Guide
Managing sessions 621
"Configuring the Web portal