D-Link DSA-3100 Owner's Manual page 24

Using the Configuration Utility (continued)
User Control:
Session
Length:
Logout Timer:
Multiple Login:
Guest Account:
Home > User Manager
Select Enable to define Logout TImer and Multiple Login:
Limit the duration of each session established by the
general account from 5 minutes to an unlimited period.
When enabled, on-line users who become inactive on
the network after a specified period of time will be logged
out automatically. The period can range from 1~1440.
10 minutes of time is the default value.
Check this function to allow a single user account to log
into the system multiple times.
Select Enable to activate the Guest Account feature for visitors
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