Edimax BR-6524n Manual page 37

Idle Time Out
TTL
If you wish to select another connection type as broadband connection
type, click 'Back'; or you can click 'OK' to finish with quick setup.
You'll see the following messages:
Please click 'Apply' to save changes you made and restart the broadband
router, this requires about 30 seconds and the broadband router will stop
responding (this is normal and is not malfunction). You can reconnect to
this broadband router and continue on other settings later.
Internet when there's a connect attempt,
Manual - only connects to Internet when
'Connect' button on this page is pressed, and
disconnects when 'Disconnect button is
pressed.
Please specify the time to shutdown internet
connect after no internet activity is detected in
minute(s). This option is only available when
connection type is 'Connect on Demand'.
Time-to-live (TTL) is a value in an Internet
Protocol packet that tells a network router
whether or not the packet has been in the
network too long and should be discarded.