Comtrend Corporation Wireless-N Broadband Router User Manual page 35

MTU - Please use the default value if you don't know what it is, or ask your
service provider for a proper value.
Connection Type - There are 3 options:
'Continuous' - keep Internet connection alive, do not disconnect,
Connect on Demand - only connects to the Internet when there's a
connection attempt,
'Manual' - only connects to the Internet when the 'Connect' button on this
page is pressed, and disconnects when the 'Disconnect button is pressed.
Idle Time Out: Specify the time to shutdown the Internet connection after no
Internet activity is detected by minute. This option is only available when
connection type is 'Connect on Demand'.
35