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D-Link DIR-685 User Manual
Section 3 - Configuration
Maximum Idle 
Time:
MTU:
Connect mode 
select:
Enter a maximum idle time during which the Internet connection is maintained during inactivity. To disable this feature, enable 
Auto-reconnect.
Maximum Transmission Unit - You may need to change the MTU for optimal performance with your specific ISP. 1400 is 
the default MTU.
Use the drop-down menu to select a Schedule that determines when the router should try reconnecting to the Internet in the 
event that the Internet connection is lost. The router will list the Schedules that have been defined in the 
Tools > Schedule
window. Click the 
New Schedule
button to open the 
Tools > Schedules
window and create a new schedule (see page 88 
for instructions on how to create a New Schedule).
Click the 
Manual
radio button to specify that the Internet connection should be re-established manually, in the event of the 
router losing its Internet connection.
Click the 
Connect-on demand
radio button to specify that an Internet connection will only establish when a user or application 
tries to access the Internet.