TP-Link TL-MR3420 User Manual page 38

when you attempt to access the Internet again. If you want your Internet connection keeps
active all the time, please enter "0" in the Max Idle Time field. Otherwise, enter the number
of minutes you want to have elapsed before your Internet access disconnects.
Connect Automatically - The connection can be re-established automatically when it was

down.
Time-based Connecting - The connection will only be established in the period from the

start time to the end time (both are in HH:MM format).

Note:
Only when you have configured the system time on System Tools -> Time page, will the
Time-based Connecting function can take effect.
 Connect Manually - You can click the Connect/ Disconnect button to connect/disconnect
immediately. This mode also supports the Max Idle Time function as Connect on Demand
mode. The Internet connection can be disconnected automatically after a specified inactivity
period and re-established when you attempt to access the Internet again.
Caution: Sometimes the connection cannot be terminated although you specify a time to Max
Idle Time, since some applications are visiting the Internet continually in the background.
If you want to do some advanced configurations, please click the Advanced button, and the
page shown in Figure 4-13 will then appear:
MTU Size - The default MTU size is "1480" bytes, which is usually fine. It is not

recommended that you change the default MTU Size unless required by your ISP.
Service Name/AC Name - The service name and AC (Access Concentrator) name, which

should not be configured unless you are sure it is necessary for your ISP. In most cases,
leaving these fields blank will work.
TL-MR3420
Figure 4-13 PPPoE Advanced Settings
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3G/4G Wireless N Router User Guide