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DSL-522T ADSL Router User Guide
PPP
When the WAN connection is configured for either PPPoA or PPPoE, you can configure the Router’s PPP session to remain on all the time, or to disconnect after some period of no activity. You may also choose to instruct the Router to connect each time you want to access the WAN or the Internet.
PPP Connection window
If you want the Internet or WAN connection to be available any time a host on your LAN requests access, select the Always On option.
If your ISP account is billed according to the amount of time the Router is connected, choose the Connection On Demand option. You can configure an idle time in minutes to disconnect the PPP connection after a period of inactivity. This will discontinue the PPP session and require a few seconds to reconnect when a host requests access to the WAN. Alternatively you can choose the Manual option and use the Connect button to initiate a PPP connection each time you want to use the Router to access the WAN. If you use the Manual option, you must return to this menu and click the Disconnect button to terminate the PPP session.
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