ADSL2+ Modem Router User Manual
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4.5.6.6 Diag-test
The Diagnostic Test allows you to test your DSL connection of the physical layer and protocol
layer for both LAN and WAN sides.
Go to Maintenance->Diagnostics-> Diag-test page, you can select a interface to run diagnostic
Click the “Run Diagnostic Test” button to start the test, and then wait several times later you
can see the diagnostic result.