TD-W8901G 54M Wireless ADSL2+ Modem Router User Guide
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Figure 4-50

4.6.5 Diagnostic

Choose “MaintenanceDiagnostic”, you can view the test results for the connectivity of the
physical layer and protocol layer for both LAN and WAN sides in the screen (shown in Figure 4-51).
Figure 4-51
4.7 Help
Choose “Help”, you can view the help information for configuration of any function.