TP-Link TD-8817 - Manual (Page 56)

TD-8817 ADSL2/2+ Ethernet/USB Router User Guide
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Figure 4-44
4.6.5 Diagnostic
Choose “Maintenance→Diagnostic”, 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 4-45).
Figure 4-45
4.7 Help
Choose “Help”, you can view the help information for configuration of any function.