Billion BiPAC 7800GZ(L) User Manual page 182

Problem with LAN interface
Problem Suggested Action
Check the Ethernet LEDs on the front panel.
Cannot PING any PC on LAN
The LED should be on for the port that has a PC
connected. If it does not lit, check to see if the cable
between your router and the PC is properly
connected. Make sure you have first uninstalled
your firewall program before troubleshooting.
Verify that the IP address and the subnet mask are
consistent for both the router and the workstations.
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