Unplug the modem and check for noise or static on the telephone line.Is there dial tone in this phone jack? If no dial-tone, check the other jacks for this phone number.
Ensure that your modem is plugged into a wall jack on the same phone number that your DSL Internet service is assigned to. This can be done by unplugging it, leaving off for 1 minute, and then plugging back in.Įnsure that the telephone cable is securely connected to both the modem and the telephone wall outlet. Please review the troubleshooting steps below.Įnsure your modem is plugged in, and powered on. This can be caused by many different factors, so complete and thorough troubleshooting on this issue is needed. Loss of line sync occurs when your modem's "DSL" “Broadband”, or "Line Sync" light is flashing or completely off. 
It must be present for anything to work properly. Line sync is to DSL internet what Dial-Tone is to your normal home phone. Troubleshooting or "ADSL" or "DSL" or "Broadband" light is blinking or off on modem/gateway
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