Solutions
Check that the telephone wall jack works by connecting a phone to it and testing it. If you cannot make or receive calls, contact your telecommunication company.
Solutions
Select Settings > Fax Settings > Check Fax Connection on the printer's control panel to run the automatic fax connection check. Try the solutions printed on the report.
Solutions
Select Slow(9,600bps) in Settings > Fax Settings > Basic Settings > Fax Speed on the printer's control panel.
Solutions
To connect to a DSL phone line, you need to use a DSL modem equipped with a built-in DSL filter, or install a separate DSL filter to the line. Contact your DSL provider.
Solutions
If you can not send or receive fax, connect the printer directly to a telephone wall jack to see if the printer can send a fax. If it works, the problem may be caused by the DSL filter. Contact your DSL provider.