Landline crackle interference

[Gladys2]

Landline crackle so bad you can not hear. Have tried a different phone with direct plug in (not remote) and this has the same issue. 

[Mark39]

Are you new to Sky landline/broadband? Or has your Sky landline worked ok up to now?

Try the line test here, even if your broadband is working ok:

https://www.sky.com/help/articles/broadband-diagnostic-start