I've noticed that after about two years of using DSL there all of the sudden is real bad static on our phone lines. I thought I heard somewhere that the DSL filters have a lifespan of about 2 years. Is this correct and would you imagine this is what is causing noise on my phone line?
If your filter is not working correctly that would definitely explain the noise. However I doubt filters have a lifespan of 2 years. Have you recently got a new home phone, cable television, home security system? All these things can also cause interference