said by dslx_gm :

Hi

I took a look at the last ticket on your account and it indicated that there was static on your phone line. Static on the phone line can cause issues with your DSL service and cause your line to become intermittent. Our team recommended that you give 611 a call to have that static issue corrected as that will likely correct the issue. Have you had an opportunity to give them a call?

Yes, they could not find a problem with my line and the static noise is gone now.

Sometimes static or an intermittent connection can be caused by a phone or device being connected to the phone line that isn't properly filtered. How many phones do you have connected to the phone line?
1 phone, 1 alarm system
Do all of those have filters on them? Do you have any other devices like an alarm system or TV receiver that connect to the phone line? If so are those filtered?

Yes, they are filtered.

How long is the phone cable between the modem and wall jack?

6ft

Thanks