|simple. someone comes here asking for help. I don't consider telling them to call the telephone company right off the bat help.|
Now if the time had been taken to troubleshoot the issue as to why one line is fine and this one is not, that would be a different issue.
If there was a line problem then it would affect all phones and internet. OP reports one phone works fine and no mention of internet.
Also being a telephony guy I have found simple things like a bad splitter or some corrosion on the telephone outlet cause static and these are easy to fix by the homeowner.