I contacted AT&T, they could not locate any local problems so they said it must be either (1) caller's long distance company or (2) our toll-free provider.
I contacted toll-free provider and told them the problem, next day their customer rep said "problem was fixed" (which was written on her screen, so we don't know the technical details.)
In both cases I supplied the same phone number which I believe the problematic one, according to my own records (but again, I assume I isolated the problem just because I heard the bad static when I bypass the phone system on that particular line).
No static calls so far, fingers crossed.
Thanks for all the help.
- Deniz
snipped-for-privacy@gmail.com wrote:
Thanks for the response. I will try to isolate the problem. Thankfully
> phone system comes with an internal logging system so when someone
> reports a bad call I can look it up and find which landline was having
> that problem. So far I don't have enough data to find a pattern (well,
> yes first 2 lines are the one with most problems so far but it could be
> just because they are used the most).