Originally Posted by KISS
I've delved all the info I have already on here. So filters, splitters, etc. I have no clue about.
But from reading what you typed it sounds as if it should have never worked in the first place. Yet the fax/phone and the DSL modem were connected before with no problem. A new credit card machine was "Installed" (Plugging into the DSL Modem), after not working, the internet went down.
(This makes it sound like it's the Credit Card Machines fault, to which it could be I guess, but it works fine on the other jack, as explained below)
With just fiddling around I found that switching the modem to what WAS the phone jack (Phone working at this point) fixed the Modems problem. Internet was gained again. Though plugging the Phone into what was the Modem's jack left the phone and fax not working. (As the modem was moments earlier)
Dial tone could be achieved with this "Non-Working" jack, but no calls/faxes could be received. Much in the same way the Modem could find the IP all right with the same jack, but DNS checks couldn't be passed.
I have to assume that either:
A.)The jack itself has just gone bad (Relatively new building, so kind of surprising)
B.)Some wires came loose within the jack, or like you said at the beginning, a bent contact. (Quite could be this. Is there one contact that strictly controls incoming signals?)
Either way you don't need to trouble yourself with trying to solve this puzzle anymore. This was mostly just myself pursuit of knowledge since this just seemed kind of weird.
Thank you again for the time spent reading and replying. I really appreciate it.