A cheap and easy solution!
After a few days of brainstorming trying to figure out how to completely isolate my telco line from my VOIP line, I thought about trying one of those RF phone jack extenders. The transmitter unit deals with whatever crap the phone company is sending and selectively transmits the voice frequencies to the receiver.
The receiver then emulates a clean phone line that is not referenced to ground anywhere which should not give me any sort of unbalanced, hum-inducing condition. This was my theory, anyway.
Well, $50 and a few minutes later, my problem was solved! I know this is not a "professional" solution, but look at what I am dealing with... a pieced-together kludge of a system! So what's one more kludgie piece??? Hey, it works great, I get to keep the (most likely, crappy) phone that I like, and I am happy. Just thought I would post this for anyone out there with a similar problem.
Thanks again to everyone for your input... it got my brain going and really did help.
