Thanks for the suggestion. It appears that AT&T likes to reserve x amount of bandwidth for a 'stellar' call experience. When we started to talk about overall speed, the tech said they ONLY care about upload speeds. I tried to reason with him that it is a two way street. He WAS agreeable and said he would lift our service to a level 3 (we were at 1) and that the TA trains itself to our usage needs. STILL 1/4 of my bandwidth available?? If we still have issues after 4 days, he'll attempt to push us to a level 4 service..
This new arrangement works like a charm. I get back my d/l speeds (even better upload) and the VOIP still appears to function properly. Of course if we ever have to troubleshoot it, they'll be a little miffed that it 'is not according to our recommended specs'!!
They said they are going to call me again in a few days to see if it is any better. I'll not hold my breath on that one.