Check this out from the owner of the local ISP. It's an email written to one of his former customers. I changed the to and from to protect the innocent and the obnoxious.
Former income source,
"No modem except ISDN hooks at more than 33.6kbs. The new V.92 standard hopes to improve on that, but it is wholly dependent on telephone line conditions. I can set our modems to tell everyone they are hooked at 56.7kbs, but that would be a lie; instead, we opt to set our modem return string to deliver the actual connect speed. But you and everyone else knows much more than I do, so I hope you at least take the time to vist the following URL. I did not write the V.90 Modem Standard, but I fully understand it.
http://www.v90.com/whatis.htm
Problem is, you have "copper wires" comning into your home, and shop. Sorry to say, Copper Telephone wiring is not capable of the "Digital Connections" required to obtain the full 56kbs potential, or even more than 33.6kbs."
ISP Owner/Operator
After months of his telling these people and his other customers they could not possibly achieve more than 33.6 at their location, I visited these people one day, changed them to the ONLY other provider and they are now connecting regularly at 49(kbs?)
Glad to know he "did not write the V.90 Modem Standard".