[nunyadam]

I have SBC/ATT and a speedstream 4100. The 5100 should work just fine unless there is something really different between the models.

run a speed test on there site and see if your getting what you are paying for. I upgraded my package last year and they upped my upload, but not my download speed. I had to spend a hour or so checking everything in my setup. (ran new phone line, cut it down to one phone,etc,etc...) in the end I proved they were at fault and in just a few seconds the guy bumped my speed up to what it should be.

Download = 5.062 Mbps
Upload = 661.59 kbps

I just ran that and i have a few other programs running on the net right now, so it is well within spec.

SBC's test site. http://helpme.att.net/dsl/speedtest/