Actually I just read your post again, and if I remember correctly Openserve won't change the modulation to VDSL if your linespeed is less than 20Mbps. That could be the issue. I stand to be corrected, but I'm pretty sure someone else posted a similar problem elsewhere on this forum, and that was the issue. In any case, if your linespeed is less than 20Mbps there's little benefit from switching to VDSL. Once you get to 20Mbps though VDSL gives you a much higher upload speed. On a 20Mbps ADSL profile the upload speed is 1Mbps, while on a 20Mbps VDSL profile the upload speed is 5Mbps.