Have just converted my Telkom line to 20mb VDSL . Have tried two different modems TP Link ADSL 2A and a Technicolour VDSL Modem. There is hardly any difference in speed on either modem. Really thought VDSL modem would be faster. Speed of 17.52 download, which is pretty good, but upload speed is pathetic 1.5 . Has anyone tried the Vox VDSL and is it better than Telkom .