A developing technology that promises much higher data rates over relatively short distances (up to 52 Mbit/s over lines up to 1,000 ft or 300 m in length). It is envisioned that VDSL may emerge somewhat after ADSL is widely deployed and coexist with it. The transmission technology (CAP, DMT, or other) and its effectiveness in some environments have not yet been determined; however, a number of standards organizations are currently working on it.