(Telecompaper) The European Commission has opened an in-depth investigation into the German regulator's plan to allow Deutsche Telekom to roll out VDSL vectoring. The EC said it's concerned the proposal does not offer sufficient options for rivals using DT's infrastructure and could limit competition and investment in faster networks. The Commission, which has the right to comment on all ex ante telecom regulation before it takes effect, said the alternative access solutions offered by the regulator BNetzA are "not sufficient to ensure an appropriate safeguarding of competition, including competition to invest, both now and in the future".