A red missile
Just open up your face plate and remove the bell wire. Thats all they do (well they add an inductor in too to get rid of noise)
I put one on here and also removed the bell wire too and got the same results (higher speed). You in a new build or an old build?? I think bell wire is orange pin 3.
http://www.draytek.co.uk/support/kb_vigor_linefaults.html