I don't think that will help with cable broadband it's for the ADSL option only, cable doesn't use the phone line. Also this thread had been dormant for 7 months so you'd hope a solution one way or the other had been found
Just a quick note also, the iPlate is not a solution to external noise, it acts as a microfilter on the master socket of the home preventing noise getting into the DSL portion of the spectrum from other extensions in the home but can do nothing for noise external to the home.