BT 80B RF3 Junction Box (3 way IDC to 3 way screw).BT Branded.

Junction box with RFI protection, the series inductor helps protect telephony equipment from radio frequency interference induced on to the telephone line. This version is suitable for use on ADSL lines as the inductor does not strip the ADSL signal (like the BT80A RF2!). The inductor in this junction box is the same as the one fitted to the BT I Plate/BT Broadband Accelerator . Fit to eliminate small Repetative Electrical Impulse Noise (REIN) which can affect Broad Band ADSL lines.