BT80b RF3 allows it to be used on lines which carry ADSL signals. The RF3 version is upgraded from RF2 which reduced ADSL performance.
Genuine BT80B RF3 Connection Connector Terminal Phone Box RFI Suppression Iplate
Genuine BT Logo BT80b Block Terminal Telephone Junction Connector Box 80a
Genuine BT Logo BT80b Block Terminal Telephone Junction Connector Box 80a x 2
BT80b Block Terminal Telephone Junction Connector Box X 6
BT80b Block Terminal Telephone Junction Connector Box 80a
