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 Block Terminal Junction Box BT Openreach ADSL Phone Connector
Genuine BT80B RF3 Connection Connector Terminal Phone Box RFI Suppression Iplate
Genuine BT80B Block Terminal Low Voltage Wiring Connector BT Openreach New
Genuine BT80B RF2 Connector Terminal Phone RFI Suppression Unit
Genuine BT Logo BT80b Block Terminal Telephone Junction Connector Box 80a
Genuine BT Logo BT80b Block Terminal Telephone Junction Connector Box 80a x 2
