YOU WILL NEED AN ADSL MICRO FILTER ON EACH OF YOUR PHONE SOCKETS THAT ARE IN USE.
BT TELEPHONE BROADBAND ADSL MICRO FILTER SPLIT 191112473 MFG:DSL472
Telephone Broadband ADSL Adaptor
ADSL Microfilter RJ‑11/BT Female to BT Male | Modem Telephone Broadband Splitter
ADSL Microfilter BT Sky Micro Filter RJ11 Modem Telephone Broadband
RJ11 to RJ11 ADSL Cable Modem Router Fast Sky Broadband BT Telephone Phone Lot
RJ11 to RJ11 ADSL ROUTER Cable TELEPHONE Lead for SKY BT PHONE BROADBAND LOT
