My phone line developed a fault recently which I am trying to rectify. I diagnosed the fault to the Mk3 BT Infinity VDSL Faceplate. With Broadband connection disconnected (RJ11 plug removed) the phone worked fine; reconnect and the phone stopped working, but the broadband connection worked fine. BT did a line test and a Broadband check, both fine with no fault found.
I fitted a new Faceplate and fault was fixed. However a week or so later the fault reoccurred, exactly as before. I thought that the fault could be with the connecting BT Openreach VDSL Modem so have ordered a replacement (note that BT will no longer replace these under contract warranty cover [great service]). The plan was to replace both Faceplate and Modem. However it occurred to me that the Faceplate passive filter network could have suffered lightning damage. There was a storm just before the second failure, I believe.
Does anyone have experience of any such damage? I don't expect there is any protection for the filter network (eg transorb), but it would be easy to fit such a device. Anyone done this?
If this is indeed the cause then BT should make their customers aware, and recommend they replace the Faceplate when such a fault is a possible cause.
Does anyone one know if BT or Openreach have done any research on the possibility of such damage? The Phone Network is generally robust, but the addition of Broadband circuitry introduces more succeptable equipment.
