Right let's get a few things straight. The original problem months ago was the fact the op's Digital Voice service was not configured. None of your posts have gone any way to address that.
Secondly, optical amplifiers and optical repeaters are NOT powered by the received optical signal, they require a power source.
If you want to understand how optical amplifiers work, Google EDFA and Raman.
@alastaircparker wrote:
Sorry for the long post, but please let me know what you and others think about all this, before I close my BT Community account!
Alastair C Parker (a mega PC and CBM Amiga user since 1988!)
Please hurry up and do that as so far what you have posted is off topic and no use to any one let alone the OP of this thread!!