BT Wholesale want to look green, I call it cost cutting.

See the think broadband article here .

From a diagnostic standpoint it's a potential nightmare without well formatted readouts from diagnostic tools, Root cause analysis will not just involve simply looking at the individual line, but more increasingly their neighbouring lines as well to see if there power state changes are effecting your customers line.

Yes it is green and good but if it's causing a bigger headache then I feel it'll not be worth. Think about all the petrol consumption of those SFI (Special faults Investigation) engineers. With the switch to fibre surely they should be concentrating of reducing power output there with increase performance instead of tampering with what will hopefully be a redundant technology in the next 20-30 years.

http://www.broadband-forum.org/technical/download/TR-202.pdf