been reading a bit about this; its quite a change from the days when the PTT used to be really paranoid about any customers equipment feeding electricity back down the line.
Interesting concept but I’ve got a few concerns about the quality of the power supplies used for this cheap CPE [customer premises equipment] on top of any poor quality telephone wiring in buildings (some of them are capable of sending 120 volts DC down the twisted pair, this is unpleasant if you accidentally make contact with any cable energised to this voltage) as the effects on electromagnetic interference as a whole; especially in urban areas where there are a mixture of houses with TN-S and TN-C-S earthing (so any rubbish ends up on the combined/neutral earth and can upset equipment elsewhere down the street).
The ETSI boffins do seem to be addressing these issues but the private telephone companies and vendors are all suggesting their own different solutions (which might vary across regions). I can understand why it is being considered as earlier I was walking past a VDSL street cabinet and could hear the trafo noise from outside (meaning that its power supply is being run hard) but why not just put the boxes in the streets anyway and use the existing 230V supply for street lamps.
In many regions now draws less power as the sodium lamps are being replaced by LEDs. That would keep all the complex adaptors and the rough noisy signals away from the houses (where they could quite likely even make listening to VHF radio (both traditional FM and DAB near impossible if not properly filtered..)
For those with a bit of electronics and telecoms knowledge (its not too heavy to be fair) the ETSI paper is below (for some reason I can’t attach it as the software thinks its a PNG image).
https://www.etsi.org/deliver/etsi_ts/101500_101599/101548/01.01.01_60/ts_101548v010101p.pdf
