What you are asking about is called 'Naked DSL'
No the OP is enquiring after MPF or SMPF.
I would imagine that they are probably thinking of the lost revenue from no longer having to force people to have a 'phone line' when they don't need it.
How would this 'naked DSL' get from A to B without a 'phone line' ?
I've also read in the past, that people with Naked DSL often found that their line got disconnected, as when an engineer went to a street cabinet to find a free pair to the exchange, as there was no dial tone on the line when they listened across the pair, they reused the connection back to the exchange.
AFAIK there is only one supplier who puts nothing but data down the line, all the other data only services use DC whetting, so at very least there's polarity on the line. It's not the E-sides that get pinched, it's the D-sides, but then most engineers test phones have a digital services alarm on them, so they would know there was 'something' on the line.



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