Applying a remote tone identifies the circuit, and you can run the usual end to end pair quality test with a Hawk/JDSU/Exfo. No problems really, and since the have voltage on them, them don't get pinched (well not too often ! ).

I don't see much appetite for this from isps.

Line rental as pretty much a zero margin product. A no dial tone product would mean punters cannot check continuity and noise. It would also mean isps couldn't take the tried and tested route of referring you to your voice provider to sort out dsl faults.,

In reply to a post by CJT:

Odd question I appreciate

Does ADSL/Broadband have some technical reason why a telephone line is required to provide it?

IE why do you have to have a landline service and broadband if you ONLY want the broadband?

Is it down to the providers BT/TalkTalk etc, or down to Ofcom, or someone else?

Am just curious to know

Hi, you can have a dedicated broadband line if you have the cash.

What is Dedicated Line?
Any telecommunications line that is continuously available for the subscriber with little or no latency.
Dedicated lines are also referred to as �leased lines.�
Note: The other one is the Dial up line.

http://business.bt.com/broadband-and-internet/intern...

It is now up to 135.9 Ms ...


And I wonder what the signal strength might be? Maybe 1dBa or even -1000dBa or even -1000000dBa (dBa >>>> dB relative to 1 attowatt)