On 26/08/2013 22:44, Tim Streater wrote:

Its done at the IP layer.
The customers ATM circuit does not get as far as the ISP on the ADSL
services.

Whose idea was this, then, and why.


No idea, to hide the underlying architecture from the service they sell
I would think.
You wouldn't want the ISP to have ATM to the customer as that would
allow them to offer QOS.