Bonjour,
So, ATM is dead, nobody knows it anymore.
I will try to reply to my question.
The ATM DSLAM is an ATM switch, so the architecture above ATM is not change to go to the BAS. It's just below ATM it is modified, ADSL from the local loop, and PDH or SDH to the BAS.
If it is your question, RFC 2684 is terminated to the BAS.
Thanks Michelot,
Michelot