You are right Sergey, I should have included it in the first post.
I have made it as simple and short as possible, here it is:
I'm using c7200-adventerprisek9-mz.124-24.T8 for both and added a PA-A1 module in slot1. Both routers are connected with that atm interface.
I attached the config files. Dialer1 stays idle, it looks like I'm missing something to bind dialer1 to atm1/0.
In Cisco documentation (like this one https://www.cisco.com/c/en/us/support/docs/long-reach-ethernet-lre-digital-subscriber-line-xdsl/asymmetric-digital-subsc… ), there is this line: "encapsulation AAL5mux ppp virtual-template". It is not available in my case, and I do not know if instead using "encapsulation aal5snap" then "protocol ppp" is the same. Why is it missing?
Thanks for your help,