I'm sorry I don't have any 867 to do some tests.
For sure, you need to go on your controller and change the operational mode in vsdl2.
Then for the configuration, you can refer to Cisco documentation: https://www.cisco.com/c/en/us/td/docs/routers/access/800/software/configuration/guide/SCG800Guide/SCG800Guide_chapter_010110.html
If you have any issues, let me know, we can maybe a setup a webex to figure it out.
Again, I'm not able to give you more hints as I don't have any of these routers here.
Normally, you need (after changing the controller), to create your dialer interface, then configure your atm interface with the right encapsulation and attach your dialer to the ATM interface:
no ip address
encapsulation Encap_type ppp dialer
dialer pool-member 1
+ other ATM specific parameters under the ATM interface
Let's follow the documentation for now and keep me posted please.
PS: Please don't forget to rate and select as validated answer if this answered your question
Thank you Francesco , my ISP settings are : PTM with 802.1q (VLAN-835) MTU 1400 and encapsulation PPOE. with ATM interface i can sync with DSLAM, I take a VDSL controller UP but
Daemon Status N/A
and i can not take a public IP from ISP.
The problem is that i don't know how to make a VLAN 835 and ''connect'' this VLAN with ATM interface.
ATM didn't take a 802.1q encap[ATM sub interface maybe?].