I just purchased a ATT 5268AC modem, an I would like to know if it is possible to configure it to work with Sonic DSL.
I found a user guide for the 5268ac online and it may be able to help you connect. https://www.dslreports.com/r0/download/ ... Manual.pdf
If you can get the modem to connect over ATM or PTM and not PPOE then it should work. It's possible that because it's an AT&T branded modem that it's hard locked to connecting over PPOE and if that's the case then it would not work on our network.