Thanks for using the ADTRAN Support Forums.
Unfortunately, there is not a DC version of the TA 900/e series. The NetVanta 6250 can do the same thing as the TA 900 and has a DC version and comes in 8, 16, and 24 FXS flavors.
Let me know if you need more information.
You will pop the internal fuse/resistor and MOV surge suppressors if you exceed 120 volts. It's happened to us in data centers with 3-phase PDUs. This can be repaired. https://supportforums.adtran.com/message/16498#16498
You can power any of them with -48VDC using the backup battery port. 3-pin Molex connector.