I know this was already brought up and closed, but I'd like to bring it back to light because it seems crazy that the Media Server does not support T.38.

With Avaya moving to software based DSPs, and offering the Avaya Media Server as a suitable replacement, I am shocked to learn that it doesn't support T.38 faxing. I would strongly suggest they work on getting T.38 support on the next release of Avaya Media Server to make it more future proof.