This works with Dsnake if you’re using one of the Allen and Heath boxes that are also made for the GLD.
Let’s clear that up bit. The pictured box is not a digital stage box it is merely a pin to sub snake using shielded CAT 5 or 6 as a means of a copper connection.
dSnake is a protocol by A&H, you are correct the box pictured is just an adapter, there is nothing digital about that box.
You can use the AR2412, AR84 or the SB168 originally designed for the GLD but made compatible with the newer consoles also.