Repeating from another thread.
From my supplier:
"I just received a message from Devialet that the new Ultimate 108 customer version doesn’t have an optical-only mode. You would need the custom version of the Phantoms which isn’t available in the Ultimate until next year. If it's to go onto a Dante system, you either need to buy the legacy version of the Phantom 1 or wait until the custom version of the Ultimate comes out. This will likely be Q3 next year."
From my supplier:
"I just received a message from Devialet that the new Ultimate 108 customer version doesn’t have an optical-only mode. You would need the custom version of the Phantoms which isn’t available in the Ultimate until next year. If it's to go onto a Dante system, you either need to buy the legacy version of the Phantom 1 or wait until the custom version of the Ultimate comes out. This will likely be Q3 next year."

