Ironically, page won't load for me.
How is it a switch if there's no data processing? There needs to be a MAC table and the switch needs to send non-broadcast frames only to the right port. I don't see how it can have that intelligence without converting light to electricity and processing it.
And I'd take it that would mean no SFPs, which means not a very flexible device if all the ports are LC with a fixed wavelength and signal.