The Cables to Go USB to Serial DB9 SuperBooster Wall Plate essentially takes a serial (in HT terms RS-232) signal and converts it to USB. I'm used to getting strange boxes in the mail… it happens all ...
We use the Raritan KSX serial "KVM". It works well enough, although we did have a problem initially with cables for devices that use an RJ-45 connector rather than DB-9 (like that for the NetApp).