Hi Dave,
The PSL port is a PCH device that is an LVDS over RS-485. There was not really something generically available to do this so we did make a "gearlite" like device that put the Carbonite Black Panel Ethernet (ePCH) into a box to allow the older panels to talk to any frame over IP like the Black Panels.
https://help.rossvideo.com/carbonite-01/Topics/Setup/ePCH/ePCH.html
That explains the product. It would provide for you the connectivity you are looking for.
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Les O'Reilly
Director - Switcher Product Management
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