I’m using a PortServer TS 4 H MEI and I bought one Digi cable (part number 76000645) for testing. The testing was successful but I need to make custom cables for the application. The pinout of the actual Digi cable doesn’t agree with the Digi documentation though. Looks like the two grounds were swapped at some point? The Digi docs say frame ground is pin 4 on the cable’s RJ45 connector but the shell is wired to pin 7 on the RJ45.
My mistake. I was numbering the RJ45 from the wrong side which has the effect of making it look like a DCE with signal ground and chassis ground reversed.