Anyone know if either of the Icom data jacks can be used to work with the URIx successfully for a simplex node?

Documentation notes this:

DATA IN - Input terminal for data (common for both 1200 and 9600 bps)
GND - Ground line for the DATA IN, DATA OUT and AF OUT.
PTTP - Transmits when this terminal is grounded.
DATA OUT - Received data output terminal for 9600 bps operation.
AF OUT - Received data output terminal for 1200 bps operation.
SQL - Output terminal for squelch condition (Open/Close). Outputs grounded level signal
when squelch is opened, +8 V level signal when squelch is closed.

I wired it up but not getting tx audio or rx audio to work. Tried using SQL with the URI COR_DET line. Maybe that's inverted here...

Anyone have luck using this kind of data port to do the interfacing?

thanks!