Any one familiar with the Okuma DTE from the 80's?

My 1980 LC10 with OSP3000 has one, and I am using Easy Talk Plus 6.53 to send programs to the control from a PC with it via a DB25 cable (straight cable - extension cable of sorts - pins 1-1, 2-2, 3-3, etc... no switch overs)

I can find nothing on it, or the wires used for communication,handshake, etc...

Im wanting to change things around with addition of the Fadal to the shop, and hopefully, set the cabling for the Okuma up more like that of the Fadal (using DB25 to RJ45 adapters and the cable runs using Cat5e cable with RJ45 ends)

But not knowing how many of the 25 wires in the current cable are being used, or their purpose, I dont know if this is even possible, and cant find documentation on the Okuma DTE.

Hoping someone might have some ideas or experience with this setup.

Thanks
Wade

(also posted on the PM Forums)