Okuma OSP3000 & Okuma DTE (data tape emulator)

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)

The PTR is a parallel interface (proprietary) and there appears to be no serial interface on the OSP3000, or the one I had did not have the option.
Attached are circuits for an interface i designed, but I never got around to writing the firmware for it.
The interface was also to be used as a data analyzer to figure out how it works.
Stage one. Snoop data while reading a tape.
Stage two. Fake being a paper tape.
Stage three. Get a full blown PC parallel port interface to work.
You are welcome to the circuits. No good to me now.
I can sell you a paper tape punch and some rolls of paper though.:D
This was 8 years ago.

Both the circuits are the same, but the A3 one is more readable.

design with optical decoupling ir too heavy, in my opinion. No need to dig into parallel interface. Serial date sequence is present inside every paper tape rader.
there are OSP 3000 equipped with regular serial interface too