Problems connecting Ring Intercom to Tegui T-72C

I am trying to connect using the wiring instructions by the ring app for this particular model of intercom but I am unable to pass the ring test. I am in touch with someone from support but no clues for now.
The Tegui T-72C is a 2 wire digital intercom system. I will provide updates to this thread to document my progress.

Hi, have you managed to resolve this issue? I have the same model and after following the app instructions, the device enters test mode for a few seconds before going back to the blue light and showing unable to perform the test.

Any update? Im on the same situarion

Hi @user58596 Thank you for reaching out to us. Could you please share with us the current pictures of your wiring?