Golmar T-810 doorbell doesn't work with Opener

I am trying to install the Opener with the Golmar T-810 (I think). I don’t see any model numbers anywhere on the outside or inside of the phone…including on the circuit board. A Google photo search of the phone brings up the T-810.

I followed the instructions and was able to get the app to unlock the door but ringing the doorbell does nothing. No sound from the phone or connection to the Opener.

If I put my ear to the the intercom outside I can hear a very low static. This is making me think a wire is in the wrong place or there is a bad connection somewhere.

Thanks in advance.

This is the original wiring.