I’ve read a few webpages and watched a few videos on the Pro being wired to Nutone
This one looks like to have the best explanation.
https://www.youtube.com/watch?v=4ZFl6BRTQnA&t=4s
However, I have a Samsung video intercom system.
Wiring Diagram in the link below
https://www.manualslib.com/manual/890172/Samsung-Cctv-Sdv-410y.html#manual
Picture of the transformer - The output voltage is DC 
https://imgur.com/a/bgSNIE0
- Is this a case where a workaround does not exist like the one shown in the video?
- My home is hard wired for multiple chimes (currently 2 Samsung monitoring units). Can I replace them with something similar that would allow me to hear the chimes in two locations. I’ll be replacing splicing off the old DC transformers and replacing them with AC units.