Ring Intercom doesn't work on CAME BPT Opale - Ring Intercom - Ring Community

I’m pretty confident that I’ve correctly wired Ring Intercom to the bus CAME BPT Opale White system, which is listed on Ring’s site as compatible. I’ve read the intercom schematic and tried a few different combinations, and other people have had success with B1/B2 into each of the two “B” Bus ports. However, when testing, the Ring device is never able to answer the call from our intercom. It does try to respond - you can tell because the screen flashes when Ring Intercom communicates with our

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Door Entry Systems & Intercoms, Home Security, Home, Furniture & DIY - PicClick UK

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Ring Intercom - Ring Community

Door Entry Systems & Intercoms, Home Security, Home, Furniture & DIY - PicClick UK

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Ring Intercom not working with Came BPT YC/300A - Ring Intercom - Ring Community

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Connessioni Magazine - #12 (Feb/Mar 2013) by Connessioni Srl - Issuu

Does anyone understand these connections and how they would work with Ring intercom please! : r/Ring