@Wayne-TP I tested all the built‑in messages and some custom‑made ones, nothing works. I tried 1s/5s/15s delays, no luck.

@Wayne-TP Thanks for the info. Yes, I’m talking about the auto‑response. I tried different responses with different delays, but none of them played. By the way, I have two of these D210 units, same...

The D210 Quick Response feature isn't responding automatically, even though I have it set to 'Auto'. I pressed the bell, nothing played.