Hi all,
We've recently installed the R29 door phone for our customers and connected its relay with the main door and mailbox, allowing them to effortlessly control both.

Currently, the system works perfectly for villa projects, where there's typically only one mailbox, and the relay number is sufficient for this setup.

But, when it comes to apartment projects with multiple mailboxes, we face the issue of limited relay availability.

So, I'd love to hear your thoughts and solutions which can solve the relay limitation problem.
If you have any ideas or suggestions on how to efficiently control many mailboxes in apartment buildings, please feel free to share them.