Ajax Alarmsystems (or others) in Home Assistant

hey all,

I know this is not the first post about the possibility to integrate Ajax in Home Assistant, but with al the posts that are written and hacks made in the last couple of years, I'm not sure what works and doesnt work anymore.

Is it anno 2026 possible to integrate an Ajax Alarmsystem in Home Assistant locally without the cloud? I wanted to use the SIA prtocol, but then I can't connect with a controlroom anymore.

If not so, do you guys know of an alarmsystem that integrates with home assistant locally and simultaneously can connect to a controlroom?

Thanks in advance!