I’ve used to live in an inter generational big house (Italians am I right… even if we are not actually born there we still have spaghetti dna). Anyway I’ve setup one very lightweight asterix instance of statically defined accounts. A few cheap voip phones were installed through the house plus soft phones on personal smartphones.

It was supposed to make things more convenient. Supposed to, because we just kept yelling to convey messages. When I’ve moved out I’ve dismantled the system since I wouldn’t be there to keep it maintained.