I was wondering if such a plugin or even a docker was available that acts like a voip intercom that can be used very simply with a tablet or raspberry client?

 

I have seen teamspeak and mumble but wanted something super simple.

 

Example tablet in kitchen with nice app/web gui can press a button and sends voice message to another tablet client in loft room

 

 

Im looking for something like this as well, this and SIP support would be perfect! Skype for business could work but not on raspberry pi and i don't want to set up an active domain. A software that can do this and is free and open source would be even better. I already searched for something like this but couldn't find any software that can do what we need without being extremely expensive and confusing.

Could be wrong but I'm guessing a docker or vm containing asterisk + having whatever softphone app for tablets would give you an intercom.

I am trying to build one. but some people might find deploying incredible pbx or similar (on a pi  or as a VM) to be enough - might go that way if I get over some of my pride ...