intercom systems were pretty ubiquitous in the 90's and 00's...
House I used to rent had intercom in every room and CD player that plays in whole house via those intercomes. It didn't work, but i but in early 00s that was major reason to brag.
alt Hacker News
House I used to rent had intercom in every room and CD player that plays in whole house via those intercomes. It didn't work, but i but in early 00s that was major reason to brag.