Callbox

Callboxes are found in the lobbies of all penthouses in The Sims 3: Late Night. Visitors to the lot will stop by the callbox and buzz the household living there, asking for permission to enter. The residents of the household may choose to accept the visitor, greet them in person, or simply ignore the request. A callbox may be crucial for penthouses, as visiting Sims cannot use elevators within the shell to access any or unit-containing floors.

Although specifically intented for penthouses, this object function just as well in any normal residential houses. Call boxes are even available in the buy mode section of community lots, despite lacking any necessary application.