/ ˈswɪtʃbɔːd; NAmE -bɔːrd/ noun
the central part of a telephone system used by a company, etc., where telephone calls are answered and put through (= connected) to the appropriate person or department; the people who work this equipment :
a switchboard operator
Call the switchboard and ask for extension 410.
Hundreds of fans jammed the switchboard for over an hour.