Switchboard (noun)

1. A board with a set of switches used to control and direct electrical circuits.
2. A central telephone exchange which directs calls to the intended destination.

Origin:

The word switchboard comes from the combination of two words switch and board, it has been used in the english language since the late 19th century.

Examples:

1. The electrician checked the switchboard for any damage.
2. The operator sat at the switchboard directing calls.
3. The switchboard was outdated and needed to be replaced.
4. The switchboard was used to control the power distribution in the building.
5. The switchboard was overloaded with calls during the emergency.