telephone exchange

English dictionary entry

Meanings

noun

Any equipment that establishes connections between telephones.
The rooms or building housing such equipment (a central office, as it was termed by the Bell System).
A local or locoregional network of such switched connections, of which a central office was the hub; the local company formed to create and maintain this network and its central office.
The portion of a telephone number representing that network, among the other networks of the larger system: the central office code. In the North American Numbering Plan, this is the "555" portion of "+1-212-555-6789".

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telephone exchange telephone exchanges

area code dialling code country code Strowger switch switchboard telco telephone operator

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