callbox

UK: /ˈkɔːlbɒks/

WordReference Random House Unabridged Dictionary of American English © 2025

call′ box′, 

1. Telecommunications an outdoor telephone or signal box for calling the police or fire department.
2. Telecommunications, British Terms [Brit.] a public telephone booth.
3. a post-office box for mail that can be picked up only by a renter in person.
• 1880–85

Collins Concise English Dictionary © HarperCollins Publishers::

call box noun

1. a soundproof enclosure for a public telephone
   Also called: telephone kiosk