Call box
A call box or callbox is a box, usually metal, containing a special-purpose direct line telephone or other telecommunications device which has been used by various industries and institutions as a way for employees or clients at a remote location to contact a central dispatch office. == Uses == === Police and taxicab dispatching === Some taxi companies used callboxes before the introduction of two-way radio dispatching as a way for drivers to report to the dispatch office and receive customer requests for service.