Private Box 1 : (1) A fire alarm box on private property that is connected to the public fire alarm system but is not usually accessible to the public. (2) An alarm or call box on a proprietary alarm system
Ralph W. Burklin & Robert G. Purington, Fire Terms: A Guide to Their Meaning and Use, National Protection Association, Boston, MA 1980 USA. (Guide: Meaning and Use, Nat Prot Association Fr Srvc - Amer) {457}