Direct Exterior Window : A window in a communications center that faces an area that is not part of the secure area assigned solely to the communications center or that is accessible to the public
NFPA 1221 Standard for the Installation, Maintenance, and Use of Emergency Services Communications Systems, 2007 ed. (Std: Install, Maint, and Use of Emr Srvc Commun - Amer) {391 NFC}