(a) “Alarm System” means any mechanical or electrical device that is arranged, designed, or used to signal the occurrence in the City of Oakwood of a burglary, robbery, other criminal offense, fire emergency, or medical emergency requiring urgent attention, and to which police, fire, or emergency medical personnel are expected to respond. Alarm systems include those through which Public Safety personnel are notified directly of such signals through automatic recording devices or are notified indirectly by way of third persons who monitor the alarm systems and who report such signals to the Safety Department. Alarm systems also include those designed to register a signal which is so audible, visible, or in other ways perceptible outside a protected building, structure, or facility as to notify persons in the neighborhood beyond the zoning lot where the signal is located, who may in turn notify the Public Safety Department of the signal. Alarm systems do not include those affixed to automobiles. Further, alarm systems do not include auxiliary devices installed by telephone companies to protect telephone equipment or systems which might be damaged or disrupted by the use of an alarm system.