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The earliest methods of sounding an alarm would typically be by ringing a bell either at the fire station or the local church. As electricity became available, most fire departments used fire sirens or whistles to summon volunteers (many fire departments still use outdoor sirens and horns along with pagers to alert volunteers). Other methods ...
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The popularity of fire sirens took off by the 1920s, with many manufacturers including the Federal Electric Company and Decot Machine Works creating their own sirens. Since the 1970s, many communities have since deactivated their fire sirens as pagers became available for fire department use. Some sirens still remain as a backup to pager systems.
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The standard fire alarm sound used in most of North America [citation needed]. Coding refers to the pattern or tones a notification appliance sounds in and is controlled either by the panel or by setting jumpers or DIP switches on the notification appliances. The majority of audible notification appliances installed prior to 1996 produced a ...
These pagers receive a special tone from a fire department radio frequency. A restaurant pager alerting customers to collect their order. Restaurant pagers remain in wide use since the 2000s. Customers are given a portable receiver that would usually vibrate, flash, or beep when a table becomes free or when their meal is ready. [19]
These sirens can also be tied into other networks such as a fire department's volunteer notification/paging system. The basics of this type of installation would consist of a device (possibly the same pager the firefighters have) connected to the controller/timer system of the siren. When a page is received, the siren is activated. [3]
Some fire departments used this feature to implement an individual signal (using the first of the four signals), a station based signal (i.e. paging everyone from one fire station, using the second signal), a region-based signal (i.e., everyone in the northwest region, using the third signal), and an all-call (every fireman, using the fourth ...
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