The method of alerting fire department members of an emergency alerts the member by tone, light, and/or vibration and can be sent to specific frequencies is called Pagers method.
A pager is a wireless communication device that receives and displays audio or alphanumeric messages. It is often referred to as a beeper or bleeper. Response pagers and two-way pagers may also acknowledge, reply to, and create messages using an internal transmitter, in contrast to one-way pagers that can only receive messages.
In order to inform or warn a user about an event, pagers are electronic communications tools. They employ various emergency alerts or notification mechanisms, such as beeping, vibrating, flashing, displaying text, and so on.
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