Abstract: Devices, systems, and methods for event device system operation are described herein. In some examples, one or more embodiments include a controller comprising a memory and a processor to execute instructions stored in the memory to transmit, to a plurality of event devices via a power line communications (PLC) protocol, a synchronization message according to a predetermined schedule to cause the plurality of event devices to synchronize timing of the plurality of event devices with the controller, transmit, to the plurality of event devices via the PLC protocol, a command according to the predetermined schedule, and receive, from the plurality of event devices via the PLC protocol, a response to the command according to the predetermined schedule.

Abstract: Systems and methods of voice annunciation of signal strength, quality of service, and sensor status for wireless devices are provided. Some methods can include determining a signal strength or range of a radio, determining quality of service events and statistics for a wireless device, or determining a status of a sensor and then verbally annunciating information or instructions relating to the determined signal strength or range, the determined quality of service events and statistics, or the determined sensor status.

Abstract: Systems and methods of voice annunciation of signal strength, quality of service, and sensor status for wireless devices are provided. Some methods can include determining a signal strength or range of a radio, determining quality of service events and statistics for a wireless device, or determining a status of a sensor and then verbally annunciating information or instructions relating to the determined signal strength or range, the determined quality of service events and statistics, or the determined sensor status.

Abstract: A fire detecting system can mix fire detectors, such as smoke, flame, or, thermal detectors on a common loop, or zone, with gas detectors. Signals indicative of gas can have one amplitude while those indicating fire can have a different amplitude. Duty cycles can be varied to indicate other conditions, such as trouble conditions.

Abstract: A fire detecting system can mix fire detectors, such as smoke, flame, or, thermal detectors on a common loop, or zone, with gas detectors. Signals indicative of gas can have one amplitude while those indicating fire can have a different amplitude. Duty cycles can be varied to indicate other conditions, such as trouble conditions.