Fire detection, monitoring and alarm systems comprised of fire alarm control panels, fire detectors, smoke detectors, electronic smoke sensors, electronic heat sensors, flame detectors, water flow switches for monitoring and controlling the flow of water, sprinkler supervisory switches being parts of fire sprinklers, electronically-operated door latches, computer network adapters, computer network switchers, computer network routers, computer network hubs, modems, fiber optic line drivers, electronic alarm communicator transmitters and receivers, remote station audio and video receivers, audible and visible notification appliances, electrical annunciators, and net multiplexers; voice communication and fire alarm emergency phone systems comprised of telecommunications hardware, namely, devices for transporting and aggregating voice communications across multiple network infrastructures and communications protocols; graphical command centers comprising computer hardware, software, video displays and mobile devices, namely, tablet computers and wireless phones, and power supplies for the operation, monitoring, and networking of fire and security systems; document printers, batteries and battery chargers, transient voltage surge suppressors; sound and communication systems accessories, namely, audio transmitters and intercoms