Alert & Protect Those Inside
When emergencies strike, timely and clear communication is critical. Indoor warning systems help protect lives by delivering immediate alerts inside hospitals, schools, workplaces, and other large indoor facilities and spaces. These systems effectively warn occupants of severe weather, active shooters, hazardous spills, and other emergencies, allowing people to take immediate action to stay safe.
OmniWarn specializes in designing, installing, and maintaining cutting-edge indoor warning systems. Our solutions provide superior audio clarity and seamless integration with other emergency alert platforms, giving you confidence in your safety communications. Whether you need a new system installation or upgrades to an existing warning system, OmniWarn provides end-to-end mass notification solutions. Contact us today to discuss a custom warning system design for your area.


Benefits of Indoor Warning Systems
Indoor warning systems offer a reliable and efficient way to communicate urgent messages inside buildings. During emergencies like severe weather or security threats, indoor warning systems can send messages to evacuate, go to a designated shelter, or take other action.
- Clear Communication in Emergencies: High-quality speakers and voice clarity make sure messages are heard and understood, even in noisy environments.
- Customizable Alerts: Tailor messages for specific emergencies, including weather warnings, intruder alerts, and hazardous spills.
- Regulatory Compliance: Meet safety regulations and industry standards for emergency preparedness.
- Faster Emergency Response: Reduce panic and improve reaction times with immediate alerts.
- Seamless Integration: You can integrate indoor warning sirens with other emergency notification platforms, such as SMS alerts, emails, digital signage, and social media updates, to create a comprehensive alerting strategy.
Indoor Warning Systems & Speakers

Federal Signal Informer IP Enabled
The Federal Signal Informer-IP Series C is a versatile IP-enabled communication device designed for hospitals, schools, and industrial facilities. It functions as both a warning system and a two-way intercom, offering multiple communication options.
Key Features
- Two-way communication with live voice, text-to-speech, and pre-recorded messages
- 80 dB internal speaker (10 ft. range) for clear, audible alerts
- Stores up to 4,000 tones and voice messages
- Panic button for emergency initiation
- Desk or wall mount options for flexible installation
- Full product details

Federal Signal Informer15
The Informer15 Speaker is a high-powered, IP-enabled alert system ideal for both indoor and outdoor use. It provides visual and audible emergency notifications in hazardous environments and integrates with external devices like strobes and digital message boards.
Key Features
- 112 dB audible output (tones) and 107 dB (pink noise) at 10 feet
- LED visual alerting system with customizable flash patterns
- Remote volume control and noise-level adjustments
- Compatible with video security systems
- Designed for industrial plants, food processing facilities, and other high-noise environments
- Full product details

Federal Signal UltraVoice
The Federal Signal UltraVoice line integrates with PA and fire alarm systems to enhance emergency communication. These systems deliver clear warning tones and voice messages for critical situations.
Key Features
- Seven built-in standard warning signals
- Up to eight controller zones for targeted alerts
- Two-way communication option
- Generates and amplifies single or dual-frequency warning tones
- Full product details
Indoor Warning Solutions
Indoor warning systems protect communities by delivering clear, audible alerts and warnings in hazardous situations. They are a key element of comprehensive mass notification systems.
Industries We Serve Most
Even if your specific industry isn’t listed, we encourage you to reach out. We specialize in designing tailored indoor warning systems and comprehensive mass notification alert systems for diverse applications. Our expertise includes integrating crucial components for effective indoor communication during emergencies. We’ll work closely with you to understand your unique needs and develop a customized indoor warning system that meets your precise specifications, focusing on clear and reliable internal alerts.



Mass Notification Solutions from OmniWarn
Ensure the safety and awareness of those within your facilities with OmniWarn’s dependable indoor warning solutions. We provide a comprehensive suite of products and services, including indoor warning alerts, giant voice speakers configured for internal use, and complete alert systems specifically designed to safeguard your indoor environment.
Sirens & Systems
Warning System Services


OmniWarn Is Factory Direct
Federal Signal Provider
OmniWarn, a certified factory-direct provider of Federal Signal products in Oklahoma, Texas, Arkansas, New Mexico, Arizona, and Louisiana, delivers a full range of services to protect your community. These services encompass direct-from-factory pricing for emergency warning systems, professional advice on system selection and setup, sustained maintenance contracts to ensure sirens remain functional, and budget-friendly purchasing choices, all contributing to dependable and effective mass notification systems.
Frequently Asked Questions
What is an indoor warning system and why is it important?
An indoor warning system is a network of speakers, alarms, and communication devices designed to alert people inside buildings about emergencies. OmniWarn’s systems deliver instant notifications for severe weather, security threats, hazardous material spills, and other critical events. They are essential for hospitals, schools, offices, and industrial facilities to protect occupants and improve response times during emergencies.
How do indoor warning systems work with other emergency notification platforms?
Indoor warning systems can be fully integrated with outdoor sirens, SMS alerts, emails, digital signage, and social media platforms. This multi-channel approach ensures that everyone receives timely alerts, reducing confusion and improving the speed of emergency responses.
What types of messages and alerts can indoor warning systems deliver?
OmniWarn indoor warning systems can broadcast:
- Live voice messages through two-way communication
- Pre-recorded emergency instructions
- Text-to-speech alerts
- Visual notifications with LED strobes or digital displays
Alerts can be customized for specific situations, including severe weather, intruders, hazardous spills, and fire emergencies.
Which indoor warning system models does OmniWarn provide?
OmniWarn installs multiple Federal Signal indoor warning system models, including:
- Informer-IP: IP-enabled device with two-way communication, panic button, and up to 4,000 stored messages.
- Informer15: High-powered system for industrial or high-noise environments, featuring LED alerts and remote volume control.
- UltraVoice: Integrates with PA and fire alarm systems for clear warning tones and voice messages, with multiple controller zones.
What industries and facilities benefit from indoor warning systems?
Indoor warning systems are vital for any organization that needs to protect people inside buildings. Common applications include:
- Hospitals and medical facilities
- Schools, colleges, and universities
- Industrial plants and manufacturing facilities
- Government buildings and military bases
- Parks, recreation centers, and event venues
OmniWarn custom designs systems to meet the unique needs of each facility, ensuring maximum safety and compliance with regulatory standards.