The disastrous Japanese earthquake and tsunami showed how a comprehensive warning system — combining radio broadcasts, text messages, sirens and firefighters' door-to-door calls — can save thousands of lives. Every business needs an effective emergency communications notification system that includes both low‑tech and high‑tech elements.
Types of emergency notification systems
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Low-tech systems
Low‑tech measures can be effective but have clear limitations. Calling trees are useful for mass communications but are slow and prone to errors or breakdowns.
Sirens and alarms give immediate warning to people in an area, though they convey little detail and have limited range. Intercom systems can share detailed information quickly but usually cover only a single building.
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High-tech systems
High‑tech systems can automate rapid mass notification to phones and computers through multiple networks and can target messages to groups such as first responders.
These systems are not foolproof: cell phones may be turned off, networks can be overloaded or experience outages, and "call capacity" can limit reach during major incidents.
For most businesses, a blended approach — alarms and sirens for immediate warning plus automated notification for detailed, targeted instructions — provides the most effective coverage.
When choosing a system, weigh factors such as cost, ease of use, and the physical infrastructure you already have in place; for example, upgrading cabling or network routing may be part of a broader facilities plan. Learn more about Insurance for Structured Cabling Systems to understand how infrastructure investments relate to risk management.
If your organization uses services that contact large numbers of people, consider systems built for mass automated calls and confirmations; see Insurance for One-Call Systems for examples of how those services are evaluated from a risk perspective.
Our risk management experts would be happy to offer you their advice — talk to an agent.
Frequently Asked Questions
What devices should a business include in its notification plan?
Include multiple channels: wired and wireless phones, SMS/text messaging, email, public-address systems, and on-site alarms to ensure redundancy.
How often should notification systems be tested?
Test systems at least quarterly and after any infrastructure change to verify contact lists, delivery, and escalation procedures.
What if cellular networks are overloaded during an emergency?
Use multiple channels (landlines, email, public address, and in-person notifications) and pre-planned failover procedures to reduce reliance on a single network.
Who should be included in targeted messages?
Include building occupants, managers, safety teams, IT staff, and first responders as appropriate to the incident and your response plan.