DoT, NDMA Launch Testing of Real-Time Cell Broadcast Emergency Alerts

The system has been indigenously developed by C-DOT, reinforcing India’s push for self-reliant, secure communication infrastructure.

In a major step towards strengthening India's disaster preparedness and public safety infrastructure, the Department of Telecommunications (DoT), in collaboration with the National Disaster Management Authority (NDMA), has initiated nationwide testing of an advanced mobile-based alert system using Cell Broadcast (CB) technology. The initiative aims to ensure rapid, reliable, and location-specific dissemination of emergency alerts to millions of citizens across the country.

The move builds upon the success of the Integrated Alert System 'SACHET', a robust platform developed by the Centre for Development of Telematics (C-DOT), the premier R&D institution under DoT. Operational across all 36 States and Union Territories, SACHET currently delivers geo-targeted disaster alerts via SMS, based on the globally recognised Common Alerting Protocol (CAP) recommended by the International Telecommunication Union (ITU).

134 Billion Alerts and Counting: Scaling India's Disaster Communication

India's alerting infrastructure has already demonstrated significant reach and impact. According to official data, over 134 billion SMS alerts have been disseminated so far in more than 19 Indian languages, covering critical events such as cyclones, extreme weather warnings, and other natural disasters. These alerts have played a vital role in reducing loss of life and improving preparedness at the grassroots level.

However, authorities note that SMS-based alerts, while effective, can face delays during network congestion—especially during large-scale emergencies. To address this challenge, the government is now integrating Cell Broadcast technology, which allows messages to be transmitted simultaneously to all mobile devices within a defined geographic area.

What Makes Cell Broadcast a Game-Changer

Unlike traditional SMS, Cell Broadcast does not rely on individual message delivery. Instead, it sends alerts directly through mobile network towers to all compatible devices in a target zone—ensuring near-instantaneous communication even during peak network usage.

This makes CB particularly critical for time-sensitive emergencies, including:

• Tsunamis and earthquakes

• Lightning strikes

• Industrial accidents such as gas leaks or chemical hazards

• Sudden extreme weather events

The system has been indigenously developed by C-DOT, reinforcing India's push for self-reliant, secure communication infrastructure.

Nationwide Testing Underway

As part of the rollout, extensive testing and trials are currently being conducted across India to validate the system's performance, reliability, and network integration. During this phase, citizens may receive test messages on their mobile phones in English, Hindi, and regional languages.

These messages will be received only on devices where Cell Broadcast test alerts are enabled, typically accessible via:

Settings → Safety & Emergency → Wireless Emergency Alerts → Test Alerts

Authorities have clarified that:

• Users may receive multiple test alerts

• These messages are part of a controlled system validation exercise

• No action is required from recipients

Sample Test Message

English:"This is a TEST Cell Broadcast message sent by the National Disaster Management Authority in coordination with the Department of Telecommunications (DoT), Government of India, as part of testing the Cell Broadcast solution for disseminating alerts… Please ignore these message(s); no action is required at your end."

Hindi:"यह एक टेस्ट सेल ब्रॉडकास्ट संदेश है… कृपया इन संदेशों को अनदेखा करें, आपकी ओर से कोई कार्रवाई करने की आवश्यकता नहीं है।"

Towards a Fully Operational National Alert Grid

Once testing is completed, the Cell Broadcast system will be formally launched and integrated into India's national disaster response framework. In its final operational phase, alerts will be transmitted across all mobile handsets, regardless of user settings, ensuring maximum reach and inclusivity.

Officials emphasise that this initiative represents a critical upgrade to India's early warning ecosystem—combining speed, scale, and linguistic diversity to ensure that no citizen is left uninformed during emergencies.

Public Cooperation Key to Success

The Department of Telecommunications has urged citizens to cooperate during the testing phase and not to panic upon receiving test alerts. The initiative is part of a long-term effort to build a resilient, tech-driven disaster communication network capable of saving lives and minimising damage during crises.

With the integration of Cell Broadcast technology, India is moving closer to establishing a real-time, nationwide emergency alert system, aligned with global best practices and tailored to the country's diverse and densely populated landscape.