What is SACHET, the alert system that India will use from now in emergencies?

India formally launched SACHET, its integrated disaster and emergency alert platform, in conjunction with the rollout of a nationwide indigenous Cell Broadca...

What Happened

India formally launched SACHET, its integrated disaster and emergency alert platform, in conjunction with the rollout of a nationwide indigenous Cell Broadcast System (CBS) on May 2, 2026.
The system enables authorities to push geo-targeted emergency alerts to all mobile handsets within a defined geographic area simultaneously — no app, subscription, or internet connection required.
A nationwide test alert was sent to mobile devices across capital cities and Delhi-NCR, with messages delivered in English, Hindi, and regional languages.
The CBS overrides silent and Do Not Disturb modes, triggering a loud siren, vibration, and on-screen pop-up — making it impossible for recipients to miss.
The Cell Broadcast technology was developed indigenously by the Centre for Development of Telematics (C-DOT) under the Department of Telecommunications, in close collaboration with the National Disaster Management Authority (NDMA) and the Ministry of Home Affairs.

Static Topic Bridges

National Disaster Management Authority (NDMA)

The NDMA is the apex body for disaster management in India, established under the Disaster Management Act, 2005. It is chaired by the Prime Minister and is responsible for laying down policies, plans, and guidelines for disaster management. The NDMA coordinates the national response framework and works with state agencies, scientific bodies, and security forces to build preparedness and response capability.

Established under the Disaster Management Act, 2005
Chaired by the Prime Minister of India; includes up to nine other members
Responsible for approving the National Disaster Management Plan
Works through the National Executive Committee (NEC) and State Disaster Management Authorities (SDMAs)

Connection to this news: NDMA collaborated with C-DOT and the Ministry of Home Affairs to develop and integrate the Cell Broadcast System into the SACHET platform, strengthening India's real-time alert capability for natural and man-made disasters.

Cell Broadcast System (CBS) — Technology and How It Works

Cell Broadcast is a one-to-many messaging technology that transmits short alerts simultaneously to all mobile devices within a defined geographic cell tower area. Unlike traditional SMS, which is a point-to-point system, CBS is location-based and does not require phone numbers or user data. It is highly resilient to network congestion — a critical advantage during disasters when voice and data networks are typically overloaded.

Delivers messages simultaneously to all handsets in a geographic area within seconds
Works on 4G, 3G, and 2G networks; does not require internet or app installation
Supports multiple languages including regional languages
Over 30 countries have deployed CBS, including Japan (J-Alert, first deployed 2007) and the USA (Wireless Emergency Alerts)
Messages are geo-targeted, meaning only affected areas receive alerts, preventing panic elsewhere

Connection to this news: India's CBS, developed indigenously by C-DOT, is now integrated with the SACHET platform. This allows standardised alerts (using the Common Alerting Protocol, or CAP) to be issued for tsunamis, earthquakes, cyclones, gas leaks, and other emergencies in near real-time.

SACHET Platform and Common Alerting Protocol (CAP)

SACHET (System for Advisories, Cyclone and Hurricane Emergency Transmission) is India's centralised warning dissemination platform operated by NDMA. It is built on the globally recognised Common Alerting Protocol (CAP), an international standard for emergency alerting that enables interoperability between different alert systems and agencies. CAP allows a single alert message to be distributed simultaneously across multiple communication channels — SMS, broadcast, sirens, and now cell broadcast.

CAP is an open, XML-based data format endorsed by ITU and WMO
SACHET aggregates alerts from multiple agencies: IMD, INCOIS, NDMA, and state governments
Integration with CBS means the same CAP message now reaches mobile handsets in near real-time
Previously, SACHET delivered alerts primarily via SMS, which faces congestion issues during peak emergency periods

Connection to this news: The CBS launch strengthens SACHET's last-mile reach by adding a congestion-resistant, privacy-neutral channel to the existing SMS-based system, significantly reducing alert latency in critical situations.

C-DOT and India's Indigenous Telecom R&D

The Centre for Development of Telematics (C-DOT) is India's premier government-owned telecom R&D organisation, established in 1984 with an initial mandate of building indigenous digital switching systems. It operates under the Department of Telecommunications (DoT) and has evolved into a full-spectrum telecom technology institution working on 5G, AI, IoT, optical communications, and network security.

Established August 24, 1984; conceived by Sam Pitroda as an autonomous R&D body
Original mandate: develop rural exchanges (RAX, SBM, MAX) to replace imported telecom equipment
Now works on 5G, cybersecurity, satellite communications, and public safety technologies
Holds CMMI Level 5 certification — the highest process maturity standard for software organisations

Connection to this news: C-DOT's indigenous development of the Cell Broadcast System is a significant demonstration of India's self-reliance (Atmanirbhar Bharat) in critical communication infrastructure, eliminating dependence on foreign vendors for a system of national security importance.

Key Facts & Data

Launch date: May 2, 2026
Coverage: All 36 States and Union Territories of India
Technology: Cell Broadcast System (CBS), integrated with SACHET via Common Alerting Protocol (CAP)
Developer: C-DOT (Department of Telecommunications), in collaboration with NDMA and Ministry of Home Affairs
Test message: "India launches Cell Broadcast using indigenous technology, for instant disaster alerting service for its citizens."
CBS has already been deployed in Andhra Pradesh, Odisha, and Uttarakhand, and during the Char Dham Yatra
India joins over 30 countries, including Japan and the USA, in deploying nationwide CBS
CBS does not require phone numbers, user registration, apps, or internet connectivity
Alerts override silent/DND mode and are delivered in English, Hindi, and regional languages