Examine the role of NDMA and DoT in building a layered public alerting architecture in India, with reference to SACHET and CBS.

India's disaster response has shifted from reactive to proactive with the launch of the Cell Broadcast System (CBS) on 2 May 2026 — the culmination of a layered public-alerting architecture jointly built by NDMA and DoT through their complementary mandates of policy and technology [1].

NDMA — the alert-governance backbone

• Operationalises the Disaster Management Act, 2005: frames alerting policy, and authorises/triggers warnings through SDMAs [1].
• Built and runs SACHET, the CAP-based Integrated Alert System, disseminating geo-targeted vernacular alerts [4].
• Co-developed CBS with C-DOT under MHA guidance, extending coverage to natural and man-made emergencies [1].

DoT / C-DOT — the technology enabler

• C-DOT indigenously developed CBS, a one-to-many broadcast channel reaching every handset instantly, needing no app or internet [2].
• Conducted phased pan-India testing across all telecom operators before the launch [2].
• Ensures ITU-recommended CAP compliance for cross-operator interoperability [3].

The layered architecture — SACHET + CBS

• SMS layer (SACHET): over 134 billion alerts in 19+ languages — wide reach, but slower and congestion-prone [3].
• Broadcast layer (CBS): geo-targeted, instant, congestion-immune push.
• As redundant, complementary layers they close the last-mile gap exposed in the 2018 Kerala floods and Cyclone Tauktae [2].

This NDMA–DoT synergy — policy paired with indigenous, Atmanirbhar technology — marks a decisive move toward proactive disaster governance, aligning with the Sendai Framework's early-warning goal. Scaling it with regular drills and CBRN readiness can make India a global alerting template.