The Centre for Development of Telematics (C-DOT) began as a focused answer to a clear problem – to build Indian telecom systems that work in Indian conditions and cut reliance on imports. It was set up in August 1984 as an autonomous telecom research and development (R&D) centre under India’s Department of Telecommunications (DoT), Ministry of Communications.
A major early achievement came just two years later with the launch of the rural automatic exchange (RAX). This digital switch had a 128-line capacity and was first deployed in Karnataka. It was reported to cost roughly one-tenth of comparable imports. That difference meant that connecting rural communities could be an affordable necessity rather than a luxury. These RAX were further upgraded to 256-line capacity to meet higher demands in villages. To address the requirements of small towns, a single base module with a capacity of 2000 subscribers was developed and deployed. Further, the development of higher-capacity platforms like the main automatic exchange (MAX) and MAX-XL enabled the institution to address the growing demand in urban and semi-urban areas. These systems were designed to carry much heavier subscriber loads, offering reliable performance under Indian conditions. RAX/MAX catalysed a new domestic manufacturing ecosystem and made rural/semi-urban connectivity economically viable. The effects rippled outward, saving vast sums in infrastructure costs and enabling import substitution while offering millions access to voice communications for the first time. Meanwhile, the organisation branched into optical transmission technology, wireless local loops, satellite communication and asynchronous transfer mode switching. Each of these milestones was proof that homegrown innovation could tackle everything from rural voice to data transport at par with, or superior to, imported systems.
Fast-forward to today, and the technological footprint is vast. The institution’s optical and gigabit passive optical network systems are the backbone of a nationwide broadband roll-out under BharatNet Phase I. Wireless now includes Wi-Fi 4/5/6 access points/routers, frameworks for public Wi-Fi networks under the national Prime Minister Wi-Fi Access Network Interface initiative, and 4G/5G core and radio technologies. The switching and routing products include 1G to 25 terabit-class switches/routers. C-DOT recently introduced the Saksham-3000, a new series of 400G data centre switch-cum-routers capable of delivering speeds of up to 25.6 terabits per second. Designed to handle surging data traffic, these systems are aimed at enabling operators to support 5G-driven consumption patterns and advanced network virtualisation requirements.
On the software application side, it delivers disaster early warning platforms compliant with the International Telecommunications Union (ITU)-common alerting protocol, which is now operational across all 36 states and union territories. To meet the diverse requirements of the country, this artificial intelligence (AI)-based platform, deployed by the National Disaster Management Agency (NDMA), issues alerts in more than 19 Indian languages for disasters and weather-related events. This technology is being further upgraded soon to 3GPP standards-based cell broadcast system that can disseminate alerts in near real time.
C-DOT has rolled out machine-to-machine and internet of things platforms based on global oneM2M standards, advanced network management systems, SAMVAD (a secure chat and call platform), and CDOTmeet (a secure video conferencing solution), WayFinder (an indoor navigation platform) and many more niche applications. It has also developed various lawful interception technologies that can be deployed by telecom operators and the government.
Collaboration has been central to C-DOT’s evolution, spanning public-private partnerships, advanced technology tie-ups and deep-tech ecosystem outreach. It has funded several start-ups/academic institutions for developing products/solutions under its C-DOT Collaboration Research Program. In early 2024, a strategic MoU was signed with Qualcomm Technologies at the Mobile World Congress under the Make in India agenda, giving start-ups, academia and original equipment manufacturers access to foundational wireless chip technology and commercialisation support.
Parallel to these, the Samarth Incubation Programme, launched with major innovation partners, has cemented the organisation’s role in the start-up ecosystem. Through this, 18 promising early-stage ventures gained funding, lab access, office space and mentorship. The second cohort has since been launched with a focus on AI, unmanned aerial vehicles, cybersecurity, Li-Fi and blockchain. The NIDHI programme was launched, with 10 women-led start-ups funded under the program. A consortium, led by Tata Consultancy Services with Tejas Networks and C-DOT as partners, is establishing 4G/5G data centres and rolling out a commercial 4G network for Bharat Sanchar Nigam Limited. The project, which has already been rolled out on a pan-India basis, is designed with an upgrade path to 5G.
In addition, international R&D partnerships have also expanded. A formal cooperation with a leading German applied-research institute creates an R&D bridge for photonics, quantum communication and 5G/6G work, opening the door to shared testbeds and access to advanced photonic-integration facilities.
This year’s C-DOT’s 42nd Foundation Day became a platform to underline that arc from rural switch to national infrastructure powerhouse. The institution was described as the guardian of the nation’s digital borders and tasked with becoming a global telecom innovation hub by 2047. The spotlight topics included AI, cybersecurity, 6G research and quantum communications. In keeping with the national aim of self-reliance, a NIDHI was launched to support women-led information and communication technology start-ups. This effort underscored how the institution is not just building technology but also nurturing a broader innovation ecosystem.
Institutional recognition has matched technical success. The highest maturity appraisal in software and systems development, CMMI-DEV v1.3 Level, underscores how reliably and consistently it can be delivered. Commercially, revenue growth reflects that trajectory – from Rs 0.8 billion in 2020-21 to Rs 5.66 billion in 2024-25, and now projected to touch Rs 10 billion in 2025-26.
Taken together, the recent product launches, quantum and international partnerships, incubation push and measurable commercial scale show that the organisation is more than just a public R&D lab. It is a practical engine of sovereign telecom capability, building deployable systems that scale from village exchanges to terabit backbones while strengthening national security.
