Optical Cable Laying Route in India

India has laid nearly 698,010 route kilometres of optical fibre cables across the country, with southern states and strategic undersea connections forming key parts of the network.National OFC DeploymentAs of March 31, 2025, India has deployed 698,010 route kilometres of optical fibre cable (OFC) over the last three years, marking a significant expansion of digital infrastructure . The rollout has been concentrated in southern states, with Tamil Nadu (86,944 km), Kerala (81,764 km), Andhra Pradesh (70,544 km), and Telangana (65,270 km) leading the coverage . Maharashtra also contributes significantly with 56,211 km of OFC laid . This extensive network supports broadband, mobile networks, and digital services, particularly in rural and underserved areas.Public Sector InitiativesThe BharatNet Phase 3 program is central to India's public sector OFC expansion, with a budget of nearly ₹1.4 lakh crore. It aims to connect 40,000 additional Gram Panchayats and provide subsidized high-speed broadband to 15 million rural households. The project uses advanced ring-topology IP-MPLS networks and incorporates private sector partnerships to accelerate deployment and improve last-mile connectivity . The merger of Bharat Broadband Network Limited with BSNL has further enhanced national asset utilization and service uptime.Undersea Cable RoutesIndia's connectivity also relies on undersea fibre optic cables, which carry the majority of international data traffic. Currently, India is served by 17 trans-oceanic cables, with most landing at Versova, Maharashtra, creating a strategic concentration . These cables are laid using specialized ships and trenching devices to ensure proper placement on the seabed. Expanding undersea cable infrastructure is a priority to reduce vulnerability and support the growing demand for cloud, streaming, fintech, and AI-driven services .Strategic and Technological ConsiderationsThe optical cable network is designed to support next-generation broadband, 5G rollout, and AI-ready data centers, including in Tier 2 and Tier 3 cities . Pre-terminated fibre cabling systems and high-density network topologies are being deployed to handle parallel, high-bandwidth workloads. Industry estimates project India's fibre demand to triple to 60 million fibre kilometres annually, with 75% of cell towers targeted for fibre connectivity by 2025-26 .SummaryIndia's optical cable laying routes combine extensive terrestrial networks across states with strategic undersea connections, supported by public-private initiatives like BharatNet Phase 3. This infrastructure underpins the country's digital economy, enhances broadband penetration, and strengthens resilience for both domestic and international data traffic .