Constl achieves 1.6 Tbps transmission on live network using Ciena technology

This technical milestone signals a significant shift in regional backbone capacity, moving beyond standard gigabit thresholds to meet the massive data requirements of generative AI and hyperscale cloud providers. By integrating Ciena’s WL6e technology, Constl is positioning its fiber network as a primary conduit for high-bandwidth, low-latency traffic in the Indian market. For the broader streaming ecosystem, this level of throughput is essential for supporting the next wave of high-bitrate 8K delivery and edge computing services. Watch for Constl to announce further 800GE service rollouts across its pan-India NLD routes as it competes for dominant data center interconnect contracts.

Constl has been rapidly building its pan-India fiber footprint since its founding in 2023. In December 2025, Constl achieved a 1 Tbps line rate on a single optical channel using WaveLogic 6 Extreme across the 1,450 km Mumbai-Chennai route without regeneration, marking India's first such deployment by a digital infrastructure provider. At that time, Ankit Goel noted the company had already deployed over 12,000 km of fiber and connected approximately 100 data centers across 13 Indian cities, all powered by Ciena's optical technology. The 1.6 Tbps milestone on the Mumbai-Pune corridor announced in September 2026 represents a 60% capacity increase over that earlier achievement, doubling per-wavelength throughput from 800 Gb/s to 1.6 Tb/s compared to the prior WaveLogic 5 Extreme deployment.

The business case centers on Constl's positioning as a hyperscaler-focused network operator in India. Telecompaper reported that Constl completed the 1.6 Tbps optical transmission channel over its national long-distance network using Ciena's WL6e technology on the Mumbai-Pune corridor, enabling 800GE service delivery. Ciena's India general manager Prashant Ramesh Malkani framed the deployment as critical to advancing India's AI ambitions, while Constl's parent Space World Group positions the network as purpose-built infrastructure for hyperscalers, neo-scalers, telcos, and OTT/CDN operators. The company's strategy targets data center interconnect contracts across key NLD and metro routes connecting major Indian cities.

WaveLogic 6 Extreme represents Ciena's highest-capacity coherent optics platform, supporting 1.6 Tbps single-carrier wavelengths. Ciena's investor relations announcement confirmed that Constl's WL6e deployment doubles wavelength capacity compared to WaveLogic 5 Extreme while reducing cost per bit and improving spectral efficiency. For Constl, the technology upgrade directly addresses the bandwidth demands of AI network automation and hyperscale cloud providers that require multi-terabit capacity on long-haul routes without intermediate regeneration, a capability that reduces both capital expenditure on repeater sites and operational complexity across its growing national network.