Large-Capacity Coherent Ring DCI Solution

As cloud computing, AI workloads, and data center interconnect services continue to scale worldwide, data centers are increasingly required to exchange massive volumes of data in real time. Traditional interconnection architectures based on 100G or 200G wavelengths are reaching their limits in terms of capacity, operational complexity, and cost efficiency. Operators and enterprises now need an optical network foundation that can deliver ultra-high bandwidth, deterministic reliability, and fast service rollout while keeping long-term TCO under control.

To address this demand, Sino-Telecom introduces a next-generation coherent optical ring solution designed for metropolitan multi-data-center environments. The solution provides a future-ready DCI infrastructure that supports continuous business growth with a simple, scalable, and highly resilient optical architecture.

Current Challenges of DCI

• Rapidly Increasing Bandwidth Demand: 100G/200G architectures require many ports and wavelengths, making scaling complex, inefficient, and costly.
• Extremely High Reliability Requirements: Mission-critical demand high-level  protection and fast recovery.
• Complex Operations and Slow Deployment: Multi-layer designs and numerous optical modules increase planning complexity and extend deployment cycles.
• Rising Cost and Power Consumption: More equipment and optics drive up TCO and power usage, putting pressure on energy efficiency.

Why Coherent Optical Ring

A coherent optical architecture combined with optical-layer protection provides the most effective way to solve these challenges. By transporting traffic directly at high-bandwidth wavelengths on the DWDM layer, large amounts of data can be carried on far fewer fibers and ports, significantly improving spectral efficiency and simplifying the network. At the same time, optical-channel-level protection enables fast fault recovery without relying on complex electrical-layer switching, ensuring carrier-grade reliability for mission-critical services.

Sino's 1.6T Coherent Ring DCI Solution

The solution is built on a 400G coherent DWDM ring with OCH (optical channel) level protection. Each data center connects to the ring through high-speed 400G Ethernet client interfaces that are mapped directly to tunable 400G coherent optical channels on the line side. These wavelengths are transported over the metro optical ring, forming a fully protected optical backbone between all sites.

When a fiber cut or node failure occurs, the OCH protection mechanism performs automatic switching within 50 milliseconds, rerouting traffic along the alternate direction of the ring. Because this protection operates at the optical layer, services remain uninterrupted and do not require complex electrical-layer reconfiguration.

This solution delivers clear, quantifiable benefits to operators and data center owners:

• High Capacity, Future-Ready: Up to 1.6T per site with a smooth upgrade path to 48 × 800G, ensuring long-term investment protection.
• Simplified Operations: Tunable wavelengths and unified NMS enable integrated optical-electrical visibility and easier management.
• Fast Deployment: Plug-and-play modular design supports rapid discovery and service provisioning.

Customer Application Case

This solution has been successfully deployed across multiple cities and regions, including metropolitan multi-DC networks in Indonesia, large-scale cloud data centers, disaster recovery links, and regional backbone ring upgrades throughout major urban areas in China and Southeast Asia. All deployments use Sino Telecom STN6800-D16/16HE equipment with integrated OTN, WDM, and EDFA modules, fully certified (CE/FCC/...) and performance tested, ensuring reliable, high-quality operation for multi-DC and metropolitan interconnections. Contact us to discover how this proven solution can support your network deployment.