Finland Fiber Optic Enterprise Router 800G

Elisa Oyj in Finland has deployed 800Gbps Ethernet services using Juniper PTX10002-36QDD routers with 800ZR coherent optics, pioneering high-capacity fiber backbone networks.

Deployment Overview

Finland's leading telecom provider, Elisa Oyj, has implemented 800G technology in its backbone network, starting in the Helsinki metropolitan area, to enhance both mobile and optical fiber infrastructure . The deployment uses Juniper Networks PTX Series Routers, specifically the PTX10002-36QDD, combined with JCO800 coherent pluggable optics, enabling ultra-high-capacity Ethernet services over existing fiber networks .

Technology and Architecture

The deployment leverages Juniper's Converged Optical Routing Architecture (CORA), which integrates IP over DWDM (IPoDWDM). This approach allows IP traffic to be sent directly over DWDM networks using coherent pluggable optics, eliminating the need for multiple intermediary network elements and simplifying network design . The 800ZR+ coherent transceivers convert IP traffic into DWDM-ready wavelengths, supporting long-reach, high-capacity transport with 0dBm output power, which reduces signal loss over extended distances . The PTX10002-36QDD router is cloud-optimized and built on Juniper's Express 5 ASIC, supporting dense 100GbE, 400GbE, and 800GbE connections. It accommodates both gray and coherent optics in the same port form factor (QSFP-DD), providing flexibility to scale based on traffic demands while optimizing space and energy efficiency .

Benefits and Impact

• Increased Backbone Capacity: Each fiber can now carry 800Gbps, significantly boosting network throughput .
• Operational Efficiency: The architecture reduces the number of network elements, lowers operational costs, and simplifies deployment .
• Energy and Space Optimization: Compact, energy-efficient design reduces power consumption and cooling requirements, minimizing carbon footprint .
• Future-Proofing: Supports scalable growth for AI, cloud services, and inter-data center connectivity, preparing Finland's network for rising data demands .
• Enhanced Reliability: Ensures stable, secure, and resilient transport for critical digital services and cross-border data exchanges .

Strategic Significance

By pioneering 800G coherent deployments, Elisa is setting a benchmark for high-capacity, sustainable fiber networks in Finland. This deployment not only strengthens Finland's domestic telecom infrastructure but also enhances international connectivity, supporting both consumer and corporate digital services . The initiative positions Finland at the forefront of next-generation fiber and mobile network technology.