Poland's Largest 100G Coherent Module Deployment

Nearly 300 coherent QSFP28 100G 0 dBm modules by GBC Photonics were deployed in the Orange Polska network. This is the largest implementation of its kind in the country, which allowed the operator to significantly increase the throughput of aggregation nodes while reducing costs.

Goal: Efficient Migration from 10GE to 100GE

Orange's primary challenge was the need to rapidly modernize regional N x 10GE links to the 100GE standard between aggregation nodes. The operator was looking for a solution that would enable a smooth bandwidth increase without drastic rebuilding of the physical transport layer or the purchase of expensive muxponders. These nodes are a critical element of the network collecting traffic from access devices, where bandwidth demand grows exponentially with the development of 5G services and fiber internet.

Solution: IP-over-DWDM Architecture

Instead of a classic DWDM network expansion, the chosen approach was based on the IP routing concept. The 100G QSFP28 0 dBm coherent modules were installed directly in the routers, bypassing external transponders.

"Eliminating external transponders means not only lower deployment costs, but also cheaper maintenance, lower power consumption, and savings in precious rack space."

These modules are fully compatible with the SFF standard for currently deployed devices and CMIS for the next-generation operating systems, ensuring a safe path for future network development.

Results: A Network Ready for 5G

Thanks to the deployment of GBC Photonics technology, the Orange network is faster and ready for full implementation of 5G services. The modernization is carried out flexibly — "link by link" — which allows for optimal management of the investment budget.

The GBC Photonics coherent portfolio is now expanding with industrial-grade modules (I-Temp: -40°C to +85°C) and single-fiber solutions, with 800G units already available in the lineup.

The Orange case study proves that coherent modules are the future of modern aggregation networks.

DWDM Technology in Practice

Expert commentary on the 4.8 Tb/s deployment in the USA.

FAQ — 100G TECHNOLOGY

It is a QSFP28 optical module that enables 100Gbps transmission over long distances (up to 120km) without the need for external amplifiers and transponders in many scenarios.

The main advantage is network simplification. Modules are mounted directly in the router, eliminating the transponder layer, reducing power consumption, and saving rack space.

Yes, GBC Photonics modules are available in SFF and CMIS compliant versions, ensuring compatibility with virtually every modern aggregation router.

No, the deployment involved optimization of the aggregation network. The DWDM network still exists, but thanks to coherent modules in the routers, its expansion is now significantly cheaper and faster.