South Africa’s DFA sets network scale path with 1.6 Tbps trial

The service provider sees its planned deployment of Ciena’s optical technology to future-proof its network and drive economic growth in the region.
Aug. 28, 2025
3 min read

Key Highlights

  • DFA and Ciena demonstrated a groundbreaking 1.6 Tbps transmission over a 40 km route, marking a significant milestone in South Africa's optical networking.
  • The deployment utilizes Ciena’s WaveLogic capabilities and Navigator NCS to enable scalable, automated, multi-layer network operations.
  • The network upgrade is part of DFA’s three-phase plan, starting with Gauteng and expanding to other regions, to enhance capacity and resilience nationwide.
  • The use of underground distribution cabinets accelerates service deployment and supports higher fiber volumes for future high-speed services.
  • This initiative positions DFA to onboard next-generation connectivity services and scale their network infrastructure efficiently.

DFA, a South African enterprise connectivity provider, and Ciena recently demonstrated transmission of 1.6 Tbps over a single wavelength.

Conducted over a 40 km stretch between Isando and Midrand, using DFA’s high-capacity core network, the trial’s route replicates the previous trial that had demonstrated 400 Gbps capability.

Andreas Uys, CTO at MAZIV, DFA’s parent company, said the trial shows how it can “onboard next-generation connectivity services in selected regions before scaling them nationwide.”

Focus on scale

Leveraging Ciena’s WaveLogic capabilities, which were deployed by Ciena partner Willcom, the WaveRouter will allow DFA to deliver greater scalability by integrating 400 Gbps, 800 Gbps, and 1.6 Tbps services within a single router.

By combining Ciena’s optical and routing technologies in a unified, multi-layer architecture, DFA can fully harness the advantages of coherent routing to build a simpler, more robust network. Additionally, Ciena’s Navigator Network Control Suite (Navigator NCS) provides DFA with one point of control to automate multi-layer network operations and scale wide area network (WAN) traffic, delivering capacity precisely when and where it’s needed.

“With Ciena’s optical and routing technologies, DFA is better positioned to deliver high-scale 400 Gbps aggregation today while preparing its network to scale up to 1.6 Tbps and beyond,” said Virginie Hollebecque, VP of EMEA for Ciena.

Three-phase network upgrade

The 1.6 Tbps trial follows Phase 1 of DFA’s R800 Million network upgrade. This upgrade included deploying Dry Underground Distribution Cabinets (DUDCs) in high-density areas to speed up service delivery. DFA’s DUDC deployment, which began in August 2023, is designed to support higher fiber volumes linked to access services – including dark and lit managed services – as well as accelerate service delivery and improve resilience.

Since the company first began rollout in 2007, DFA has deployed fiber infrastructure across major metros, secondary cities, and towns across South Africa.,

As DFA began the network upgrade strategy in 2022 and 2023, it saw several network incidents that affected customers in parts of Gauteng province. The province represented the highest density of infrastructure for the DFA’s network.

DFA’s network upgrade is being conducted in three main phases. During phase one, the service provider is focusing on Gauteng, with the migration of existing services continuing over the next 12 to 24 months.

Phase 2 will consist of upgrades in the Western Cape and KwaZulu-Natal in 2026, while Phase 3 will cover the rest of the national network over two to three years.

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About the Author

Sean Buckley

Sean is responsible for establishing and executing the editorial strategy of Lightwave across its website, email newsletters, events, and other information products.

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