Summary signal: LF Broadband is pleased to recognize a significant deployment milestone: Netsia BB Suite, built on the SEBA (SDN-Enabled Broadband Access) reference architecture hosted by LF Broadband, has now exceeded 1 million homes passed on Türk Telekom’s production network.
Release Highlights
Open Source Broadband at Scale: Netsia BB Suite Passes 1 Million Homes on Türk Telekom’s Network
LF Broadband is pleased to recognize a significant deployment milestone: Netsia BB Suite, built on the SEBA (SDN-Enabled Broadband Access) reference architecture hosted by LF Broadband, has now exceeded 1 million homes passed on Türk Telekom’s production network. The deployment spans all 81 provinces of Türkiye, making it one of the largest open source broadband access network deployments operating in production anywhere in the world.
Türk Telekom first launched Netsia BB Suite commercially in 2021, marking one of the earliest carrier-scale production deployments of the SEBA and VOLTHA platforms globally. Since that initial launch, the network has expanded continuously, with Netsia’s carrier-grade implementation of SEBA enabling Türk Telekom to manage its fiber access infrastructure through a cloud-native, vendor-agnostic control plane.
Architecture Overview
What SEBA Makes Possible
The SEBA reference design, developed and maintained within the LF Broadband community, provides a common architecture for disaggregated broadband access. Rather than relying on proprietary, vendor-specific control software bundled with each piece of access hardware, SEBA enables operators to separate the control plane from the physical layer and manage multi-vendor optical line terminal (OLT) equipment through a unified software stack. VOLTHA, the open source project that serves as SEBA’s core virtualization layer, provides vendor-agnostic OLT management through a standardized northbound API and a set of vendor-specific southbound adapters.
For Türk Telekom, this architecture meant the ability to deploy OLT hardware from multiple vendors under a single management plane, reduce dependence on proprietary software licensing, and introduce new services through software rather than hardware upgrades. The LF Broadband case study on Türk Telekom’s deployment details the specific CAPEX and OPEX outcomes, as well as the technical architecture behind the transition from legacy OLT systems to the SEBA framework.
Implementation Details
A Deployment That Has Earned Recognition
The Netsia BB Suite deployment received external validation at the Network X Awards 2025, where it was recognized in the “Outstanding Multi-Gigabit Fibre Access Innovation” category. The recognition reflects both the technical depth of the implementation and the operational scale at which SEBA is running in production.
Türk Telekom co-chairs the LF Broadband Governing Board, and Netsia is an active contributor to the SEBA and VOLTHA projects. This deployment is a direct expression of that upstream investment: an operator building production infrastructure on the same open source codebase it helps develop and maintain.
Open Source Broadband in Production
LF Broadband’s SEBA and VOLTHA projects exist to give network operators a credible, community-maintained alternative to vertically integrated, closed access systems. The Türk Telekom deployment demonstrates what that alternative looks like at carrier scale: a production network serving millions of subscribers, running across national infrastructure, managed through open source software that any operator can inspect, contribute to, and deploy.
Next Steps
For operators evaluating a similar path, the LF Broadband case study on Türk Telekom’s access transformation is available at: https://lfbroadband.org/turk-telekom-transforms-access-network-with-open-source-voltha/
To learn more about the SEBA and VOLTHA projects, or to explore membership in LF Broadband, visit lfbroadband.org.
About LF Broadband
LF Broadband hosts open source projects that support disaggregated broadband access networks, including SEBA and VOLTHA. These projects provide community-maintained software and reference architectures for network operators evaluating open source broadband infrastructure.
About The Linux Foundation
The Linux Foundation is the organization of choice for the world’s top developers and companies to build ecosystems that accelerate open technology development and commercial adoption. Together with the worldwide open source community, it solves the hardest technology problems by creating the largest shared technology investment in history.
Last updated: 2026-06-29
