At Connected Britain 2025, LF Broadband governing board member Francisco de Carvalho, of Radisys, met with James Page to discuss how open source is transforming broadband access infrastructure and why interoperability is key to the future of connectivity.
In this short interview, Francisco traces the origins of LF Broadband from its roots in the Open Networking Foundation (ONF) to its current role under the Linux Foundation, where it continues to drive collaboration and innovation across the broadband ecosystem.
He highlights two foundational projects: the SEBA reference design (Software Enabled Broadband Access) and VOLTHA (Virtual OLT Hardware Abstraction), which together make it possible to integrate diverse hardware and software solutions without vendor lock-in.
“It basically means that as a hardware OEM, you don’t need to develop your own software. You can take the open VOLTHA software, integrate it into your hardware, and you have a solution that’s compliant with multiple management platforms,” Francisco explains.
The open, standards-based APIs of VOLTHA enable seamless interoperability across major operators and vendors, with real-world deployments already in place at large global service providers such as Deutsche Telekom and Türk Telekom.
Francisco also discusses LF Broadband’s close collaboration with the Broadband Forum, bridging open source development with established carrier compliance frameworks.
“Open source comes from a different world. The joining of the dots between open implementations and carrier-grade requirements is massive — and that’s where collaboration makes all the difference,” he says.
🎥 Watch the full interview here:
Learn more about our open broadband access projects and how they’re transforming networks – SEBA | VOLTHA.
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