Lightcurve has selected Harmonic to power a multi-gigabit broadband service aimed at multi-dwelling units (MDUs), relying on the operator's existing coaxial plant rather than new fiber drops.

The partnership, disclosed this week and reported by Lightwave Online, places Harmonic's virtualized cable access platform at the center of Lightcurve's push to deliver symmetrical multi-gig speeds to apartment buildings, condominiums and other shared-housing properties. Financial terms, deployment volumes, and the first market for the rollout were not detailed in the announcement.

What is the operator building?

Lightcurve, a Pacific Northwest broadband operator focused on residential MDU connectivity, is positioning the service as a turnkey alternative to fiber-to-the-unit builds. Coax is already installed in most US apartment stock, so the operator avoids the civil works that drive up the cost of MDU fiber projects.

By layering Harmonic's Distributed Access Architecture (DAA) — including the vendor's virtual Cable Modem Termination System (vCMTS) software and remote PHY nodes — Lightcurve can light up DOCSIS 3.1 downstream capacity today, with a path to DOCSIS 4.0 upstream. DOCSIS 3.1 caps at roughly 10 Gbit/s downstream and 1–2 Gbit/s upstream; DOCSIS 4.0 extends that to 10 Gbit/s symmetrical on hybrid fiber-coax plant.

Why Harmonic?

Harmonic is one of two principal DAA suppliers to US cable operators, alongside Vecima (which acquired Cisco's Cable Access business in 2023). Its cOS platform has been deployed at Liberty Latin America, Telenet, Comporium and a handful of Tier-2 and Tier-3 US systems. A virtualized access stack gives a smaller operator like Lightcurve a multi-gig path without pulling fiber past the basement.

The vendor pitch is straightforward: a single platform handles DOCSIS 3.1 today and DOCSIS 4.0 as cable operators prepare for the next speed round. Harmonic has marketed the same proposition to operators weighing DOCSIS 4.0 against greenfield fiber-to-the-home.

Why MDUs matter

Roughly a third of US households live in multi-family housing, according to Census Bureau American Community Survey estimates — a stock that has historically been expensive to serve with fiber. Operators including AT&T, Frontier and a string of regional players have used G.fast, MoCA adapters or building-wide Wi-Fi to bridge the gap, with mixed commercial results.

Reusing coax in MDUs is not new. The shift in 2024–2025 is from sub-gig shared coax services to multi-gig dedicated coax paths running DAA, which treats the MDU as an extension of the HFC plant rather than a separate access technology.

What hasn't been disclosed

The announcement does not specify a launch date, the number of MDU buildings in the initial scope, headline speed tiers, or pricing. There is no indication of whether Lightcurve will wholesale the service to building owners or sell directly to residents.

Without those details, the commercial significance is hard to size. A multi-gig coax MDU service that wins contracts with several large property managers could give Lightcurve a defensible niche against fiber overbuilders in the Pacific Northwest, where Ziply Fiber, Astound Broadband and Quantum Fiber all compete for MDU contracts.

For Harmonic, the win extends the vendor's reach into the smaller-operator segment of the US cable market — a category that has been more willing than the Tier-1s to adopt a pure-software access architecture.

What to watch next

The next data points to track: Lightcurve's first named MDU customer, any disclosed speed tier, and whether the operator moves to DOCSIS 4.0 once upstream spectrum is cleared.