Authored by Marc Kavinsky, Lead Editor at IoT Business News.
Mlink has initiated live over-the-air testing of its MS150-IR IoT-NTN chipset via Iridium NTN Direct, transitioning the hardware silicon from lab-based verification to real satellite network trials. This development is significant because it opens up an additional chipset pathway for OEMs and module manufacturers pursuing standards-based satellite NB-IoT and direct-to-device connectivity.
For a growing number of IoT deployments, the connectivity challenge is no longer about linking a sensor within a city, a warehouse, or along a key transportation route. The more pressing concern is what occurs when the same asset, vehicle, utility installation, or industrial system moves beyond the reach of ground-based networks, or functions in an area where cellular coverage is spotty or too costly to expand.
That backdrop frames Iridium Communications’ most recent NTN Direct achievement. Mlink Technology has commenced live, over-the-air evaluation of its MS150-IR IoT-NTN chipset on Iridium NTN Direct, Iridium’s 3GPP-compliant non-terrestrial network offering. The MS150-IR is a tailored variant of Mlink’s MS150 chipset series engineered specifically for Iridium NTN Direct as part of the firm’s wider IoT-NTN product lineup.
This announcement does not signal a commercial service rollout, and it should not be interpreted as such. Its importance is more focused yet still meaningful: Mlink reports that the chipset has passed Iridium’s internal lab assessments and has now advanced to real-world, over-the-air validation on the Iridium satellite network. Both Iridium and Mlink expect certification and market-ready products to arrive by the close of 2026.
Why chipset-level validation matters
Satellite IoT news often revolves around promises of coverage or service availability. This update stands apart because the effort is concentrated on the silicon and reference design front, where many of the real-world obstacles to adoption are either mitigated or magnified. When a chipset receives validation for a particular NTN service, module suppliers and OEMs gain a more straightforward hardware roadmap than they would with a fully proprietary terminal design.
Mlink has also unveiled a reference design kit, as noted in the announcement. That detail carries practical weight: OEMs building tracking devices, smart meters, remote monitoring units, or industrial equipment generally need more than just a baseband chipset. They require a foundation for RF engineering, software integration, power management strategy, and certification preparation. A reference design doesn’t eliminate all the engineering effort—especially for devices that must run on battery power or endure extreme conditions—but it can reduce the number of unknowns at the early stages of a product development cycle.
Iridium NTN Direct is built around 3GPP-based NB-IoT and direct-to-device connectivity delivered through Iridium’s network of 66 interlinked low Earth orbit satellites. The service targets IoT applications spanning asset tracking, supply chain logistics, utilities, agriculture, automotive, industrial monitoring, and remote infrastructure. For IoT practitioners, the standards-based nature is the critical aspect: it is designed to enable chipset vendors, module makers, OEMs, and mobile network operators to weave satellite connectivity into their products and networks without having to build out additional ground-based infrastructure.
Not just another satellite IoT module story
The distinguishing characteristic here is the pairing of a purpose-built Mlink chipset variant with Iridium’s standards-based NTN offering, rather than a standalone satellite modem locked into a proprietary device ecosystem. That difference is meaningful for manufacturers striving to keep their device roadmaps in step with cellular IoT architectures. A standards-based methodology can simplify the evaluation of satellite connectivity alongside existing NB-IoT product plans, even though certification, antenna engineering, power budgeting, and commercial negotiations still factor into any deployment.
A practical consequence flows from the testing phase itself. The shift from laboratory validation to live satellite testing indicates that integration has matured to a stage where actual network performance can be measured, but it also means that OEMs should regard the technology as pre-commercial until certification and product availability are formally confirmed. For system integrators and enterprise buyers, this serves as a strategic planning indicator rather than an immediate purchasing cue.
For mobile network operators and connectivity service providers, the wider relevance lies in service expansion. NTN Direct is being framed as a means to push low-power IoT coverage past the boundaries of terrestrial networks by leveraging a global satellite platform. If delivered as envisioned, it could underpin managed IoT solutions where satellite functions as a supplementary coverage layer for remote or mobile assets, rather than operating as an entirely separate connectivity category.
For industrial end users, the value proposition is more narrowly defined: remote infrastructure, utility assets, agricultural machinery, and logistics operations frequently sit at the margins of cellular network economics. A certified chipset ecosystem would simplify the task of embedding satellite fallback or satellite-native functionality into device form factors already optimized for low-power IoT.
The final remaining milestone is certification. Until that is achieved, the progress of the Mlink MS150-IR is best understood as ecosystem groundwork for Iridium NTN Direct: an essential step toward broader device availability, but not yet evidence of commercial-scale deployment. In a sector saturated with satellite IoT assertions, that distinction is precisely what makes this announcement worth following.
