Mlink has begun live on-air testing of its MS150-IR IoT-NTN chipset on Iridium NTN Direct, moving the device silicon from laboratory validation into satellite network testing. The step matters because it adds another chipset route for OEMs and module makers looking at standards-based satellite NB-IoT and direct-to-device connectivity.

For many IoT deployments, the connectivity problem is no longer whether a sensor can be connected in a city, a warehouse or along a major transport corridor. The harder question is what happens when the same asset, vehicle, utility site or industrial system moves outside terrestrial coverage, or operates in a region where cellular service is intermittent or economically impractical to extend.

That is the context for Iridium Communications’ latest NTN Direct milestone. Mlink Technology has started live, on-air testing of its MS150-IR IoT-NTN chipset using Iridium NTN Direct, Iridium’s 3GPP standards-based non-terrestrial network service. The MS150-IR is a specialized version of Mlink’s MS150 chipset family developed for Iridium NTN Direct as part of the company’s broader IoT-NTN portfolio.

The announcement is not a commercial service launch, and it should not be read as one. Its significance is narrower but important: Mlink says the chipset has completed Iridium laboratory testing and has now moved into over-the-air validation on the Iridium network. Iridium and Mlink anticipate certification and product availability before the end of 2026.

Why chipset-level validation matters

Satellite IoT announcements often focus on coverage claims or service availability. This one is different because the work is taking place at the silicon and reference design layer, where many of the practical barriers to adoption are either reduced or amplified. If a chipset is validated for a specific NTN service, module vendors and OEMs have a clearer hardware path than they would with a purely proprietary terminal architecture.

Mlink has also introduced a reference design kit, according to the announcement. That detail is operationally relevant: OEMs developing trackers, meters, remote monitors or industrial devices typically need more than a baseband chipset. They need a starting point for RF design, software integration, power management and certification planning. A reference design does not remove all engineering work, particularly for devices that must operate on battery power or in harsh environments, but it can reduce the number of unknowns early in a product program.

Iridium NTN Direct is positioned around 3GPP-based NB-IoT and direct-to-device connectivity over Iridium’s constellation of 66 cross-linked low Earth orbit satellites. The service is aimed at IoT use cases including asset tracking, logistics, utilities, agriculture, automotive, industrial monitoring and remote infrastructure. For IoT professionals, the standards-based element is the key point: it is intended to let chipset vendors, module manufacturers, OEMs and mobile network operators build satellite reach into products and networks without deploying additional terrestrial infrastructure.

Not just another satellite IoT module story

The distinct feature here is the combination of a specialized Mlink chipset variant and Iridium’s standards-based NTN service, rather than a standalone satellite modem tied to a closed device ecosystem. That distinction matters for manufacturers trying to keep device roadmaps aligned with cellular IoT architectures. A standards-based approach can make satellite connectivity easier to evaluate alongside NB-IoT product plans, although certification, antenna design, power budgeting and commercial agreements still remain part of the deployment equation.

A practical implication follows from the testing phase itself. Moving from lab validation to live satellite testing suggests the integration has reached a point where real network behavior can be assessed, but it also means OEMs should treat the technology as pre-commercial until certification and product availability are confirmed. For system integrators and enterprises, this is a planning signal rather than an immediate procurement trigger.

For mobile network operators and connectivity providers, the broader relevance is in service extension. NTN Direct is being positioned as a way to extend low-power IoT coverage beyond terrestrial footprints through a global satellite platform. If commercialized as planned, that could support managed IoT offerings where satellite acts as a coverage layer for remote or mobile assets rather than as a completely separate connectivity category.

For industrial users, the value proposition is more specific: remote infrastructure, utility assets, agricultural equipment and logistics flows often sit at the edge of cellular economics. A certified chipset ecosystem would make it easier for device makers to embed satellite fallback or satellite-native operation into form factors already designed for low-power IoT.

The remaining milestone is certification. Until then, the Mlink MS150-IR’s progress is best viewed as ecosystem development for Iridium NTN Direct: a necessary step toward broader device availability, but not yet proof of commercial deployment at scale. In a market crowded with satellite IoT claims, that distinction is exactly what makes the announcement worth watching.

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