Microsoft Lobbies FCC Against Ban on Chinese Optical Transceivers

Chinese suppliers hold 66% of the global optical transceiver market, and Microsoft is lobbying the White House to keep them flowing into U.S. data centers. The FCC is weighing an import ban on the modules. Microsoft, which is building 35 data centers across the U.S. and has plans for 134 more, has met with the White House Office of Science and Technology Policy and the National Security Council, according to Reuters. The company is working alongside the Information Technology Industry Council (ITI) to push back on the proposed restriction.

The stakes are concrete. Optical transceivers are small modules plugged into hardware that convert electrical signals into light signals. That conversion lets data travel as light pulses across fiber optic cables. Data centers increasingly rely on them to move data between AI GPUs and server racks, because fiber links are faster, add lower latency, draw less power and produce less heat than copper connections.

What does a ban change for data center builders?

It would more than halve available supply. That shortfall would hit an industry already struggling with component shortages. AI chips would sit idle without the transceivers to link them together.

ITI Executive Vice President of Policy and General Counsel John Miller did not mince words. "It really threatens to arguably grind (the data center rollout) to a halt," he said. He added: "Those chips, without optical transceivers, literally could just sit there waiting around unutilized until you actually have the transceivers to essentially connect them together."

Why is the FCC considering the ban?

Security is the driver. Regulators worry that some Chinese-made transceivers could be compromised by Beijing and used to steal data, install malware, or remotely disrupt American data centers. The FCC took similar action against Huawei in the U.S. telecommunications network.

But the two cases differ in one decisive way. Huawei had many established competitors in telecom hardware. Optical transceivers for data centers have only two U.S.-based producers: Coherent and Lumentum. Both could build competing products. Neither has the manufacturing scale to cover the shortfall if Chinese imports stopped today.

Is there a compromise on the table?

Yes. One proposal from the Trump administration would ban only Chinese optical transceivers capable of 3.2 terabits per second. That speed class already exists in the market. Volume production is not expected to expand until 2028, with installation starting no earlier than 2029. The delay would give American producers time to scale their own output before the high-speed segment becomes standard. The suggestion remains under consideration, and no final FCC decision has been announced.

What happens next?

The FCC has not committed to a timeline. Microsoft and ITI continue to press their case with the administration. The outcome will shape whether hundreds of planned U.S. data centers get the components they need, on schedule and at current prices. For now, the industry waits on a regulatory decision that could rewire its supply chain.