Microsoft urges US to reconsider Chinese transceiver import restrictions

Security restrictions threaten data-center buildout

Microsoft and other technology companies and trade groups have asked the Trump administration to abandon planned restrictions on Chinese optical-transceiver imports because supply disruptions could slow US AI data-center construction. Three people familiar with the lobbying said Microsoft met with White House Office of Science and Technology Policy and National Security Council officials after Reuters reported in August that the administration was considering restrictions on new Chinese optical-transceiver models.

The proposed restriction remains under consideration rather than finalized. The Federal Communications Commission is working on the proposal, but the reviewed reporting did not establish a decision date or a final scope. Microsoft, the White House and the FCC did not comment to Reuters, while the Chinese embassy said Beijing firmly opposes what it called an abuse of national-security policy to suppress Chinese companies.

Missing transceivers could strand computing capacity

Optical transceivers connect servers, routers and switches through fiber-optic links. Information Technology Industry Council executive vice president John Miller said many cloud companies have already purchased the AI chips required for their buildouts, but those chips could remain unusable without the transceivers needed to connect them. Some data centers require millions of optical transceivers.

The transmission mechanism is therefore supply-side rather than a change in end demand: restrictions could leave installed AI processors disconnected even as cloud and AI workloads expand. ITI urged the FCC on August 13 not to add optical transceivers to its Covered List, citing potential supply-chain disruption to data-center deployment and US AI leadership.

US suppliers cannot readily replace Chinese volume

Counterpoint Research put China’s share of the global optical-transceiver market at two-thirds. Chinese manufacturers Eoptolink and Zhongji Innolight dominate global supply, with major US hyperscalers among their customers, according to Reuters. By contrast, US-based Coherent and Lumentum make competing products but lack the scale to replace Chinese vendors, a Foundation for American Innovation report said.

This creates tension between the proposal’s national-security rationale and current supply capacity. The House Select Committee on China argued that a Pentagon-listed Chinese military company should not wire American data centers and called on the FCC to keep new China-linked optical transceivers out of US networks. Zhongji Innolight did not immediately respond to Reuters.

Construction pipeline raises the cost of disruption

Cleanview tracked 35 Microsoft data centers under construction in the United States and another 134 planned. Those figures do not establish how many transceivers Microsoft would purchase or what proportion would be affected by the proposal, and the reviewed reporting did not disclose any optical-transceiver procurement award or purchasing commitment tied to the planned restrictions.

The relevant signal is therefore the intersection of a reported lobbying campaign and a large disclosed construction pipeline. It shows potential exposure to a policy decision, not a new supplier order or confirmation that Microsoft will change its sourcing.

Decision remains open to interpretation

Morgan Stanley reported that officials were considering restrictions on transceivers capable of handling 3.2 terabits of data per second. It cited a client note saying production of those models was not expected to ramp up until 2028, with widespread installation expected in 2029. One administration official separately said announcements would come directly from the administration and that reporting about additions to the Covered List should be regarded as speculation until then.

The next observable milestone is an FCC or White House statement defining whether restrictions will proceed and what models or performance thresholds they cover.

Industry and product implications