Motorola’s plan to sell its wireless network equipment business to Nokia Siemens Networks (NSN) hit a roadblock on Monday, as a U.S. district court judge granted Huawei Technologies’ request for a temporary restraining order to block the transmission of proprietary Huawei technologies to NSN as part of the proposed $1.2 billion transaction. Based in China, Huawei has risen rapidly through the ranks of the world’s top telecom equipment suppliers to claim second place in the global network equipment marketplace behind Ericsson of Sweden. The complaint, filed by Huawei with the U.S. District Court for the Northern District of Illinois, concerns networking products that Huawei has provided to Motorola and that, in turn, are sold by Motorola under its own brand name. According to Huawei, the proposed deal violates clauses in the cooperative agreement between Huawei and Motorola that prohibit the transfer of sensitive Huawei information to third parties without the consent of the Chinese company. Huawei also argued that the transmission of such data to NSN would cause “irreparable harm” owing to NSN’s standing as a direct competitor against Huawei in the global network equipment sector. (Upon consummation of the Motorola-NSN deal, NSN would bypass Huawei as the world’s second-largest network equipment supplier.) Monday’s ruling orders Motorola “not to disclose any of [the] plaintiff’s confidential information to defendant [NSN]” and could ultimately lead to a permanent injunction for which a hearing is yet to be scheduled. Motorola, on the other hand, has accused Huawei of stealing proprietary Motorola designs, and filed suit against the Chinese equipment maker shortly after announcing the NSN deal last year.