Cisco Systems has broadened its allegations against Huawei Technologies, accusing the Shenzhen-based firm of having infringed the American company's intellectual property rights to a greater extent than Huawei previously admitted.
In a 19-page motion to the United States District Court in Texas, Cisco said it had discovered new evidence showing Huawei routers identified themselves to a network as being Cisco products.
'This false identification must result from Huawei having copied Cisco's [data link switching] protocol source code, unless Huawei deliberately programmed its routers to identify them as having been manufactured by Cisco,' the company said in its filing.
Cisco also accused Huawei of continuing to 'enjoy the fruits of its misappropriation of Cisco source code and the infringement of Cisco copyrights' despite Cisco's first suit in January.
According to Cisco, Huawei admitted to copying its enhanced interior gateway routing protocol (EIGRP), which made up just 2 per cent of Huawei's versatile routing platform.
But Cisco claimed the copying showed Huawei had attempted to make its products 'virtually identical' to the commands of Cisco's routing software.
'Even if Huawei were correct as to the percentage of its code which was taken from Cisco, the importance of the literal copying far exceeded the numerical percentage,' it said.