2003: Cisco Sues Huawei, Huawei Looks To 3Com
Cisco in 2003 sued Huawei for copying Cisco's proprietary code for use in Huawei switches. That code actually contained personal data inserted by the Cisco developer. Huawei denied the allegation, but it did stop making the products named in the lawsuit.
Later that year, 3Com and Huawei signed an agreement and joint venture to bring Huawei's high-end networking gear into the U.S. market.