Court Grants 3Com's Motion for Preliminary Injunction Against Xircom's RealPort and RealPort2 Products for Infringement of Patent.

Business Editors/High-Tech Writers

SANTA CLARA, Calif.--(BUSINESS WIRE)--July 24, 2002

3Com Corporation (Nasdaq:COMS) announced today that, in a patent infringement case against Xircom Corporation, Judge Tena Campbell of the U.S. District Court for the District of Utah granted 3Com's motion for a preliminary injunction to prohibit Xircom from manufacturing, using, selling, offering to sell within the United States, or importing into the United States, dozens of products, including RealPort and RealPort2 products. The preliminary injunction will take effect upon the posting of a bond by 3Com, which management intends to do immediately. The court's order expressly prohibits the further manufacture, sale or importation by Xircom of 26 RealPort and RealPort2 products identified in the order (see list of products below), and any colorable imitations of such products.

Background:

3Com Corporation, with 799 U.S. patents in its intellectual property portfolio, is an industry leader in technology innovation and offering practical products for its customers and partners.

Xircom, Inc. was acquired by Intel Corporation in 2001, after 3Com had filed its motion for a preliminary injunction on February 8, 2001. The court ruled on March 22, 2002, that 3Com was likely to prevail on its claim that Xircom infringes claim 29 of U.S. Patent # 6,146,209.

The following Xircom products were affected by the court's order: RBE-100BTX, RE-100BTX, RBM56G, RM56G, RM56V1, RM56V2, RM56V3, RBEM56G-100BTX, RBEM56G-100, RE-10BT, REM56G-100BTX, REM56G-10BT, XE2000, XM5600, XM5620, XEM5600, R2E-100BTX, R2BM56WGA, R2BM56WG, R2BM56W, R2M56GA, ISDN/DSL-R2I, R2I-NT1, R2BEM56WGA-100BTX, R2BEM56G-100BTX, R2BE-100BTX

About 3Com Corporation

3Com is a global leader in functionally rich, easy-to-use networking products that connect businesses to their employees, customers and suppliers anytime, anywhere. 3Com is also a leader in Internet protocol (IP) service platforms and access infrastructure for the network service provider market. In 1979, the company was founded by one of the inventors of Ethernet technology on which virtually all local area networks are based. Since then, 3Com has sold more than 360,000,000 Ethernet connections. 3Com has headquarters in Santa Clara, California and offices around the world. For further information, please visit www.3com.com, or the press site www.3com.com/pressbox.