| Wednesday June 16, 6:36 pm Eastern Time Company Press Release
 Xircom Seeks to Identify Individual Claiming to Be an Employee for Posting False Statements Online
 
 THOUSAND OAKS, Calif.--(BUSINESS WIRE)--June 16, 1999--Xircom, Inc. (Nasdaq:XIRC - news), the world leader in connectivity solutions for mobile computing professionals, filed a lawsuit on May 5, 1999, in the Ventura County, Calif., Superior Court to identify and recover damages from an anonymous individual (''John Doe''), claiming to be an employee, who posted several messages on the Yahoo! stock message boards.
 
 Xircom asserts that the information posted in the chat room was unlawful because the statements contained false information about Xircom and its products and have caused harm to the company.
 
 As a publicly held company Xircom expects and encourages free and open comment on its business. However, the company does not tolerate false and harmful statements of fact about its business practices and products, particularly by a person claiming to be an employee intending to add undue credibility to their statements. Efforts to continue Xircom's success in the growing mobile connectivity market obligate the company to take legal action to guard its reputation against harmful false statements of fact.
 
 For more detailed information, please visit the Xircom website at www.xircom.com/johndoe. To schedule an interview with a Xircom spokesperson, contact Bethany Burnam at 805/376-6813 or send e-mail to bethany_burnam@xircom.com.
 
 Xircom is issuing this advisory in response to public comments attributed to counsel representing the person John Doe.
 
 About Xircom
 
 Xircom, Inc., founded in 1988, is the world's leading manufacturer and OEM supplier of mobile communications solutions, including Integrated PC Card and PC Card products, for connecting portable computer users to corporate networks, the Internet and other online resources.
 
 The company's products are sold and supported in over 100 countries through a global network of distributors, integrators and resellers. Xircom, headquartered in Thousand Oaks, with regional headquarter offices in Antwerp, Belgium, Tokyo, Japan and Singapore, has 1,200 employees worldwide and trailing four-quarter revenue of $353 million.
 
 More information about Xircom and Xircom products can be found at www.xircom.com. U.S. Sales: 800/438-4526 Telephone: 805/376-9300 Fax: 805/376-9311
 
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 Contact:
 
 Xircom Inc., Thousand Oaks
 Bethany Burnam, 805/376-6813 (U.S.)
 bethany_burnam@xircom.com
 or
 Xircom Europe
 Carina Govaert, +32/3-450-0904
 carina_govaert@xircom.com
 or
 Xircom Asia Pacific
 Monica Li, +65-732-5001
 monica_li@xircom.com
 or
 Xircom Japan
 Reiko Iwado, +81/(0)3-3407-0033
 reiko_iwado@xircom.com
 
 biz.yahoo.com
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