Portal Software, Inc. Earnings Announcement Scheduled for May 17th

Business Wire, May 10, 2001

Business Editors/High Tech Writers

CUPERTINO, Calif.--(BUSINESS WIRE)--May 10, 2001

Portal Software, Inc. (Nasdaq: PRSF), a leading provider of business infrastructure software for next-generation communications services, will announce its financial results for its first quarter fiscal year 2002 on Thursday, May 17, 2001.

On May 17, 2001 the company will issue a press release after the market close, and a conference call will begin at 5:00 p.m. EDT. John Little, founder and chief executive officer, and Jack Acosta, chief financial officer at Portal will host the call. An audio feed of the conference call can be accessed through a link on the investor relations page of the company's Web site, http://www.portal.com/about_portal/investor_relations/, or at www.companyboardroom.com . A replay of the call will be available until June 1, 2001.

Portal Software provides software to manage next-generation communications and e-services. The Infranet software platform enables service providers to rapidly deploy new services, define optimal business models and price plans, and bill their users. Portal's software is licensed by more than three-quarters of the world's 25 largest communications services companies to support wireless, broadband Internet, next-generation voice, and other e-service offerings. Customers include AOL Time Warner, Reuters, Qwest Communications, Sprint, NTT, Deutsche Telekom, Telenor Mobil AS, China Telecom, and France Telecom. Portal Software employs over 1,500 people at more than 40 offices worldwide.