Portal Software, Inc.’s (Pink Sheets:PRSF) Senior Vice President of Sales, Marketing, and Alliances, Bhaskar Gorti, is a featured presenter on the “Promise of Triple Play/Quadruple Play” panel at the Total Telecom World Telecommunications Congress. The presentations will focus on IMS Billing Standards and Prepaid/Postpaid Convergence.

The panel will address new and alternative business models; how to make bundled services work; VOD as the killer app; assessing the best technology solutions; QOS issues; and global success stories.

The presentation will be at the Total Telecom World Telecommunications Congress, Hotel President Wilson, Geneva, Switzerland, on Thursday, April 27, 2006, 2:50 p.m. Additional information on the conference can be found on the Total Telecom World Telecommunications Congress website at http://www.totaltelecomworldcongress.com.