Telecom Argentina Selects Portal Software to Bring Voice, Data, and Next Generation Services to Market; Portal Successfully Demonstrates Its Capabilities in One-Tenth the Time of the Competition

Business Wire, March 14, 2006

CUPERTINO, Calif. -- Portal Software, Inc. (Pink Sheets:PRSF), the premier global provider of billing and Revenue Management solutions for telecommunications and media markets, announced today that Telecom Argentina has selected Portal 7 to power creative pricing and promotion plans and fully convergent services for its customers. Initially, Telecom Argentina will deploy Portal 7 to provide rating for high-speed data and VoIP service offerings to its broadband customers.

Telecom Argentina selected Portal because of Portal 7's flexibility and its ability to support both the company's current business requirements and its long term growth plans. Portal was able to quickly demonstrate Portal 7's superior capabilities through a pilot rating project which Portal successfully completed in one-tenth the time of Portal's competitor.

"In the highly competitive Argentine market, it is essential that we are able to quickly capitalize on emerging trends in broadband," said Guillermo Desimoni, executive director of information technology, Telecom Argentina. "Portal, through pilot programs and references, was able to demonstrate its superior ability to rapidly create innovative pricing and promotional offers that lead to higher margins and improved customer satisfaction."

Telecom Argentina, an operator with over three million subscribers of its services, selected Portal because of Portal 7's flexibility and its ability to support both the company's current business requirements and its long term growth plans.

"Telecom Argentina is pioneering new levels of customer services in the Argentine market," said Bruce Grainger, Portal's vice president of sales for the Americas. "Portal provides Telecom Argentina with a flexible system that can support its entire range of services, from broadband to fixed and mobile, all on a single, scalable platform."

About Portal Software, Inc.

Portal is the leading worldwide provider of billing and Revenue Management solutions for the global communications and media markets. The company delivers the only platform for the end-to-end management of customer revenue across offerings, channels, and geographies. Portal's solutions enable companies to dramatically accelerate the launch of innovative, profit-rich services while significantly reducing the costs associated with legacy billing systems. Portal is the Revenue Management partner of choice to the world's leading service providers, including Vodafone, AOL Time Warner, Deutsche Telekom, Telstra, NTT, China Telecom, Reuters, China Mobile, Telenor Mobil, and France Telecom.

Forward Looking Statement

Statements in this release regarding potential customer relationships, the possibility of Portal providing contracted services and realizing future financial gains are forward looking statements. Such forward looking statements may not materialize and involve significant uncertainties and risks. These and other factors are described in detail in our Annual Report on Form 10-K for the fiscal year ended January 31, 2004 and our quarterly reports on Form 10-Q. All statements made in this press release are made only as of the date set forth at the beginning of this release. Portal undertakes no obligation to update the information in this release in the event facts or circumstances subsequently change.

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