Portal Software's Brian McCann to Present at Mobile Billing Congress; Presentations to Focus on IMS Billing Standards and Prepaid/Postpaid Convergence

Portal Software, Inc. (Pink Sheets:PRSF):

WHAT: Brian McCann, director of product marketing, Portal Software,
Inc., (Pink Sheets:PRSF) is a featured presenter at the Mobile
Billing Congress 2006. His presentation, titled "IMS Billing
Standards", will discuss how IMS billing standards are
developing; examine the leading IMS-based charging standard;
discuss ways to effectively manage billing and revenue; and
detail the importance of a robust real-time system.

WHO: Brian McCann, director of product marketing, Portal Software

WHERE: Mobile Billing Congress 2006, Hotel Majestic, Barcelona, Spain

WHEN: Thursday, April 27, 2006, 12:20 p.m.

Mr. McCann will also be leading a post conference workshopfocusing on strategies and case studies for prepaid/postpaidconvergence on Friday, April 28th at 9:30 a.m. The workshop will focuson:

-- Defining the convergence "perfect storm"

-- The current state of convergence and the forecast for the future

-- Different strategies for achieving convergence

-- Technical implications

-- Organization and business implications

-- Case studies: trends and what's working today

-- The pathway to the future

Additional information on the event can be found on the followingwebsite: www.telecoms.com/billingcongress.

About Portal Software, Inc.

Portal is the premier global provider of billing and RevenueManagement solutions for the communications and media markets. Thecompany delivers the only platform for the end-to-end management ofcustomer revenue across offerings, channels, and geographies. Portal'ssolutions enable companies to dramatically accelerate the launch ofinnovative, profit-rich services while significantly reducing thecosts associated with legacy billing systems. Portal is the RevenueManagement 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 FranceTelecom.