REMINDER/XACCT Technologies to Present at Upcoming European Conferences: Billing Systems 2001, IP Carriers Business Models.

Business Editors/High-Tech Writers

REMINDER...for Sunday (April 22)

--(BUSINESS WIRE)

WHO & WHAT

The week of April 22, 2001, XACCT Technologies, Inc. -- the leading provider of business infrastructure software solutions for IP networks -- will speak at two conferences in London. XACCT CTO Limor Schweitzer will be speaking as well as co-chairing a pre-conference seminar at the Billing Systems 2001 Conference. In addition, XACCT Managing Director Richard Hubble will be speaking at the IP Carriers Business Models Conference.

WHERE AND WHEN

Billing Systems 2001 Conference April 22-April 26, 2001 Olympia Conference & Exhibition Center London, England

IP Carriers Business Models Conference April 22-23, 2001 The Radisson Edwardian Marlborough Hotel London, England

SESSION INFORMATION

Billing Systems 2001 Conference

-- "Overcoming the Challenges of Next Generation"

-- Co-chair: Limor Schweitzer, CTO, XACCT Technologies, Inc.

-- Monday, April 23, 2001; 9:00 a.m.-5:00 p.m.

-- "Mediating Pre-Paid Services in the Wireless Internet World"

-- Presenter: Limor Schweitzer, CTO, XACCT Technologies, Inc.

-- Monday, April 23, 2001; 10:40 a.m.

SESSION INFORMATION

IP Carriers Business Models

-- "Forecasting How Broadband Wireless Access Will Impact the

Business Strategies of IP Backbone Carriers"

-- Presenter: Richard Hubble, Managing Director, XACCT

Technologies, Inc.

-- Tuesday, April 24, 2001; 11:20 a.m.

About XACCT Technologies

XACCT Technologies is the market and technology leader in intelligent business infrastructure software for Internet carriers and network service providers. XACCT's award-winning, carrier-class "Network-to-Business" (N2B(TM)) platform speeds time to market and time to revenue for new Internet services while lowering service provider costs. XACCT offers the industry's first and only platform that enables real-time data capture and enhancement; seamless integration with any upstream business or operations application; and instantaneous, flow-through service provisioning. With offices around the globe, XACCT has more than 60 customers, including Bell Canada, British Telecom's Manx, Broadwing, Cable & Wireless, COLT, Global One, Genuity (formerly GTE), Interland, Mannesman Ipulsys, Siemens, TV Cabo, Verio, and WorldCom.