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

Business Editors/High-Tech Writers

ADVISORY...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.

Main Presentation Topics:

Understanding the Implications of Developing a Next Generation

Pre-Paid Solution on Mediation Solutions:

-- Dealing with millions of billable events per second

-- Enabling Real-Time Billing

Exploiting Technology to Maximize Profitability:

-- Managing rapid changes in tariffs and services

-- Coping with complicated roaming and interconnect

agreements

-- Supporting debit and credit payment models

-- How current mediation solutions will be able to cope

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.

Main Presentation Topics:

-- Identifying and overcoming the challenges of enabling mass

wireless access to the IP network

-- Evaluating new revenue streams that will emerge as a

result of anytime access on demand

-- Assessing the impact of UMTS license holders' business

models on the commercial strategies of fixed IP carriers

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.

Americas Headquarters:              EMEA/APAC Headquarters:

XACCT Technologies                  XACCT Technologies
2900 Lakeside Drive                 12 Hachilazon Street
Santa Clara, CA 95054               Ramat Gan 52522, Israel
Tel: [phone]                   Tel: [phone]