CrossKeys Announces CrossKeys Resolve Sale to WorldCom: WorldCom deploying CrossKeys Software in Global IP Network.

Business Editors

VIENNA, VA--(BUSINESS WIRE)--Nov. 28, 2000

CrossKeys Systems Corporation (NASDAQ:CKEY)(TSE:CKY.) announced today a multi-million dollar sale of CrossKeys Resolve(R) software to WorldCom.

CrossKeys Resolve software provides a unique method to measure and monitor Internet Protocol (IP) network performance, which is vital for the growth of e-commerce and other Internet applications.

This is the most significant sale to-date of CrossKeys software for managing IP-based network services. In this deployment, WorldCom will use CrossKeys Resolve software to draw network and service data from its proprietary network management system.

WorldCom is a leading company setting the standard in Internet service. "This sale demonstrates the engineering strength of CrossKeys software through its ability to address the complex business and technical challenges of a large service provider," says Ian McLaren, President and CEO, CrossKeys.

About CrossKeys

CrossKeys Systems Corporation (www.crosskeys.com) develops software that makes the Internet work for business. The world's largest and fastest growing service providers manage the equipment, traffic, and service on their networks with CrossKeys.

CrossKeys Systems Corporation is a public company whose common shares are listed for trading on NASDAQ (CKEY) in the United States and on The Toronto Stock Exchange (CKY) in Canada. CrossKeys, its logo and CrossKeys Resolve are registered trademarks of CrossKeys Systems Corporation. All other trademarks are the property of their respective holders and are acknowledged by CrossKeys Systems Corporation.