Witness Systems Impact 360 Now Rated ''Avaya Compliant''; Workforce Optimization Solution Helps Increase Customer Satisfaction, Now is Compatible with Avaya Proactive Contact 3.0 Application.

ATLANTA -- Witness Systems (NASDAQ: WITS), a leading global provider of workforce optimization software and services, today announced that its Impact 360(TM) Workforce Optimization solution is compliant with key contact center solutions from Avaya (NYSE:AV), a leading global provider of business communications applications, systems and services.

In addition to reducing costs associated with staffing, hiring and training in the contact center, the packaged Impact 360 Workforce Optimization solution powered by Avaya helps increase customer satisfaction and drive revenue growth. The solution now is compliance-tested by Avaya for compatibility with Avaya Proactive Contact 3.0. An integrated part of the Avaya Customer Interaction Suite, Avaya Proactive Contact includes the world's most accurate predictive dialer, call progress analysis tools, proactive health monitoring and management, unified administration and robust dialing algorithms - helping businesses reach customers more quickly and profitably.

"The ease of testing between Impact 360 and the new release of Avaya's predictive dialer is a testament to how well the Witness Systems solutions integrate with Avaya products," said John Bourne, senior vice president of global product management, Witness Systems. "Businesses will benefit from Witness Systems' support of new features in Proactive Contact 3.0 - such as the computer telephony integration (CTI)-based dialing option - because it provides a cost-effective solution to help them maximize their communications infrastructure."

Witness Systems is a Premier member of the Avaya DeveloperConnection Program - an initiative to develop, market and sell innovative third-party products that interoperate with Avaya technology and extend the value of a company's investment in its network. As a member of the program, Witness Systems is eligible to submit products for compatibility testing by the Avaya Solution Interoperability and Test Lab in Lincroft, N.J. There a team of Avaya engineers develops a comprehensive test plan for each application to verify whether it is Avaya compliant. Doing so ensures businesses can confidently add best-in-class capabilities to their network without having to replace their existing infrastructure--speeding deployment of new applications and reducing both network complexity and implementation costs.

"By offering compliance testing to the many innovative companies like Witness Systems who are members of our DeveloperConnection program, Avaya promotes fully interoperable solutions that help businesses unleash powerful new possibilities," said Eric Rossman, vice president, developer relations and technical alliances, Avaya. "They are able to use Intelligent Communications to connect employees and customers to information from wherever they are, over whatever device they have available - getting more out of their multivendor network and delivering new value to their bottom line."

About Avaya

Avaya Inc. designs, builds and manages communications networks for more than 1 million businesses worldwide, including over 90 percent of the FORTUNE 500(R). Focused on businesses large to small, Avaya is a world leader in secure and reliable Internet protocol (IP) telephony systems and communications software applications and services.

Driving the convergence of voice and data communications with business applications - and distinguished by comprehensive worldwide services - Avaya helps customers leverage existing and new networks to achieve superior business results. For more information visit the Avaya website: www.avaya.com. For more information on the Avaya DeveloperConnection Program, visit www.devconnectprogram.com.

About Witness Systems

Witness Systems (NASDAQ: WITS) is the worldwide leader in software and services that help businesses capture customer intelligence and optimize their workforce performance. The company's Impact 360(TM) solution features quality monitoring, compliance and IP recording, workforce management, performance management and e-learning. Primarily deployed in contact centers - as well as the remote, branch and back offices of global organizations - the workforce optimization solution captures, analyzes and enables users to share and act on cross-functional information across the enterprise. With Impact 360, organizations can improve interactions and the underlying back-office processes that enhance the customer experience and build customer loyalty. For more information, visit us at www.witness.com.

Cautionary Note Regarding Forward-looking Statements: Information in this release that involves Witness Systems' expectations, plans, intentions or strategies regarding the future are forward-looking statements that are not facts and involve a number of risks and uncertainties. They are identified by words such as "will," "anticipates," "expects," "intends," "plans," "believes," "estimates," and similar expressions. These statements are based upon information available to Witness Systems as of the date of this release, and the company assumes no obligation to update any such forward-looking statement. Forward-looking statements believed true when made may ultimately prove to be incorrect. These statements are not guarantees of future performance and are subject to risks, uncertainties and other factors, some of which are beyond our control and may cause actual results to differ materially from our current expectations. Some of the factors that could cause actual future results to differ materially from current expectations include fluctuations in customer demand and the timing of orders; the company's ability to manage its growth; the risk of new product introductions and customer acceptance of new products; the rapid technological change which characterizes the company's markets; the risks associated with international sales as the company expands its markets, including the risks associated with foreign currency fluctuations; the ability of the company to complete and integrate successfully any acquisitions or investments it may make; and the ability of the company to compete successfully in the future, as well as other risks identified under the caption "Management's Discussion and Analysis of Financial Condition and Results of Operations" in the company's Form 10-K for the year ended December 31, 2005 and its Form 10-Q for the quarter ended March 31, 2006, as filed with the Securities and Exchange Commission. Additional risks that could cause actual future results to differ materially from current expectations include the risk of management distraction and other consequences that might result from the review of certain option grants and option granting practices described in the Current Report on Form 8-K filed by the Company on August 11, 2006 and related developments.

Witness, Impact 360, Improve Everything and the Witness logo are the trademarks (registered or otherwise) of Witness Systems, Inc. protected by laws of the U.S. and other countries. All other trademarks mentioned in this document are the property of their respective owners.