CosmoCom Announces Support of Siebel 7

Chicago, IL, October 1, 2001 - CosmoCom, the leading provider of IP-based contact center infrastructure to service providers, today announced its support for Seibel 7, the seventh major release of Siebel eBusiness Applications from Siebel Systems Inc., (Nasdaq: SEBL), the world's leading provider of eBusiness applications software. CosmoCom will submit the integration of its leading all-IP contact center solution CosmoCall Universe™, for validation with Siebel 7 within 90 days of general availability, providing organizations with complete eBusiness solutions that increase productivity, maximize revenue and profit, and significantly enhance customer acquisition, satisfaction, and retention.

Siebel Systems enables software vendors to easily integrate through its open, extensible, advanced Smart Web Architecture. Seibel 7 extends the reach and functionality of Seibel Systems' industry-leading suite of integrated, mulitchannel eBusiness applications, enabling organizations to translate strategy into front-line action by effectively aligning and rapidly mobilizing channels, employees and partners. Siebel 7 is the only solution that allows organizations to manage, synchronize and coordinate all customer touch points across the web, call center, field sales and service personnel, and partner channels.

CosmoCall Universe is the complete call center solution which, when integrated with Siebel 7, provides a total customer interaction experience. The integration will be in the framework of CosmoConnector, CosmoCom's CRM integration enabler, and will include customer-agent communication through all forms of contact media and provide customer service representatives with a unified desktop with all customer data and history. The integration of CosmoCall Universe and Siebel 7 makes this customer interaction process seamless to both customers and agents.

"Businesses will benefit from the complete and comprehensive eBusiness solution delivered through the integration of CosmoCall Universe and Siebel 7," said Ari Sonesh, CEO of CosmoCom. "The overall multichannel eBusiness solution will enable our customers to reduce the costs of acquiring, servicing and supporting their customers while running a complete state-of-the-art contact center."

CosmoCall Universe is a new generation call center technology that connects businesses and their customers worldwide in multimedia, multi-channel call centers that include telephone, voice and video over the Internet, keyboard chat, IVR, e-mail, voice mail, and fax. CosmoCom's totally IP-based call center software allows customer service representatives to be located anywhere, and supports high capacity and high availability for the mission critical applications of service providers and large-scale businesses.

"CosmoCom's CosmoCall Universe Platform is a key complement to Siebel eBusiness Applications in Multimedia IP-based Call Centers," said Mercedes Ellison, Vice President of Alliances at Siebel Systems, Inc. "CosmoCall Universe offers a complete Web and telephone-based multimedia contact center and relationship management system that relies solely on software and IP-ACD (automatic call distributor) technology. By leveraging the CosmoCall Universe Platform, our joint customers can be freed from the costly circuit-switched telephone equipment (PBX) or computer telephony integration (CTI) middleware typical of most call center technology."

About CosmoCom
CosmoCom is the leading provider of all-IP, universal access contact center platforms. CosmoCom's flagship product, CosmoCall Universe™, is a carrier-class system enabling service providers to offer, on a hosted basis, mission critical contact center applications to their clients. CosmoCall Universe supports multichannel customer interactions via telephone and internet, live and message-based, fixed and wireless - in one high capacity, high availability, multi-tenant platform. Headquartered in Melville, New York, with offices and distribution partners throughout the world, CosmoCom has received an array of industry awards. Market analysts Frost and Sullivan recently reported that CosmoCom's large and growing installed base represents a 50% share of the US IP-ACD market. For more information about CosmoCom, please visit www.cosmocom.com .

About Siebel Systems
Siebel Systems, Inc. (Nasdaq: SEBL) is the world's leading provider of eBusiness applications software. Siebel Systems provides an integrated family of eBusiness applications software, enabling multichannel sales, marketing, and customer service systems to be deployed over the web, call centers, field, reseller channels, retail, and dealer networks. Siebel Systems' sales and service facilities are located in more than 37 countries. For more information, please visit Siebel Systems' Web site at www.siebel.com.