PHOENIX, AZ - March 21, 2001 - Today at Pulver.com's Voice on the Net (VON), Indigo Software announced its commitment to the CommWorks^® Compatible program for IP telephony vendors. The program is an initiative from CommWorks Corporation, a wholly owned subsidiary of 3Com Corporation (NASDAQ: COMS) and a leading provider of carrier-class IP telephony equipment.

The program showcases IP telephony vendor solutions that are technically compliant with the CommWorks architecture, the company's flexible, open system for the delivery of enhanced voice and data services through dial, wireless, broadband and narrowband access.

CommWorks IP telephony deployments are carrying more than 230 million minutes of voice traffic per month for service providers in North America, Europe and Asia, and have now exceeded 1.3 billion minutes of total voice traffic worldwide. These service providers use the IP telephony solution from CommWorks to offload voice traffic from the circuit-switched public switched telephone network (PSTN) to more efficient IP networks, and to introduce new and enhanced telephony services to their customers.

Ten leading providers of hardware and software for the IP telephony market will participate in the first round of CommWorks Compatible testing. These companies include Convedia Corporation; HearMe; Indigo Software; Mediatrix Telecom, Inc.; NextTone Communications; Pingtel; 3Com Corporation; Ubiquity Software Corporation; VegaStream, Ltd.; and Voyant Technologies, Inc.

"At Indigo and CommWorks we share a similar vision of a new communications network. This cooperation will allow a faster time to market for a myriad of new SIP-based applications," said Emmanuel Bertrand, CEO and CTO of Indigo Software.

"Interworking and mediation among products and technologies is essential for the widespread deployment and acceptance of IP telephony," said Irfan Ali, president, CommWorks Corporation. "The CommWorks Compatible program targets technical compliance among vendors as a critical component in ensuring the success of IP telephony and in building a new class of telecommunication services."

"A program of this magnitude and scope will allow us to guarantee interoperability between leading vendors and thus lend confidence to the market for our SIP products," added Edward Keegan, Head of Business Development at Indigo Software.

The CommWorks Compatible program includes two levels of testing. Components Testing (Level 1) assures that products are functionally and technically compatible with CommWorks products. Solutions Testing (Level 2) testing assures that the products properly operate as part of a system of specified products from CommWorks and third-parties to perform a specific function or address a specific business need.

About Session Initiation Protocol (SIP)

An Internet Engineering Task Force (IETF) standard, SIP is an open, Internet-genuine protocol for establishing and managing multi-party, mixed-media sessions over converged networks. SIP enables the creation and deployment of feature-rich services that go far beyond simple VoIP calls. More information about SIP can be found at http://www.cs.columbia.edu/sip

About Indigo Software

With operations in both the US and Europe, Indigo Software is a forward-thinking software developer, architecting new Internet communications solutions for a broad range of service providers, including ISPs, communications ASPs, IP carriers and Next-Gen operators. Capitalizing on its award-winning, expandable communications software framework, Indigo provides a unique ensemble of Internet-infrastructure software components based on Session Initiation Protocol (SIP) and other Internet-genuine technologies sharing SIP's endowments. Devising unprecedented communications software solutions for converged networks, Indigo gives an ever-expanding service providers market the power to transform the experience of integrated communications for a generation of customers with Internet savvy.
http://www.indigosw.com

About CommWorks Corporation

CommWorks, a 3Com Company, supplies network service providers around the world with access infrastructures and IP services platforms that open new business opportunities and help them establish unique positions in a competitive marketplace. With flexible multi-service hardware platforms and modular software components, the comprehensive CommWorks architecture makes it possible for service providers to integrate their existing infrastructures with innovative technologies to deliver an array of next-generation IP-based enhanced services to their customers. For further information, visit www.commworks.com

About 3Com Corporation

3Com simplifies how people connect to information and services through easy-to-use, connectivity products and solutions for consumers and commercial organizations. The company also provides access infrastructures and IP services platforms for network service providers. For further information, visit www.3com.com or the press site at www.3com.com/pressbox.

For more information :

Edward Keegan Head of Business Development +32 2 235 09 45 edward@indigosw.com

Steven M. Ostrowski CommWorks Corporation A 3Com Company 1 (847) 342 6304 steven_m_ostrowski@3com.com

3Com and CommWorks are registered trademarks of 3Com Corporation. All other company and product names may be trademarks of the respective companies with which they are associated.

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March 21, 2001 - SIP Solutions Developer Indigo Software Joins Commworks'
New Compatibility Program for IP Telephony Equipment Vendors