Call Center Magazine Editors Recognize AltiGen for IP Call Center Product Innovation, Achievement

FREMONT, CALIFORNIA, (April 25, 2005) — AltiGen® Communications, Inc. (NASDAQ: ATGN), a leading manufacturer of VoIP telephone systems and VoIP call center solutions, announced today that its AltiContact™ Manager 5.0 (ACM) product was named “Best of Show” at CMP’s Call Center Demo and Conference Dallas 2005. The “Best of Show” designation is awarded to products demonstrated at Call Center Demo to be “ especially innovative” by Call Center Magazine editors.

The customer-proven AltiContact™ Manager 5.0 (ACM) is a suite of powerful and affordable IP contact center solutions built on the AltiServ IP-PBX communication foundation. ACM adds advanced routing and contact management solutions designed to offer enhanced support for inbound, outbound or blended customer contact environments. Businesses can cut operating costs and boost employee productivity with ACM’s skills-based routing, remote agent and multi-site support, centralized call recording, call detail reporting, and out-of-the-box integration with popular CRM applications, including Microsoft® CRM.

Researchers and market-watchers agree that VoIP is gaining wider adoption and acceptance among businesses of all sizes. The percentage of companies using VoIP technology jumped from 3 percent in 2003 to 12 percent in 2004, according to market researcher In-Stat/MDR. Similarly, a Deloitte & Touche study asserts that two-thirds of global businesses will deploy VoIP to the desktop by 2006.

“ As uptake of IP technology continues among mainstream businesses, AltiGen’s two objectives remain unchanged: making advanced telephony capabilities affordable to small and mid-sized companies and constantly updating our product offerings to reflect IP evolution and innovation — such as E911 support. AltiGen is dedicated to keeping our customers one step ahead of the VoIP curve ,” said Gilbert Hu, President and CEO, AltiGen Communications.

Call Center Demo and Conference Dallas 2005, attended by more than 1,400 call center professionals, offered more than three dozen sessions, including customer-focused case studies, educational tutorials, hands-on demos and more. Call Center Demo & Conference 2006 will take place next February in its new location of Austin, Texas.

About AltiGen Communications
AltiGen Communications, Inc. is a leading manufacturer of IP phone systems and Call Center solutions that save businesses time and money, and create operational efficiencies by taking advantage of cutting-edge voice and data convergence technologies. AltiGen's AltiServ® VoIP-PBXs and Call Centers have been proven in over 17,000 installations around the globe, and have been recognized for excellence with more than 40 industry awards since 1996. Focused on small to mid-sized and multi-site businesses, AltiGen customers benefit from integrated solutions that protect their existing network and telephony investments, while providing unique new ways to be more competitive and productive.

Each AltiServ phone system is a complete IP-PBX business telephone system that includes automated attendants, simultaneous support for both analog and IP extensions, single and multi-site operator consoles, superior voice mail, comprehensive call detail reporting (CDR), unified messaging, and Gold Certified Microsoft® CRM integration.

For businesses with contact centers or call center needs, AltiServ Contact Center (ACC) is a comprehensive call center module included with all AltiGen systems. For more advanced implementations, AltiContact Manager (ACM) offers a multi-media contact center solution that includes centralized call recording, advanced ACD routing, voicemail and IVR. ACM also offers an advanced call router with answering scripts, call distribution based on call priority and agent skill levels, real-time statistics and call detail reporting software, as well as customized agent and supervisor interfaces to satisfy the needs of an advanced call center.

For more information, call 1-888-ALTIGEN or visit the Web site at www.altigen.com .

About CMP Media LLC
CMP Media LLC (http://www.cmp.com) is a leading integrated media company providing essential information and marketing services to the entire technology spectrum -- the builders, sellers, and users of technology worldwide. Capitalizing on its editorial strength, CMP is uniquely positioned to offer marketers comprehensive, integrated media solutions tailored to meet their individual needs. Its diverse products and services include newspapers, magazines, Internet products, research, direct marketing services, education and training, trade shows and conferences, and custom publishing.

Safe Harbor Statement
This press release contains forward-looking statements within the meaning of Section 21E of the Securities Exchange Act of 1934, including, without limitation, statements regarding the continued market acceptance of our Voice over IP telephone systems, and call center solutions in the small to midsize marketplace, and our ability to deliver award winning solutions which includes enhanced support for inbound, outbound or blended customer contact environments. These statements reflect management's current expectation. However, actual results could differ materially as a result of unknown risks and uncertainties, including but not limited to, risks related to AltiGen's limited operating history. For a more detailed description of these and other risks and uncertainties affecting AltiGen's performance, please refer to the Company's most recent 10K for the year ended September 30, 2004. AltiGen assumes no obligation to update the forward-looking information contained in this press release.

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