Leading Technology Solutions Provider PC Mall Joins AltiGen Partner Network

SAN JOSE, CA--(Marketwire - July 29, 2009) - AltiGen Communications, Inc. (NASDAQ: ATGN), a leading provider of 100 percent Microsoft-based VoIP business phone systems and Unified Communications solutions, is pleased to announce the addition of PC Mall, Inc. (NASDAQ: MALL) to its partner network. Founded in 1987, PC Mall is a rapid response supplier of technology products, services and solutions to business, government and educational institutions. In addition to providing a comprehensive suite of IT products via partnerships with industry leaders such as Microsoft, Hewlett Packard, Cisco, Apple, Intel, IBM and others, PC Mall also offers strategic planning, needs assessment, solution design, product acquisition/e-procurement, project management, post installation support and maintenance, systems refresh programs and recycling and disposal services to commercial and public sector customers.

"With the increasing interest among mid-market and enterprise (MME) organizations in unified communications capabilities, more and more of our clients are seeking UC solutions that leverage their investment in Microsoft infrastructure," stated Gertrud Pillay, Vice President of a PC Mall Marketing subsidiary. "AltiGen's Microsoft-based VoIP and Unified Communications platform is the perfect compliment for both Microsoft Exchange 2007 and Office Communications Server."

"In today's economic climate, organizations large and small, public and private are seeking powerful, yet practical communications technologies which deliver rapid return-on-investment coupled with long term investment protection," noted Christopher Swadish, Vice President of a PC Mall Services subsidiary. "AltiGen's Microsoft-based, software-centric architecture addresses these two critical requirements with elegance and efficiency."

"We are excited to be collaborating with PC Mall in bringing AltiGen's Microsoft-based VoIP and Unified Communications solutions to both public and private sector organizations," stated Jeff Kays, AltiGen's Vice President of Business Development. "With over $1.25 billion in annual sales revenues, extensive expertise in data networking, VoIP and Unified Communications, along with broad implementation and support capabilities, PC Mall is uniquely equipped to design and deploy innovative Unified Communications solutions incorporating AltiGen and Microsoft technologies."

"With AltiGen's seamless integration for both Microsoft Exchange and Office Communications Server, the opportunity to collaborate with distinguished and diversified Microsoft Gold Certified Partners like PC Mall is a key component in our growth strategy," stated AltiGen Vice President of Sales, Mike Plumer. "We look forward to working with PC Mall in delivering our VoIP and Unified Communications solutions to organizations throughout North America."

About AltiGen Communications

AltiGen Communications, Inc. (NASDAQ: ATGN) is a leading provider of 100 percent Microsoft-based VoIP business phone systems and Unified Communications solutions. Having more than 10,000 customers around the world, AltiGen solutions are designed for high reliability, ease of use, seamless integration to Microsoft infrastructure technologies, and are built on a scalable, open standards platform. AltiGen's worldwide headquarters is in Silicon Valley, California, with international operations based in Shanghai, China. Local sales, service and support are provided by AltiGen's worldwide network of over 300 certified partners. For more information, call 1-888-ALTIGEN or visit the web site at www.altigen.com.

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, call center offerings, and AltiGen's ability to successfully grow its partnerships with Microsoft vendors. 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 AltiGen's Annual Report on Form 10-K for the fiscal year ended September 30, 2008 and all subsequent current reports on Form 8-K and quarterly reports on Form 10-Q. All forward-looking statements in this press release are based on information available to AltiGen as of the date hereof and AltiGen assumes no obligation to update these forward-looking statements.