San Jose, CA – January 20, 2010 - AltiGen Communications, Inc. (NASDAQ: ATGN), the leading provider of integrated Microsoft-based Unified Communications solutions, will announce its first quarter fiscal 2010 financial results after the close of regular market trading on Wednesday, January 27, 2010.  The Company will also hold a conference call to discuss the results at 2:00 p.m. Pacific Time (5:00 p.m. ET).

What:        AltiGen First Quarter Fiscal 2010 Conference Call

When:       Wednesday, January 27th at 2:00 p.m. Pacific Time (5:00 p.m. ET)

Who:         Jerry Fleming, President and Chief Operating Officer and Phil McDermott, Chief Financial Officer

How:         Dial (800) 894-5910 (domestic) or (785) 424-1052 (international) to listen in to the call.  The conference call ID is "AltiGen." A live webcast will also be made available here. A telephonic replay will be available approximately one hour after the call through January 29, 2010. To access the replay, dial (800) 695-0715 (domestic) or (402) 220-1423 (international). A web archive will be made available here for 90 days following the call's conclusion.

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.

Contacts:
Phil McDermott                                   Todd Kehrli or Jim Byers       
Chief Financial Officer                       Investor Relations                  
AltiGen Communications                    MKR Group, Inc.                   
(408) 597-9000 x161                          (323) 468-2300                                  
pmcdermott@altigen.com                  atgn@mkr-group.com