When: Wednesday, July 25, 2007 2:00 PM Pacific Time (5:00 PM Eastern Time)

Who: Gilbert Hu, Chairman and Chief Executive Officer, Phil McDermott, Chief Financial Officer and Jeremiah Fleming, President and Chief Operating Officer

What: AltiGen Communications, Inc. (Nasdaq: ATGN - News) will host a teleconference to announce fiscal 2007 third quarter results.

How: Dial (800) 862-9098 (domestic) or (785) 424-1051 (international) to listen in to the call. The conference call ID is “AltiGen.” A live Webcast will also be made available at www.altigen.com. A telephonic replay will be available approximately one hour after the call and last for seven days. To access the replay, dial (402) 220-4948. A Web archive will be made available at www.altigen.com for 90 days following the call's conclusion.