AltiGen’s ExtensionAnywhere mobile technology coupled with Multi-Tech Systems’ portfolio of CallFinder cellular gateways offer increased cost savings for companies with remote and mobile workers

Fremont, California, September 28, 2007 — AltiGen® Communications, Inc. (NASDAQ: ATGN), a pioneering manufacturer of VoIP business phone systems and call center solutions, and Multi-Tech Systems, Inc., a leading manufacturer of products that connect voice and data over IP networks, are teaming up to deliver a complete mobile communications solution.By bundling the Multi-Tech CallFinder® GSM and CDMA cellular gateways with the AltiGen Office and MAX1000 series of VoIP Business Phone Systems, the companies seamlessly bridge an AltiGen phone system to a cellular network. The AltiGen - Multi-Tech Systems product combination enables businesses to save telecommunications costs by taking advantage of lower cost cellular networks for routing calls rather than traditional landlines. By utilizing the AltiGen ExtensionAnywhere™ feature to route calls through a cellular network, the CallFinders will provide toll-free calling between headquarters and cell phones in the field. The CallFinder gateways can also provide back-up communications, including emergency 911 services, in the event of central office public switched telephone network (PSTN) failure.

According to Dan Nelson, Vice President of