AddPac GSM SOHO gateway solution provides GSM VoIP gateway function from 1 Port up to 16 Ports. AddPac GSM SOHO gateway provides high-performance IP to GSM gateway solution including IP-routing services for small enterprise, and other public offices. This product uses the state-of-art technology voice compressed algorithm and unique QoS algorithm of AddPac to maintain the maximum voice quality under fast internet line and slow internet line as well. This product is designed based on high performance RISC CPU + DSP structure; supports upgraded speed, the best quality product, offers various user-friendly functions, manufactured at low cost and this product gives high performance for its price. AddPac GSM SOHO gateway also supports SIP, H.323 dual VoIP signaling protocol, various voice codec(G.711, G.726, G.729, G723.1).