We have TalkSwitch 240vs 2 Lines 4 Analog/IP 12 IP Extension Small Business Phone System with Product Detail Easy to set up Phone freedom. TalkSwitch works with any analog and IP phones. Remote extensions keep you connected anywhere Expandable Requirements for configuration software: Windows Vista (32 bit) or Windows XP or Windows 2000 and minimum 256MB RAM, 160MB hard disk space and 800x600 screen resolution. . The "TalkSwitch 240vs 2 Lines 4 Analog/IP 12 IP Extension Small Business Phone System" is best product for you. We recommended TalkSwitch 240vs 2 Lines 4 Analog/IP 12 IP Extension Small Business Phone System