TalkSwitch 244vs 2 Lines 4 Analog/IP 12 IP Extension 4 VoIP Trunk Small Business Phone System Easy to set up Phone freedom. TalkSwitch works with any analog and IP phones. Remote and external IP 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.