Eyez-On Envisalink EVL-4 IP Security Interface Module EnvisaLink 4 will allow you to receive text and email messages as well as control your Honeywell Vista and DSC security systems through the internet. The EnvisaLink 4 also provides access through a virtual keypad using an iPhone, Android or Blackberry. EnvisaLink 4 automatically seeks an IP address, no router programming required. It allows you to view the status of and even control your alarm panel through a standard web-browser or smart-phone. VOIP Friendly. Panel Compatibility Honeywell Vista Panels (Vista20P, 21iP, 15P, 10P, 128, and 250.) DSC PowerSeries (1555, 1555 MX, 1575, 5010 (832), 5020 (864), 1616, 1832, 1864)