Used for surveillance, DCS-3511 Onvif-compliant IP camera features 720p (1 MP) resolution; automatic IR filter for day/night operation; 2.8–12 mm, F1.4 DC iris varifocal lens with 78° to 23° field of view; and 2-way audio with built-in microphone. PoE enables single-cable installation, while included D-ViewCam video management software supports up to 32 D-Link cameras. Along with various recording methods, other features include video motion detection, DIO, and multicast streaming support.