The GXV3500 is an IP video encoder and decoder that uniquely features a built-in public announcement system to offer a 3-in-1 combination device. The device decodes IP video streams to analog video in order to allow IP cameras to be used on an analog network and encodes analog video to allow analog cameras to be used in an IP network. Like all Grandstream IP Video Surveillance products, the GXV3500 includes built-in PoE.