The GXV3500 is an excellent IP video encoder + decoder + public announcement system 3-in-1 combo device. It features cutting edge H.264 real-time video compression for analog video as well as IP video decoding with excellent image clarity. It offers industry leading SIP/VoIP for 2-way audio, video streaming to mobile phones and video phones, integrated PoE, a large pre-/post-event recording buffer, and advanced security protection. Its integration of comprehensive peripherals including microphone input, alarm control and TV/audio output allows the device to also function as a powerful and flexible voice/video public announcement system using microphones, IP phones, or IP video phones. The GXV3500 can be managed with GSurf, Grandstream's advanced and intuitive video management software that controls up to 36 cameras simultaneously. It offers an HTTP API and is fully compliant with ONVIF standard. The GXV3500 is an advanced first-of-its-kind IP video encoder + decoder + public announcement system 3-in-1 combo product for professional surveillance and security monitoring applications.