The IP-A1PG is a PoE-powered Gateway Unit that integrates multiple IP Audio devices by converting audio from Video Management Systems using ONVIF or SIP voice from SIP phone systems into multicast audio streaming. It can also transmit built-in sound source or input audio as multicast audio streaming. Moreover, the event broadcasting triggered by control input, scheduler or remote API (HTTP/HTTPS) as well as the command set that sends multiple HTTP/HTTPS commands simultaneously are also available.