The Barix Annuncicom 4000 is an audio-over-IP endpoint and gateway for intercom, paging, surveillance, and annunciation applications. It supports SIP, HTTP and RTP streaming, multiple codecs, balanced dual line-level inputs and outputs, eight relay outputs, and eight plus one digital dry-contact inputs. The device provides isolated 24 V AC/DC and PoE power inputs for redundancy, IPv4/IPv6 networking, VLAN support, and HTTPS, SRTP, and SIPS security protocols.