The Barix Annuncicom AHE-YA404 is a 19-inch, 1 RU analog head-end for interfacing up to 16 two- or four-wire intercom panels with VoIP and SIP systems. It provides 25 V or 70 V constant-voltage paging output up to 50 W and 2.5 W intercom output, with one station active in intercom mode at a time. Features include 16 dry-contact inputs, SIP clients, IP audio streaming, codec support, scheduled and triggered message playback, web configuration, and 24 VDC operation.