Weatherproof vandal intercom with special SIP protocol for distress call points, such as those installed in refuge areas, with steel front plate, metal pushbutton and interior loudspeaker and microphone protective grille, large SOS letters in red, message pre-recorded call in progress, accessibility pictogram and CALL word in Braille. Bi-directional full duplex audio with acoustic echo cancellation and noise reduction. Firmware update and remote configuration via web server. 5 VDC or PoE power supply. Active call indicator LED. Remote control for door opening. Second active contact in communication or call for integration with other security systems. To install in ceiling or recessed (box not included).