The CyberData Emergency Intercom is a Power over Ethernet (PoE 802.3af) and VoIP (Voice over IP) two-way communication device used in an area where either an emergency panic button or two-way priority communication is required. The Intercom is compatible with most SIP-based IP PBX servers that comply with RFC 3261. The VoIP Intercom can be configured as a Night Ringer with two SIP extensions. One extension can be assigned to a page group for auto answer paging. The second extension can be assigned to a “First-to-Answer” Night Ring group with IP.