The CyberData SIP-enabled IP Paging Gateway is a PoE (Powered over Ethernet 802.3af) and VoIP zone paging device that allows the use of legacy analog zone paging amplifiers when converting to a VOIP system. The Gateway is compatible with most SIP-based IP/PBX servers that comply with the SIP RFC 3261. The Gateway is powered via PoE 802.3af - no external power supply is needed.