The CyberData SIP-enabled VoIP V2 Loudspeaker Amplifier is for use with Singlewire's paging and emergency notification software InformaCast® or InformaCast CK. This PoE-powered device hooks up easily to new and existing Singlewire installations.With up to 25 watts of driving power (802.3at), the Amplifier provides direct drive of a standard Horn speaker and supports a line out connector for connection to an external amplifier. The interface is compatible with most SIP-based IP PBX servers that comply with the SIP RFC 3261. For non-SIP environments, the Paging Amplifier can be configured to listen to multicast address and port number combinations to form paging zones. This new version of our popular Loudspeaker Amplifier, which includes the NEMA enclosure (NEMA Type 3R / IP42), can be used in some outdoor environments, and is perfect for noisy and industrial environments such as warehouses and machine shops.