The CyberData SIP Speaker is the latest in IP technology. This Power over Ethernet (PoE 802.3af/802.3at) VoIP mass notification device has network-controlled speaker volume, simultaneous SIP and priority-based Multicast streaming, and integrates with both the CyberData Wall Mount and the CyberData Wall Mount Clock Kit. The speaker is compatible with most SIP-based IP PBX. In a non SiP environment, the speaker is capable of broadcasting audio through Multicast. Its small footprint and low height allows the speaker to be discreetly mounted almost anywhere.The CyberData SIP Speaker is the latest in IP technology. This Power over Ethernet (PoE 802.3af/802.3at) VoIP mass notification device has network-controlled speaker volume, simultaneous SIP and priority-based Multicast streaming, and integrates with both the CyberData Wall Mount and the CyberData Wall Mount Clock Kit. The speaker is compatible with most SIP-based IP PBX. In a non SiP environment, the speaker is capable of broadcasting audio through Multicast. Its small footprint and low height allows the speaker to be discreetly mounted almost anywhere.