The CyberData SIP-enabled IP Version 2 Ceiling Speaker is the latest in IP technology. This Power over Ethernet (PoE 802.3af) 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.