The Algo 8198 IP PoE+ Ceiling Speaker is a SIP compliant and multicast capable PoE+ network audio device for live voice paging, alerting, announcements and emergency notification. Multiple satellite speakers reduces required network ports and cable drops. The Algo 8198 SIP PoE+ Ceiling Speaker can operate individually or supports up to three daisy-chained Algo 1198 Satellite Speakers (see images). Daisy-chain requires directly wiring speakers to each other (not through network). The Algo 8198 features SIP paging extensions, alert/ring extensions and multicast scalability for voice paging, music and audio broadcasts. The Algo 8198 requires the installer to connect the unit to PoE+ power for full capability. Extensions can be registered with most any premise or hosted Communication Server supporting 3rd party SIP endpoints. Wideband G.722 codec support provides optimum speech clarity and intelligibility in an HD Voice environment. Voice paging and notification announcements are easier to understand, particularly in noisy environments. For additional functionality, consider adding the Algo 1202 illuminated call button to your order. The recommended installer should be familiar with configuration and programming of Voice over IP devices via web-based graphical user interface or provisioning. Can be ceiling mounted in drop tile, down rod, or steel cable (none included). Order the optional Algo 8188MEM for humid environments. While this product will operate at lower power on a standard PoE network, it requires PoE+ IEEE (802.3af/at) 48V for full functionality and power output. If PoE+ is not available, use PoE+ Injector. Satellite speakers WILL NOT work without PoE+ power to the 8198. Does not support direct power connection - daisy chain connections only. See manufacturer's website for specifications, new features, and required firmware updates. A basic understanding of computer networking and Voice over IP experience is recommended.