The Cisco SPA508G supports LDAPv3 Corporate Directory Search, Cisco XML-based Corporate Directory and features a customizable logo and screensaver. SIP 3rd party call control for server based applications and Cisco XML API support for advanced applications is also available. The Cisco SPA508G supports for the standard SIP2.0 protocol, as well as Cisco's proprietary SPCP (Smart Phone Control Protocol), a derivative of Cisco's SCCP (Skinny) call control protocol which is used on the Cisco UC500 platform. The Cisco SPA508G is part of the Cisco Small Business Pro product family. Configuration, provisioning, and ongoing support are the sole responsibility of the purchaser. Cadiz3 provides no warranty, support, or liability in relation to the setup or integration of these devices into any phone system. If you are unsure whether this device is compatible with your environment, we recommend consulting with your VoIP provider or system administrator prior to purchase.