Single-Line IP Telephony with PoE Part of Cisco Small Business IP Phone Series, the Cisco SPA922 IP Phone is a great, upgradeable option for any home office or small business using a hosted Internet telephony service, an IP PBX, or even a large-scale IP Centrex deployment. In addition to its hundreds of features, the single line can be configured as a unique phone number or extension, or can share a number that's assigned to multiple phones. Power over Ethernet (PoE) eliminates the need for an additional power source. Additional features of the Cisco SPA922 IP Phone include: Dual-switched Ethernet ports, speakerphone, caller ID, call hold, and conferencing 802.3af PoE, high-resolution graphical display, speakerphone, and a 2.5 mm headset port Support for one line with two call appearances, as well as three-way conferencing, attended call transfer, and call hold Easy station moves and shared line appearances across local and geographically dispersed locations Standard encryption protocols to provide secure remote provisioning and unobtrusive in-service software upgrades Detailed performance measurement and troubleshooting more here