Cisco Systems 7961G Unified IP VOIP Office Phone (Cisco CallManager Required). A higher-resolution, graphical 4-bit grayscale display (320 x 222). Support for both IEEE standard 802.3af inline power and Cisco inline power. A full-featured handset with six programmable line and feature buttons. Four interactive softkeys to help guide users through various call features and functions. PoE (Powered over Ethernet) by design - Power Supply Not Included. Cisco CallManager Required.