Polycom SoundPoint IP 335 Power Supply Not Included Works with Ringcentral vonage voip.ms Asterisk PBX and FreePBX Polycom HD Voice technology including support of G.722 wideband codec Polycom Acoustic Clarity Technology 2 and systems design optimized for Polycom HD Voice technology Interoperability with leading IP PBX and Softswitch platforms Advanced functionality including shared lines busy lamp field threeway conferencing and XML microbrowser Integrated IEEE 802.3af Power over Ethernet (PoE) support (Class 2) NO power supply since this phone supports POE. Ideal for call centers and cubicles The SoundPoint IP 335 features 2 lines and is SIP trunking capable It supports PoE power over Ethernet Polycom HD Voice for high quality conversations Two Lines Integrated PoE 10/100 Ethernet switch 102 x 33 pixel backlit grayscale graphical LCDColor: 478861