A reliable IP phone for small business users, the GXP1620/1625 delivers a suite of powerful VoIP features in an easy-to-use fashion with a modern design. The GXP1620/1625 offers support for up to 2 lines and features full HD audio on both the speaker and handset to allow users to communicate with the utmost clarity. The GXP1625 features built-in Poe while the GXP1620 does not. Additional features include 3-way conferencing to maximize productivity, 3 XML programmable soft keys for customization and EHS support for Plantronics headsets. These features allow the GXP1620/1625 to be a high-quality and easy-to-use small business IP phone. As all Grandstream IP phones do, the GXP1620/1625 features state-of-the-art security encryption technology (SRTP and TLS). The GXP1620/1625 supports a variety of automated provisioning options, including zero-configuration with Grandstream's UCM series IP PBXs, encrypted XML files and TR-069, to make mass deployment extremely easy.