3 lines, 6 SIP accounts, up to 3 call appearances Supported by GDMS which provides a centralized interface to configure, provision, manage and monitor Grandstream devices Electronic Hook Switch (EHS) support for Plantronics, Jabra, and Sennheiser headsets Full-duplex speakerphone with HD audio to maximize audio quality and clarity Equipped with noise shield technology to minimize background noise Dual switched autosensing 10/100/1000 Mbps Gigabit Ethernet ports Supports 5-way audio conferencing for easy conference calls Enterprise-level protection including secure boot, dual firmware images, and encrypted data storage Swappable faceplate to allow for easy logo customization