Features8 lines, 4 SIP accounts Supported by GDMS, which provides a central interface to configure, provision, manage and monitor Grandstream devices RJ9 headset jack that enables EHS with Plantronics headsets and built-in USB headset support Integrated Bluetooth for connecting headsets, syncing contacts, calendars and more 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 with built-in PoE Supports 5-way audio conferencing for easy conference calls Enterprise-grade protection including secure boot, dual firmware images and encryption Interchangeable faceplate for easy logo customization and data storage Integrated dual-band Wi-Fi 802.11 a/b/ g/n/ac (2.4Ghz < 5Ghz)