8 Lines, 4 SIP accounts Supported by GDMS which provides a centralised interface to configure, provision, manage and monitor Grandstream devices  RJ9 headset jack allowing EHS with Plantronics headsets, and integrated USB Headset support  Full-duplex speakerphone with HD audio to maximise audio quality and clarity  Equipped with noise shield technology to minimise background noise Dual switched auto-sensing 10/100/1000 Mbps Gigabit Ethernet ports with integrated PoE  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 customisation  Integrated dual-band Wi-Fi 802.11 a/b/g/n/ac (2.4GHz & 5GHz)