Grandstream GS-GRP2636 Gigabit POE 2 Sip Profiles 4 Lines EHS Duplex Phone is supported by GDMS which provides a centralized 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 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 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 customization. Integrated dual-band Wi-Fi 802.11 a/b/g/n/ac (2.4Ghz & 5Ghz). Specification: Bluetooth: Yes. Call Waiting: Yes. Caller ID (CID): Yes. Conference Calling: Yes. Corded or Cordless: Corded. EHS: Yes. Headset Port: Yes. LCD Backlit Display: Yes. Number SIP: Accounts/Identities6. Speakerphone: Yes. Wifi: Yes.