Grandstream GRP2602, 4 SIP, 2 Lines, no PoE, Black//Supports 2 lines, and 4 SIP accountsSupported by GDMS which provides a centralized interface to configure, provision, manage and monitor Grandstream devicesElectronic Hook Switch (EHS) support for Plantronics, Jabra, and Sennheiser headsetsFull-duplex speakerphone with HD audio to maximize audio quality and clarityEquipped with noise shield technology to minimize background noiseSupports 5-way audio conferencing for easy conference callsEnterprise-level protection including secure boot, dual firmware images, and encrypted data storageSwappable faceplate to allow for easy logo customizationhttps://www.grandstream.com/products/ip-voice-telephony-carrier-grade-ip-phones/grp-series-essential-ip-phones/product/grp2602-p-w-g