3-Line Essential IP Phone Designed for Mass Deployment and Easy Management
The GRP2604 features 5-way voice conferencing to maximize productivity, integrated PoE (GRP2604P) and is supported by Grandstream’s Device Management System (GDMS). 

• 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 with integrated PoE (GRP2604P only)
• 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