The Grandstream GRP2603 is an elegantly designed 3-line carrier grade IP phone with next generation features including 4-way voice conferencing Full HD audio on both speakerphone and handset for users to communicate with maximum audio clarity, EHS support for Plantronics Jabra and Sennheiser headsets and multilingual support. Grandstream GRP2603 Features 3 Lines 3 SIP Accounts Supports GDMS to configure provisioning management and monitor Grandstream devices Electronic hook switch EHS support for Plantronics Jabra and Sennheiser headsets Full duplex speaker with HD sound for maximum sound quality and clarity Gigabit Ethernet ports 10/100/1000 Mbps switched with auto-sensing Supports 4-way audio conferencing for convenient conferencing Enterprise-grade protection, including secure boot firmware and encrypted data storage Replaced faceplate for custom logo