The Grandstream GXP1630 is a Linux-based, 3-line Gigabit IP phone designed for small businesses. It features a backlit LCD screen, dual Gigabit network ports with integrated Power over Ethernet (PoE), 8 BLF (busy lamp field) keys, and 4-way conferencing. With HD audio, multi-language support, and robust security features like SRTP and TLS.