📞 Elevate Your Communication Game! Built-in PoE for easy installation and reduced clutter. Experience crystal-clear calls with 1 SIP account. Manage up to 2 simultaneous calls effortlessly. Intuitive design for a smooth user experience. Engage in 3-way audio conferencing for enhanced teamwork. 2 call appearances 3-way audio The Grandstream GXP 1615 is a feature-rich SIP VoIP phone designed for professionals, offering 1 SIP account, the ability to handle up to 2 calls simultaneously, and 3-way audio conferencing. With built-in Power over Ethernet (PoE), it simplifies installation while ensuring a sleek workspace.