The Grandstream of IP telephones are versatile and feature-rich devices designed for businesses and professionals. They support SIP accounts, enabling seamless integration with VoIP systems. These telephones come with HD audio, programmable keys for customization, and advanced call-handling features like conferencing and call forwarding. They often include a sleek design, LCD screens, and PoE support for efficient power management. The GXP series is known for its reliability, user-friendly interface, and compatibility with a wide range of VoIP platforms.