The Grandstream GHP621 is a compact IP phone designed specifically for hotel rooms and similar hospitality environments. It supports two SIP lines and connects to the network via a 10/100 Mbps Ethernet port, which allows for streamlined installation through Power over Ethernet (PoE) support, though a universal adapter is also included in the package. To ensure clear communication, the handset is equipped with an HD speaker and supports the full-band OPUS voice codec along with a jitter-resilience algorithm that maintains voice quality even with up to 30% packet loss. Its black chassis measures 21 cm in width, 8.98 cm in height, and 13.2 cm in depth, weighing 560 g. The interface is built for guest convenience, featuring 10 speed dial keys and 3 programmable keys for quick access to hotel services. You can easily manage calls using the speakerphone, conference, transfer, and hold functions, while a silent mode is available for undisturbed stays. The device is versatile enough to be placed on a desk using the included stand or mounted directly to the wall to save space.