Black, compact, and ready for a hotel room without looking out of place. The GHP621 gives you six programmable keys, ten speed-dial keys, and an HD handset speaker over two SIP lines. Powered by the included adapter or a USB Type-C charger — no hunting for a proprietary brick. One 100 Mbps PoE port handles data. Full-band OPUS codec with jitter-resilience that tolerates up to 30% packet loss before callers notice. Desktop or wall-mounted. Swappable faceplate keeps your branding front and centre
| brand | Grandstream |
| model | GHP621 |
| sip_lines | 2 |
| programmable_keys | 6 |
| speed_dial_keys | 10 |
| connectivity | 100 Mbps Ethernet with PoE |
| power_options | PoE, power adapter, USB Type-C |
| codec | Full-band OPUS |
| conferencing | 3-way audio |
| hac | 1 |
| security | Secure boot, dual firmware images, encrypted data storage |
| colour | Black |
| mounting | Desktop or wall-mounted |
| category | VoIP Devices & Accessories |
