Same spec as the white GHP630, but in black for rooms where a lighter finish stands out too much. 3.5-inch colour screen, HD speaker, PoE on a single cable. 10 speed-dial keys, USB Type-C for guest charging. Compact enough for a bedside table or a small reception desk
| brand | Grandstream |
| model | GHP631 |
| colour | Black |
| display | 3.5-inch colour LCD |
| connectivity | 100 Mbps Ethernet with PoE |
| sip_lines | 2 |
| speed_dial_keys | 10 |
| soft_keys | 6 context-sensitive |
| conferencing | 3-way |
| codec | Full-band OPUS |
| jitter_resilience | Up to 30% packet loss |
| usb_charging | Type-C port |
| hac_certified | 1 |
| security | Secure boot |
| management | Grandstream GDMS |
| category | VoIP Devices & Accessories |
