| Product type | IP Phone |
| Product colour | Grey |
| Handset type | Wired handset |
| Caller ID | Yes |
| Phonebook capacity | 1000 entries |
| Number of VoIP accounts | 2 |
| Answering machine | Yes |
| Call waiting | Yes |
| Speed dialling | Yes |
| Call hold | Yes |
| Call forwarding | Yes |
| Conference call | Yes |
| Redialing | Yes |
| Anonymous call | Yes |
| Anonymous call rejection | Yes |
| Full duplex | Yes |
| Call return | Yes |
| Call transfer | Yes |
| Call history | Yes |
| SIP registrar server | Yes |
| Plug and Play | Yes |
| Touchscreen | No |
| Display | LCD |
| Display diagonal | 5.84 cm (2.3") |
| Display resolution | 132 x 64 pixels |
| Backlight display | Yes |
| Speakerphone | Yes |
| Microphone mute | Yes |
| Voice codecs | AGC, AJB, CNG, G.711Mu, G.711a, G.722, G.723.1, G.726, G.729, G.729A, OPUS, PLC, VAD, iLBC |
| Comfort noise generation (CNG) | Yes |
| Packet loss concealment (PLC) | Yes |
| Ethernet LAN | Yes |
| Wi-Fi | No |
| Bluetooth | No |
| Ethernet LAN interface type | Fast Ethernet |
| Ethernet LAN data rates | 10,100 Mbit/s |
| Quality of Service (QoS) support | Yes |
| DHCP client | Yes |
| Networking standards | IEEE 802.1Q, IEEE 802.1p, IEEE 802.1x, IEEE 802.3af |
| Ethernet LAN (RJ-45) ports | 2 |
| RJ-9 ports quantity | 2 |
| DC-in jack | Yes |
| Sustainability compliance | Yes |
| Sustainability certificates | RoHS, REACH |
| Power over Ethernet (PoE) | No |
| AC adapter input voltage | 100 - 240 V |
| AC adapter output voltage | 5 V |
| AC adapter output current | 0.6 A |
| Power consumption (typical) | 3 W |
| Operating temperature (T-T) | -10 - 50 °C |
| Operating relative humidity (H-H) | 10 - 95% |
| Width | 188 mm |
| Depth | 189 mm |
| Height | 162 mm |
| Package width | 213 mm |
| Package depth | 210 mm |
| Package height | 103 mm |
| Number of handles included | 1 pc(s) |
| Mounting kit | Yes |
| Ethernet cable | Yes |
| Handset | Yes |
| Quick start guide | Yes |
| Description |
| Yealink SIP-T31. Product type: IP Phone, Product colour: Grey, Handset type: Wired handset. Phonebook capacity: 1000 entries. Display: LCD, Display diagonal: 5.84 cm (2.3"), Display resolution: 132 x 64 pixels. Voice codecs: AGC, AJB, CNG, G.711Mu, G.711a, G.722, G.723.1, G.726, G.729, G.729A, OPUS, PLC, VAD, iLBC. Ethernet LAN interface type: Fast Ethernet, Ethernet LAN data rates: 10,100 Mbit/s, Networking standards: IEEE 802.1Q, IEEE 802.1p, IEEE 802.1x, IEEE 802.3af |
