Two SIP accounts, a 2.3-inch backlit monochrome screen, dual 10/100 ethernet with PoE, integrated dual-band 802.11ac Wi-Fi 5, and Bluetooth 4.2 for headsets. The T31W is the cheapest current Yealink with built-in Wi-Fi — the right pick when ethernet at the desk is not an option.
The T31W is what you buy when the desk needs a phone and pulling ethernet would cost more than the phone itself. Conference rooms in older buildings, hotel guest rooms where the rewiring estimate scares everyone, a third-floor satellite office without a network drop — for all of those, the T31W is the cleanest answer. Built-in dual-band Wi-Fi 5 means you connect it to the same wireless network your laptops use and it just works.
The Bluetooth 4.2 radio is the bonus feature. You can pair a Bluetooth headset directly — no EHS adapter, no USB dongle. For a hotel concierge or a reception desk where staff move around with calls, that is genuinely useful. The Wi-Fi and Bluetooth radios on this phone work simultaneously, so there is no trade-off.
Where it gives up ground: ethernet is still 10/100 (no gigabit on this chassis), and the screen is still monochrome. If you also want gigabit, the T31G covers that without Wi-Fi. If you want Wi-Fi plus a color screen, the next stop is the T54W at $239 — a totally different price tier. The T31W is the sweet spot for 'just give me Wi-Fi on a basic two-line phone.'
| Display & user interface | |
| Display | 2.3-inch 132×64 backlit graphical LCD |
| Line keys | 2 line keys with dual-color LEDs |
| Soft keys | 4 context-sensitive soft keys |
| Navigation | 5-way nav, dedicated function keys |
| VoIP & SIP | |
| SIP accounts | Up to 2 SIP accounts |
| Protocols | SIP v2 (RFC 3261), TLS, SRTP, STUN, BLA |
| Codecs | Opus, G.722, G.711(A/μ), G.729AB, G.726, iLBC |
| Provisioning | FTP/TFTP/HTTP/HTTPS, PnP, TR-069, RPS |
| Audio | |
| HD voice | HD handset and HD speakerphone |
| Speaker | Full-duplex hands-free with AEC |
| Headset | RJ9 + Bluetooth 4.2 (paired headsets) |
| Connectivity | |
| Ethernet | Dual 10/100 Mbps |
| PoE | IEEE 802.3af Class 1 |
| Wi-Fi | Built-in dual-band 802.11a/b/g/n/ac (Wi-Fi 5), 2.4 + 5 GHz |
| Bluetooth | Built-in Bluetooth 4.2 for headset pairing |
| Power & physical | |
| Power | PoE 802.3af, or 5V/0.6A adapter |
| Dimensions | Approximately 209 × 184 × 28 mm |
| Wall mount | Yes |
| In the box | |
| Included | T31W handset, base, curl cord, ethernet cable, stand, provisioning card |
| Not included | Power adapter (PoE or Wi-Fi-only powered preferred) |
Plug the T31W into PoE and ethernet. About a minute later it has registered to your extension. Same auto-provisioning flow as every other supported phone — no SIP credentials to type, no firmware to chase.
Boot, fetch config from our provisioning server, register, ready. About one minute on a normal connection.
2 lines per phone. Each line key has a dual-color LED for status at a glance.
2 line keys + 4 soft keys mapped from the voip.army portal — BLF, paging, parking, transfer destinations.
Bringing your own? Send us the MAC, factory-reset, plug in. No charge to add it to the fleet.
Standard PoE — any 802.3af-compliant switch from the last 15 years powers the phone without an adapter.
Tested against every Yealink firmware release for T31W. We catch regressions before they reach your fleet.
Tell us how many you need and what extensions to map. We ship pre-configured next business day; you plug them in and they work.