Does the T31W really have built-in Wi-Fi (no dongle)?

Yes. The Wi-Fi 5 (802.11ac) radio is integrated into the base. No USB dongle needed. Configured from the phone's web UI or via auto-provisioning.

Does the Bluetooth work for headset call control?

Yes. Bluetooth 4.2 supports HSP/HFP for headset audio and call answer/end. Pair Jabra, Plantronics, Yealink WH-series, etc. directly.

Yealink kept the chassis at 10/100 to hit the $129 price point. If you need gigabit AND Wi-Fi on a desk phone, jump up to the T54W ($239).

How does Wi-Fi power compare to PoE?

Wi-Fi-only mode uses ~3W from the 5V adapter. PoE class 1 (under 4 W) also works fine. We typically deploy the T31W on PoE where available — gives you wired ethernet failover if Wi-Fi has a hiccup.

Yealink · T3 series · two-line + Wi-Fi

Yealink T31WTwo lines with built-in Wi-Fi 5 — no dongle required.

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.

Display

2.3″ backlit · 132×64 mono

SIP accounts

2 lines

Programmable keys

2 line keys + 4 soft keys

Connectivity

Wi-Fi 5 (802.11ac) + BT 4.2

Ethernet

Dual 10/100 · PoE class 1

Audio

HD voice · full-duplex

$129 one-time

or rent for $11.99/mo — month-to-month, return anytime

Ships pre-configured · free next-business-day for orders $200+

Order a T31W Rent for $11.99/mo Datasheet (PDF) ↓

✓ Auto-provisioned out of the box ✓ Warranty replacement included with rental ✓ Free shipping on orders $200+

Yealink T31W voip desk phone — front view with handset and display — Yealink T31W

Why the T31W is on the catalog.

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.'

Full technical specifications.

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)

How it works on voip.army.

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.

60s

Time from plug-in to first call

Boot, fetch config from our provisioning server, register, ready. About one minute on a normal connection.

SIP accounts on one phone

2 lines per phone. Each line key has a dual-color LED for status at a glance.

Programmable keys

2 line keys + 4 soft keys mapped from the voip.army portal — BLF, paging, parking, transfer destinations.

Per-device onboarding fees

Bringing your own? Send us the MAC, factory-reset, plug in. No charge to add it to the fleet.

802.3af

PoE class

Standard PoE — any 802.3af-compliant switch from the last 15 years powers the phone without an adapter.

Yealink

Auto-provisioning template

Tested against every Yealink firmware release for T31W. We catch regressions before they reach your fleet.

Need T31Ws for every desk?

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.

Get a quote Start a free trial first

✓ Free shipping on orders $200+ ✓ 30-day hardware return ✓ Pre-configured before shipping

Yealink T31WTwo lines with built-in Wi-Fi 5 — no dongle required.

Why the T31W is on the catalog.

Full technical specifications.

How it works on voip.army.

Time from plug-in to first call

SIP accounts on one phone

Programmable keys

Per-device onboarding fees

PoE class

Auto-provisioning template

Phones to compare it against.

Yealink T31P

Yealink T31G

Yealink T54W

Yealink T53W

Need T31Ws for every desk?