Yealink SIP-T31W Wi-Fi Business IP Phone
PRODUCT DESCRIPTION
Yealink SIP-T31W Classic Business Wi-Fi IP Phone (SIP-T31W) - 1 Year Local Warranty
Wi-Fi Business IP Phone for Any Desk
The Yealink SIP-T31W brings wireless freedom to entry-level desk calling: built-in dual-band Wi-Fi (IEEE 802.11a/b/g/n/ac, up to 433 Mbps) means it deploys without an Ethernet drop — warehouses, retail counters and temporary desks. Its 2.3-inch backlit LCD, two SIP accounts with LED line keys and Yealink HD voice cover everyday calling cleanly.
Deploy Where the Cable Can’t Go
Connect over Wi-Fi with WPA2/WPA3 security, or use the two 10/100 Ethernet ports with IEEE 802.3af PoE (Class 2) when wired suits. The full-duplex speakerphone with AEC and G.722 wideband audio keep the experience professional at any location.
Enterprise Management, Entry Price
Auto-provisioning via FTP/TFTP/HTTP/HTTPS, TLS 1.3 and SRTP security, OpenVPN/L2TP VPN and a 1000-entry local phonebook make the T31W as manageable as it is affordable.
Yealink SIP-T31W Datasheet — Technical Specifications
General
| Model | Yealink SIP-T31W |
| Part Number | 1301039 |
| Product Type | 2-line Wi-Fi SIP desk phone |
| Warranty | 1 Year Local Warranty (Singapore) |
Display & Keys
| Display | 2.3" 132 x 64-pixel graphical LCD with backlight |
| SIP accounts | Up to 2 |
| Line keys | 2 line keys with LED |
| Feature keys | 6 feature keys (transfer, message, headset, redial, mute, hands-free speakerphone) |
Audio
| HD voice | HD handset, HD speaker |
| Speakerphone | Full-duplex hands-free speakerphone with AEC |
| Wideband codec | G.722 |
| Narrowband codecs | PCMU (G.711μ), PCMA (G.711A), G.723.1, G.729, G.729A, G.729B, G.729AB, G.726, iLBC |
| Headset port | 1 x RJ9 (4P4C) |
Wireless & Connectivity
| Wi-Fi | Built-in dual-band, IEEE 802.11a/b/g/n/ac, up to 433 Mbps; WPA2/WPA3 |
| Ethernet | 2 x RJ45 10/100M Ethernet ports |
| PoE | IEEE 802.3af, Class 2 |
| Security | OpenVPN, IEEE 802.1X, L2TP VPN, TLS 1.3, SRTP for voice |
| Network | 802.1p/Q tagging (VLAN), Layer 3 ToS DSCP, IPv6 |
Power
| Power adapter | DC 5 V / 0.6 A output (optional) |
| Consumption | PSU: 1.3–1.7 W; PoE: 2–2.6 W |
Design & Features
| Dimensions (W x D x H x T) | 188 x 189 x 162 x 50 mm |
| Mounting | Stand with 2 adjustable angles; wall mountable |
| Operating conditions | -10 to +45°C; 10–95% humidity |
| Phonebook | Local phonebook up to 1000 entries |
| Provisioning | Browser / phone / auto-provision via FTP/TFTP/HTTP/HTTPS |
Compatibility & Software Support
The SIP-T31W is an open-SIP business IP phone. It registers with SIP-compatible IP-PBX and hosted voice platforms — check compatibility with your PBX or hosted-voice provider, or ask the SourceIT team for advice.
- Mass deployment: auto-provisioning via FTP / TFTP / HTTP / HTTPS
- Security: IEEE 802.1X, OpenVPN, L2TP VPN, TLS 1.3, SRTP
- Networking: VLAN (802.1p/Q), Layer 3 ToS DSCP, IPv6
- Headsets: RJ9 (4P4C) headset port
Package Contents & T3 Series Ordering Information
In the box:
- SIP-T31W IP phone
- Handset with handset cord
- Stand
- Quick Start Guide
- Ethernet cable (optional)
- Power adapter (optional)
The SIP-T31W sits in Yealink’s classic T3 series:
| Model | Part No. — Key difference |
| Yealink SIP-T31W (this product) | 1301039 — 2 lines, built-in dual-band Wi-Fi, 10/100 Ethernet |
| Yealink SIP-T31P | 1301043 — 2 lines, 10/100 Ethernet, PoE |
| Yealink SIP-T31G | 1301044 — 2 lines, dual Gigabit Ethernet, PoE |
| Yealink SIP-T33G | 1301046 — 4 lines, 2.4" colour screen, dual Gigabit Ethernet |
| Yealink SIP-T34W | 1301037 — 4 lines, colour screen, dual-band Wi-Fi, Gigabit, USB |
| Yealink SIP-T30P | 1301048 — 1 line entry model (coming soon) |
Datasheet & Downloads
Frequently Asked Questions — Yealink SIP-T31W
Does the Yealink T31W work without a network cable?
Yes. Built-in dual-band Wi-Fi (802.11a/b/g/n/ac with WPA2/WPA3) connects it to your wireless network directly — just add power via the optional 5 V adapter. On wired desks, the Ethernet ports with PoE work as usual.
What is the difference between the T31W and the T31P/T31G?
The T31W adds built-in Wi-Fi; the T31P (10/100) and T31G (Gigabit) are wired-only. All three share the 2.3" backlit display and 2 lines.
What if I want a colour screen with Wi-Fi?
Step up to the SIP-T34W — 2.4" colour display, 4 lines, Gigabit Ethernet, a USB port and the same dual-band Wi-Fi.
Does the T31W have Bluetooth or USB?
No — the datasheet lists no Bluetooth or USB port. Headsets connect via the RJ9 port.
Is the T31W secure enough for corporate Wi-Fi?
It supports WPA2/WPA3, IEEE 802.1X, OpenVPN, L2TP VPN, TLS 1.3 and SRTP voice encryption.
Does the SIP-T31W come with a warranty in Singapore?
Yes. Every SIP-T31W sold by SourceIT comes with a 1 Year Local Warranty in Singapore and a GST invoice.
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