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Yealink SIP-T31G VoIP desk phone with 2.3 inch monochrome LCD and dual Gigabit ports

Yealink Network Technology Co., Ltd

Yealink Network Technology Co., Ltd SIP-T31G VoIP phone 2.3" 132x64 LCD Gigabit PoE 2 lines

SKU CH-KPTB-BVY93 MPN SIP-T31G

A 2.3 inch graphical LCD VoIP phone with dual Gigabit Ethernet ports, PoE support, and two SIP accounts for local 5-way conferencing

  • TypeVoIP Phones
  • SecurityNETWORK AND SECURITY SIP v1 (RFC2543), v2 (RFC3261) Call ser
  • PortsDual-port Gigabit Ethernet Power over Ethernet (IEEE 802.3af
  • DisplayDISPLAY AND INDICATOR 2.3" 132x64-pixel graphical LCD with b
  • PowerExternal Yealink AC adapter AC 100-240 V input and DC 5 V/0.
  • DimensionsDimension (W x D x H x T): 188 x 189 x 162 x 50 mm

Model SIP-T31G

  • HD voice clarity with Yealink HD Voice technology
  • Extra-large 2.3" 132x64 graphical LCD with backlight
  • Dual Gigabit Ethernet ports for fast wired connectivity
  • Power over Ethernet (IEEE 802.3af) simplifies installation
  • Two SIP accounts and local 5-way conferencing boost productivity

Entry-level Gigabit IP phone for small offices

The Yealink SIP-T31G is a corded VoIP handset with a 2.3" 132x64-pixel graphical LCD and dual-port Gigabit Ethernet. It supports two SIP accounts, local 5-way conferencing and HD voice. Power over Ethernet (IEEE 802.3af) class 1 and an external 5 V/0.6 A adapter are both available.

Suits teams needing two lines and PoE simplicity

Buyers who need more than two VoIP accounts or a colour display should look elsewhere. The monochrome backlit screen and dual RJ-45 ports fit basic desk workflows, while the single RJ9 headset port limits simultaneous wired headset and handset use.

Adjustable stand and EHS headset support change

The multi-angle stand lets users set the viewing angle for different desk heights. Electronic Hook Switch compatibility allows wireless headset control without a mechanical lifter. Unified firmware across the T3 series simplifies provisioning for administrators.

Highlights

  • HD voice clarity with Yealink HD Voice technology
  • Extra-large 2.3" 132x64 graphical LCD with backlight
  • Dual Gigabit Ethernet ports for fast wired connectivity
  • Power over Ethernet (IEEE 802.3af) simplifies installation
  • Two SIP accounts and local 5-way conferencing boost productivity

Specifications

BrandYealink
ModelSIP- T31G
Part NumberSIP- T31G
TypeVoIP Phones
SecurityNETWORK AND SECURITY
SIP v1 (RFC2543), v2 (RFC3261)
Call server redundancy supported
NAT traversal: STUN mode
Proxy mode and peer-to-peer SIP link mode
IP assignment: static/DHCP
HTTP/HTTPS web server
Time and date synchronization using SNTP
UDP/TCP/DNS-SRV (RFC 3263)
QoS: 802.1p/Q tagging (VLAN), Layer 3 ToS DSCP
SRTP for voice
Transport Layer Security (TLS 1.3)
HTTPS certificate manager
AES encryption for configuration file (AES256)
Digest authentication
OpenVPN, IEEE802.1X, L2TP VPN
IPv6
LLDP/CDP/DHCP VLAN
ICE
WPA2/WPA3
Secure boot
GARP (Generic Attribute Registration Protocol)
PortsDual-port Gigabit Ethernet
Power over Ethernet (IEEE 802.3af), class 1*
1 x RJ9 (4P4C) handset port
1 x RJ9 (4P4C) headset port
DisplayDISPLAY AND INDICATOR
2.3" 132x64-pixel graphical LCD with backlight
LED for call and message waiting indication
Dual-color (red or green) illuminated LEDs for line status information
Intuitive user interface with icons and soft keys
Multilingual user interface
Caller ID with name and number
Power saving
PowerExternal Yealink AC adapter AC 100-240 V input and DC 5 V/0.6 A output
Power consumption (PSU): 2-3 W
Power consumption (PoE): 3-4 W
DimensionsDimension (W x D x H x T): 188 x 189 x 162 x 50 mm
FeaturesPHONE
2 VoIP accounts
Call hold, mute, DND
One-touch speed dial, hotline
Call forward, call waiting, call transfer
Group listening, SMS, emergency call
Redial, call return, auto answer
Local 5-way conferencing
Direct IP call without SIP proxy
Ring tone selection/import/delete
Set date time manually or automatically
Dial plan
XML Browser, action URL/URI
Integrated screenshots
RTCP-XR, VQ-RTCPXR
Enhanced DSS Key
AUDIO
HD voice: HD handset, HD speaker
Smart Noise Filtering
Narrowband codec: PCMU (G.711A), PCMA (G.711µ), G.723.1, G.729, G.729A, G.729B, G.729AB, G.726, iLBC
DTMF: In-band,
Shipping weight0.91 kg
Package size229 × 229 × 127 mm

Other versions of this model

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Questions about this item

What network infrastructure must already provide Power over Ethernet for the SIP-T31G to operate without its external AC adapter?

A switch or injector that delivers IEEE 802.3af class 1 power over the dual-port Gigabit Ethernet RJ-45 ports.

Will the SIP-T31G register to a legacy SIP v1 (RFC 2543) call server that the buyer still runs?

Yes, the phone supports SIP v1 (RFC 2543) and SIP v2 (RFC 3261) for backward compatibility.

Which LED pattern confirms both SIP accounts are registered and idle after setup?

The dual-color line-status LEDs glow steady green for each of the two lines when registered and idle.

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