Yealink SIP-T31G Gigabit IP Phone

Engineered for dependable commercial communications, the Yealink SIP-T31G combines streamlined desktop design with high-speed network performance. Available as both new and refurbished units, this versatile 2-line VoIP phone integrates an extra-large 2.3-inch backlit graphical display, dual Gigabit Ethernet ports, integrated Power over Ethernet (PoE), and local 5-way conference calling to support efficient daily office administration.

Clear 2.3-Inch Backlit Visual Workspace

Designed to optimise everyday administrative workflows, the device features a high-contrast 2.3-inch graphical LCD screen complete with adjustable illumination. This readable interface presents caller ID details, recent call logs, and intuitive icon-driven menus with sharp clarity under any office lighting condition.

Classic Design & Practical Ergonomics

Designed by Yealink's original team, the T3 series proudly inherits the classic design concepts of the trusted Yealink IP phone family. Combining a modern, professional appearance with thoughtful ergonomic details, it ensures an intuitive, comfortable, and user-friendly operational experience for everyday office environments.

High-Speed Gigabit Switching & PoE Integration

Powered by an advanced chipset, the SIP-T31G includes dual-port Gigabit Ethernet interfaces that allow high-speed network traffic to pass directly through to an attached workstation. Additionally, integrated Power over Ethernet (IEEE 802.3af Class 2) supplies electrical power and network data through a single cable, eliminating the need for trailing cords

Advanced HD Voice & Acoustic Management

Ensuring professional speech fidelity across every call, the terminal incorporates Yealink's proprietary HD Voice technology alongside Smart Noise Filtering. These acoustic systems actively eliminate background interruptions, ensuring natural conversations whether operators use the handset, headset, or full-duplex speakerphone.

Comprehensive Call Handling & Multi-Line Versatility

Tailored to reduce operational friction, the phone supports core communication features including call hold, transfer, waiting, DND, intercom, group listening, and redial. Furthermore, built-in support for local 5-way conferencing enables users to host collaborative discussions instantly.

Enterprise Security & Zero-Touch Deployment

Protecting corporate networks against unauthorised access is a core priority. The hardware incorporates robust security protocols including TLS media encryption, SRTP voice protection, AES configuration file encryption, and IEEE 802.1X authentication. Large-scale rollouts are also simplified via centralised auto-provisioning platforms.

Features

• Dual Gigabit Pass-Through - Connects high-speed network infrastructure straight to desktop computers via integrated 10/100/1000 Mbps ports
• Backlit Graphical Screen - 2.3-inch display ensures effortless navigation of menus and call lists
• Opus & Wideband Audio Support - Delivers superior speech quality and network resilience through advanced acoustic filtering
• Dual SIP Accounts - Manages two separate lines simultaneously with dedicated dual-color status indicators
• Built-In 5-Way Conferencing - Allows multi-party meetings to be hosted locally without external bridge software
• Adjustable Desktop Stand - Features a multi-angle stand that easily transitions between standard desk use and wall mounting
• Zero-Touch Provisioning Support - Speeds up deployment schedules via FTP, TFTP, HTTP, HTTPS, and PnP auto-configuration

Technical Specifications

Display and Build

• Display - 2.3-inch 132 x 64-pixel graphical LCD with backlight
• Line Keys - 2 line keys with dual-color (red or green) LEDs
• Dimensions - 188mm x 189mm x 162mm x 50mm
• Mounting - Stand with 2 adjustable angles, wall mountable (wall mount is optional purchase)

Audio Features

• HD Voice - HD handset and HD speaker
• Noise Suppression - Smart Noise Filtering and Acoustic Echo Cancellation (AEC)
• Audio Codecs - Wideband codecs (Opus, G.722) and narrowband codecs (G.711A/μ, G.723.1, G.726, G.729AB, iLBC)
• Speakerphone - Full-duplex hands-free speakerphone
• Advanced Audio Processing - Comprehensive acoustic management including DTMF signalling (In-band, Out-of-band RFC 2833, SIP INFO), Voice Activity Detection (VAD), Comfort Noise Generation (CNG), Acoustic Echo Cancellation (AEC), Packet Loss Concealment (PLC), Adaptive Jitter Buffer (AJB), and Automatic Gain Control (AGC)

Phone Features

• Line Capacity - 2 VoIP accounts
• Call Management - Call hold, mute, DND, one-touch speed dial, hotline, call forward, call waiting, call transfer, and redial
• Interactivity - Group listening, SMS, emergency call, call return, auto answer, and local 5-way conferencing
• Directory & Logs - Local phonebook up to 1000 entries, blacklist, XML/LDAP remote phonebook, smart dialing, phonebook search/import/export, and call history (dialled/received/missed/forwarded)
• Customisation - Ring tone selection/import/delete, manual or automatic date/time setting, and XML browser/action URL/URI

IP-PBX Features

• Line Status - Busy Lamp Field (BLF) and Bridged Line Appearance (BLA)
• Call Handling - Anonymous call, anonymous call rejection, hot-desking, voice mail, and flexible seating
• Advanced Routing - Call park, call pickup, executive and assistant features, centralised call recording, visual voice mail, and call recording

Network and Security

• Network Interfaces - Dual-port Gigabit Ethernet (10/100/1000 Mbps)
• Power over Ethernet - IEEE 802.3af, Class 2 (PoE consumption: 3–4W)
• Security Protocols - TLS, SRTP for voice, HTTPS certificate manager, AES encryption for configuration files, Digest authentication, OpenVPN, and IEEE 802.1X

Standard Package Contents

• Yealink SIP-T31G IP Phone
• Handset with Curly Cord
• Ethernet Cable (1.5m CAT5E UTP Cable)
• Desk Stand
• Quick Start Guide

*Please note - refurbished products package contents may vary from the above