Phone Features

• 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

Directory

• Loal phonebook up to 1000 entries

• Black list

• XML/LDAP remote phonebook

• Smart dialing

• Phonebook search/import/export

• Call history:   dialed/received/missed/forwarded

IP-PBX Features

• Busy Lamp Field (BLF), Bridged Line Apperance(BLA)

• Anonymous call, anonymous call rejection

• Hot-desking, voice mail

• Flexible seating

• Call park, call pickup

• Executive and Assistant

• Centralized call recording

• Visual voice mail

• Call recording

Display 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

Feature keys

• 2 line keys with LED

• 6 features keys: transfer, message, headset,

redial, mute, hands-free speakerphone

• 5 navigation keys

• Volume control keys

Interface

• Dual-port Gigabit Ethernet

• Power over Ethernet (IEEE 802.3af), class 1*

• 1 x RJ9 (4P4C) handset port

• 1 x RJ9 (4P4C) headset port

* Applies to the phone with a V2 logo or later on the label

Other Physical Features

• Color: Classic Grey

• Wall mountable

• External Yealink AC adapter: AC 100~240V input and DC 5V/600mA output

• Power consumption (PSU): 2-3W

• Power consumption (PoE): 3-4W

• Dimension (W*D*H*T): 188mm*189mm*162mm*50mm

• Operating humidity: 10~95%

• Operating temperature: -10 to +45°C (+14 to 113°F)

• Storage temperature: -30 to +70°C (-22 to +158°F)

Management

• Configuration: browser/phone/auto-provision

• Auto provision via FTP/TFTP/HTTP/HTTPS for mass deploy

• Auto-provision with PnP

• Zero-sp-touch, TR-069

• Phone lock for personal privacy protection

• Reset to factory, reboot

• Package tracing export, system log

Network 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)

Package Features

• Package content:

- Yealink SIP-T31G IP phone

- Handset with handset cord

- Ethernet Cable (1.5m CAT5E UTP Cable)

- Stand (not applicable to US wall plate Standard)

- Quick Start Guide

• N.W/CTN: 9.98 kg

• G.W/CTN: 10.836 kg

• Giftbox size: 213 mm*210 mm*103 mm

• Carton Meas: 535 mm*443 mm*227 mm