Audio Features
HD voice: HD handset, HD speaker
Smart Noise Filtering
Wideband codec: Opus, G.722
Narrowband codec: G.711(A/μ), G.723.1,
G.729AB, G.726, iLBC
DTMF: In-band, Out-of-band (RFC 2833) and SIP
INFO
Full-duplex hands-free speakerphone with AEC
VAD, CNG, AEC, PLC, AJB, AGC
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 2
1 x RJ9 (4P4C) handset port
1 x RJ9 (4P4C) headset port
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: -10~50°C (+14~122°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)
HTTPS certificate manager
AES encryption for configuration file
Digest authentication
OpenVPN, IEEE802.1X
IPv6
LLDP/CDP/DHCP VLAN
ICE
Package Features
Package content:
Yealink SIP-T31G IP phone
Handset with handset cord
Ethernet Cable (1.5m CAT5E UTP Cable)
Stand
Quick Start Guide
Power Adapter (Optional)
Qty/CTN: 10 PCS
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 | 
