Audio Features
• HD voice: HD handset, HD speaker
• Smart Noise Filtering
• Wideband codec: G.722
• Narrowband codec: PCMU (G.711μ), PCMA
(G.711A), G.723.1, G.729, G.729A, G.729B,
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
• Built-in dual band Wi-Fi:
- Network standard: IEEE802.11a/b/g/n/ac
- Transmission rate: Up to 433Mbps (dynamic)
- Frequency range: 2.4GHz/5.0GHz
• Enhanced DSS Key
Directory
• Local phonebook up to 1000 entries
• Blocklist
• 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 Appearance (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
• 2 x RJ45 10/100M Ethernet ports
• 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 100-240 V input and DC 5 V/0.6 A output
• Power consumption (PSU): 1.3-1.7 W
• Power consumption (PoE): 2-2.6 W
• Dimension (W × D × H × T): 188 × 189 × 162 × 50
mm
• 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-T31W IP phone
- Handset with handset cord
- Ethernet Cable (optional)
- Stand (not applicable to US wall plate Standard)
- Quick Start Guide
- Power Adapter (optional)
• Qty/CTN: 10 PCS
• N.W/CTN: 9.536 kg
• G.W/CTN: 10.576 kg
• Giftbox size: 213 × 210 × 103 mm
• Carton Meas: 535 × 443 × 227 mm
