Yealink SIP-T43U T4U Series Desktop IP Phone

The Yealink SIP - T43U from the T4U series is a top - notch desktop IP phone designed for outstanding business communications. It's a 12 - line phone with a 3.7 - inch large black - and - white backlit screen and EXP43 support. With Yealink Optima HD Voice technology and the Opus wideband codec, it delivers superb audio quality and crystal - clear conversations. It responds quickly when using call features. The phone comes with dual USB ports, enabling Bluetooth, Wi - Fi, USB headset use, and USB recording, allowing you to choose any two functions as per your needs. The new T4U series has an elegant look similar to the T4 line, but with better interoperability and collaboration features. **Key Features** - 3.7' 360x160 - pixel graphical LCD with backlight - Dual USB ports - Dual firmware images - Opus codec support - T4U Auto - P template unified - T4U firmware unified - Up to 12 SIP accounts - PoE support - USB headset and EHS support - Wi - Fi via WF40/WF50 - Bluetooth via BT40/BT41 - Supports color - screen expansion modules - Stand with 2 adjustable angles - Wall mountable **Technical Specifications** **Audio Features**: HD voice (HD handset, HD speaker), Hearing aid compatible (HAC) handset, Acoustic Shield. Wideband codec includes AMR - WB (optional), Opus, G.722. Narrowband codec has AMR - NB (optional), Opus, G.711(A/µ), G.723.1, G.729AB, G.726, iLBC. DTMF supports 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**: 12 VoIP accounts, One - touch speed dial, redial, Call forward, call waiting, call transfer, call hold, Call return, group listening, emergency call, Mute, auto answer, DND, hotline, 5 - way conference call, Direct IP call without SIP proxy, Ring tone selection/import/delete, Set date time manually or automatically, Dial Plan, XML Browser, Action URL/URI, RTCP - XR (RFC3611), VQ - RTCPXR (RFC6035), Dual USB ports (2.0 compliant), Bluetooth earphone through BT40/BT41, Contact synchronization through BT40/BT41, Wi - Fi through WF40/WF50, USB call recording through USB flash drive, USB headset, Expansion Module EXP43, Wireless Headset Adapter EHS40, Enhanced DSS key. **Directory**: Local 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 Appearance (BLA), Anonymous call, anonymous call rejection, Hot - desking, voice mail, Flexible seating, Executive and Assistant, Call Park, call pickup, Centralized call recording, call recording, Visual voice mail. **Display and Indicator**: 3.7” 360x160 - 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**: 8 - line keys with LED, 8 - line keys can be programmed up to 21 paperless, DSS keys (3 - page view), 5 features keys: message, headset, mute, redial, hands - free speakerphone, 4 context - sensitive “soft” keys, 6 navigation keys, 2 volume control keys, Illuminated mute key, Illuminated headset key, Illuminated hands - free speakerphone key. **Interface**: Dual - port Gigabit Ethernet, Power over Ethernet (IEEE 802.3af), Class 2, 2 x USB port (2.0 compliant), 1 x RJ9 (4P4C) handset port, 1 x RJ9 (4P4C) headset port. **Other Physical Features**: Color: Classic Grey, Stand with 2 adjustable angles, Wall mountable. **External Yealink AC adapter (optional)**: AC 100~240V input and DC 5V/1.2A output. **USB output currency**: 5V 500mA. **Power consumption (PSU)**: 0.9 - 2.2W. **Power consumption (PoE)**: 1.5 - 3.2W. **Dimension (W*D*H*T)**: 224.9mm*206.2mm*174.9mm*52mm. **Operating humidity**: 10~95%. **Operating temperature**: 10~50 Degrees C (+14~122 Degrees F). **Management**: Configuration via Browser/phone/auto - provision, Auto provision via FTP/TFTP/HTTP/HTTPS for mass deploy, Auto - provision with PnP, Broadsoft device management, 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 in STUN mode, Proxy mode and peer - to - peer SIP link mode, IP assignment via 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**: Yealink SIP - T43U IP phone, Handset with handset cord, Ethernet Cable (2m CAT5E UTP Cable), Stand, Quick Start Guide, Power Adapter (Optional), Wall Mount Bracket (Optional), Qty/CTN: 5 PCS, N.W/CTN: 6.0 kg, G.W/CTN: 6.6 kg. **Giftbox size**: 246mm*223mm*120mm. **Carton Meas**: 627mm*256mm*235mm.

Using the Yealink SIP - T43U IP phone is easy. First, connect it to the network using the Ethernet cable. You can choose to power it via PoE or the optional AC adapter. Once it's powered on and connected, start setting up your SIP accounts. You can do this through the phone's interface or via auto - provision methods like FTP or TFTP. When making calls, you can use the one - touch speed dial or search your local or remote phonebook. The call features such as call transfer, hold, and conference call are easily accessible through the feature keys. If you want to use a USB headset, Bluetooth earphone, or record calls, just plug in the relevant device to the dual USB ports. **Note**: Make sure the operating environment is within the specified humidity (10 - 95%) and temperature (10 - 50 Degrees C) ranges. Also, keep the phone away from liquids and direct sunlight. **Maintenance**: Regularly clean the phone's screen and keys with a soft, dry cloth. If you need to reset the phone to factory settings, you can do it through the management options. Check for firmware updates periodically to ensure the phone has the latest features and security patches.