Step-by-step instructions to fix connection and call issues with your Yealink T34W
The Yealink SIP-T34W is a mid-range IP desk phone featuring a color LCD screen, built-in dual-band Wi-Fi (2.4G/5G), a USB 2.0 port for headsets, support for up to 4 SIP lines, and 5-way audio conferencing. Common issues often arise from network connectivity, provisioning, firmware, or audio problems. Below are the most common problems based on user reports, official documentation, and support resources, along with step-by-step fixes. If issues persist, verify compatibility with your VoIP provider or contact Yealink support via their portal. Always back up your configuration before performing resets.
1. Basic Restart and Reset
Symptoms: Frozen screen, license errors, or unresponsive interface.
Causes: Minor software glitches or configuration errors.
Fixes:
- Restart the Phone: Unplug the power adapter (or Ethernet if using PoE), wait 30 seconds, and plug it back in. Alternatively, if the interface is responsive, navigate to Menu > Status > Reboot using the OK key.
- Factory Reset: If restarts fail, reset to factory defaults. Press and hold the OK key for 7 seconds or go to Menu > Advanced > Reset to Factory. Note: This erases custom settings, so back up configurations via the web interface[](http://[phone-IP-address]) before proceeding.
2. Network Connectivity Issues
Symptoms: No IP address, Wi-Fi drops, or failure to register with SIP server.
Causes: Ethernet/Wi-Fi misconfiguration, network congestion, or DHCP issues.
Fixes:
- Verify IP Address: Check the phone’s IP via Menu > Status > IPv4. Ensure it has a valid IP (e.g., 192.168.x.x). If not, verify the Ethernet cable or PoE switch, or enable Wi-Fi via Menu > Basic > Wi-Fi > Scan.
- Wi-Fi Issues: The T34W’s dual-band Wi-Fi may drop in crowded networks. Reconnect via Menu > Wi-Fi, forget the network, and re-enter credentials. Ensure the router supports WPA2/3 security. If using a DECT dongle (e.g., DD10K), confirm pairing with a W60B base.
- Ping Test: From a PC on the same network, ping the phone’s IP address to rule out LAN issues.
3. Audio and Call Issues
Symptoms: One-way audio, no audio, echo, or failed conference/transfer calls.
Causes: Codec mismatch, NAT/firewall issues, or hardware/connection problems.
Fixes:
- One-Way Audio on First Ring: Common in FreePBX setups; answer on the second ring as a workaround. Adjust firewall rules for UDP ports 10000-20000 in your PBX to resolve RTP issues.
- No Audio/Echo: Check the handset cord, ensure mute is off (LED off), and verify headset connections (USB or Bluetooth via BT50/BT51A). Test with speakerphone. Confirm codec settings (G.711 preferred) via the web interface under Account > Advanced.
- Conference/Transfer Fails: Ensure firmware supports 5-way calls. Access conferencing via OK > Features > Conference. If issues persist, verify line registrations in the web interface.
Additional Tips
- Firmware Updates: Check for updates via Yealink’s support portal[](https://www.yealink.com/en/support) to resolve bugs or add features like enhanced 5-way conferencing.
- Voicemail Access: Use the voicemail key or dial the provider’s feature code to retrieve messages.
