Power Issues

Check the Power Supply:

• Ensure the base station is properly connected to a power source via the power adapter or Power over Ethernet (PoE)
• Try a different power adapter or PoE-enabled network switch port

No LED Indicator:

• If the power LED is off, the adapter or PoE source may be faulty
• Test the base station with another known working power source

Network Connectivity Problems

Check the Ethernet Cable:

• Ensure the Ethernet cable is securely plugged into the base station’s WAN port
• Test with another cable or different switch/router port

Verify Network Settings:

• Check if the base station has an IP address
  1. Access the Status menu via a registered handset (Menu > Status > Base)
  2. Alternatively, use a web browser to access the base station’s web interface
• If no IP address is assigned, ensure the DHCP server is enabled on your router

Reboot:

• Disconnect power for 30 seconds, then reconnect
• If using PoE, unplug and replug the Ethernet cable

Registration/Call Issues

Handset Not Registering:

• Ensure the handset is compatible with the W70B base station
• Put the base into registration mode:
  1. Press and hold the Paging button on the base for 5 seconds
  2. On the handset, navigate to Menu > Settings > Registration > Register Handset
  3. Select the W70B base station and enter the registration PIN (default: 0000)

SIP Account Registration:

Verify the SIP settings:

1. Find the IP address of the base station (via handset menu or router)
2. Log in to the web interface (default username/password: admin/admin)
3. Navigate to Account > Register and check if the SIP server, username, and password are correct
4. If needed, re-enter credentials provided by your VoIP provider

Check for Firewall Issues:

• Ensure that necessary ports (5060 for SIP, 5061 for secure SIP) are open on your network

Audio Quality Problems

Low Volume or No Sound:

• Adjust the handset volume during a call
• Ensure the handset’s speaker/microphone is not obstructed

One-Way Audio or Dropped Calls:

• Check if the issue is present on multiple calls or only with specific numbers
• Ensure your router/firewall is not blocking VoIP traffic
• Prioritize VoIP traffic using QoS (Quality of Service) on your router

Echo or Distortion:

• Test with another handset or base station
• Reduce interference by keeping the base station away from Wi-Fi routers, microwaves, or metal objects

Firmware Issues

Check and Update Firmware:

• Visit Yealink’s official website to download the latest firmware for the W70B
• Update via the web interface:
  1. Log in to the base station’s web interface
  2. Navigate to Upgrade > Firmware Update
  3. Upload the downloaded firmware file and apply the update

Factory Reset

From the Base Station:

• Press and hold the Reset button (located on the back) for 10 seconds until the LED blinks

Via Web Interface:

• Log in and navigate to Settings > Upgrade > Reset to Factory