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Yealink Phone: Phone Displays No Service
8x8 Support

Yealink Phone: Phone Displays No Service

Symptom

Your Yealink phone LCD display shows the message No Service. There is no dial tone, and you are unable to make or receive calls.

Applies To

  • Yealink Phones

Resolution

Power Cycle The Phone

In cases where the phone had been properly working for a long time and is only suddenly afflicted with these error messages, power cycling your network is often able to clear it up.

Further network Troubleshooting

  • Swap out the Ethernet cord connecting the phone to the network for a different one (to see if a faulty cord might be the issue).
  • Is the phone connected to a wall jack? If so, try connecting it directly to a networking device (router or switch).
  • If the phone is connected to a networking device, try plugging it into a different port on the device (to see if a faulty port is the issue).
  • If accessible, review the firewall/router settings and be sure to disable the following:
    • SIP-ALG
    • SPI
    • Firewall
  • You can also try setting a static IP on the phone, which has been known to help resolve these issues.

Cause

Your phone is unable to successfully register a SIP account with our services.

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