Troubleshooting - Yealink SIP-T4X Provisioning Manual

This chapter provides general troubleshooting information to help you solve problems
you might encounter when deploying phones.
If you require additional information or assistance with the deployment, contact your
system administrator.
Why does the phone fail to download configuration files?
Ensure that auto provisioning feature is enabled.
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Ensure that the provisioning server and network are reachable.
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Ensure that authentication credentials configured on the phone are correct.
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Ensure that configuration files exist on the provisioning server.
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Why does the provisioning server return HTTP 404?
Ensure that the provisioning server is properly set up.
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Ensure that the access URL is correct.
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Ensure that requested files exist on the provisioning server.
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Why does the phone display "Network Unavailable"?
Ensure that the Ethernet cable is plugged into the Internet port on the phone and

the Ethernet cable is not loose.
Ensure that the switch or hub in your network is operational.
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Ensure that the configurations of network are properly set in the configuration files.
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Why is the permission denied when uploading files to an FTP server?
Ensure that the complete path to the root directory of the FTP server is authorized.
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On the provisioning server, check the file permissions, if necessary, change the file
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permissions.
Why doesn't the phone obtain the IP address from the DHCP server?
Ensure that settings are correct on the DHCP server.
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Ensure that the phone is configured to obtain the IP address from the DHCP server.
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Why doesn't the phone download the ringtone?
Ensure that the file format of the ringtone is *.wav
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Troubleshooting

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