Cisco Unified Call Manager - Cisco Phone Error: Host Not Found

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FAQ
Contatti

Cisco Unified Call Manager – Cisco Phone Error: Host Not Found

Paolo Caparrelli Cisco 22 June 2022

Error: Host Not Found

The Host Not Found error message is received when you press the corporate directory on some 7945 and 9971 IP Phone models.

Solution

This issue can occur if you have changed the domain for the CUCM Publisher and Subscriber. In order to resolve this issue, you need to delete the ITL file from the phone. Complete either of these steps in order to accomplish the task:

On 79XX IP Phone models, navigate to Settings > Security > Trust List > ITL File > **# (to unlock the settings) > Erase.
On 89XX/99XX Sip IP Phone models, go to Settings > Administrator Settings > Reset Settings > Security Settings.

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