This document describes how to troubleshoot the TFTP Not
Authorized error message in Cisco Unified Communications
There are no specific requirements for this document.
The information in this document is based on Cisco Unified
Communications Manager Express 7.x.
The information in this document was created from the devices in a
specific lab environment. All of the devices used in this document started with
a cleared (default) configuration. If your network is live, make sure that you
understand the potential impact of any command.
Technical Tips Conventions for more information on document
The TFTP Not Authorized error message
appears on the IP phone screen when it tries to register with Cisco Unified
Communications Manager Express.
A Cisco Unified Communications Manager Express security
misconfiguration can cause this issue.
Complete these steps in order to resolve this issue:
Enter these commands under telephony-service:
Enter these commands under the specific ephone for
which you want to register the security settings:
Enter this command under
Enter these commands under
Delete the CTL file from the phone if it previously downloaded a
From the IP phone, choose settings.
Press **# in order to unlock the
Press more until you see the erase