SECURITY FEATURES
5 -52 DT820 Phone User Guide
• Illegal parameter
• Unknown CA
• Access denied
• Decode error
• Decrypt error
• Export restriction
• Protocol version
• Insufficient security
• Internal error
• User canceled
If any of the above errors are encountered, an error message displays on the phone.
The most common error messages are:
Table 5.4 TLS Errors
802.1X STATUS & DEBUGGING MESSAGES
The current 802.1X status of the phone is displayed on the Network Information
status screen (Menu\Status\Network Information).
If 802.1X status enabled, the phone displays the current Authentication state as
“Authenticated”, “Held” or “Connecting”.
Error Message Cause(s)
TLS Bad Certificate. • Bad certificate
TLS Certificate Expired. • Certificate expired
TLS Certificate Revoked. • Certificate revoked
TLS Decrypt Error. • Signature Failure
TLS Handshake Failure. • Handshake failure
TLS Internal Error. • Internal error
TLS Unknown CA. • Unknown CA
TLS Unknown Certificate. • Certificate unknown
TLS Unsupported Cert. • Unsupported certificate
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