08-31-2022 06:39 AM
Hello all
all cisco ipphones in our organization display the following error message "service interruption" , until now i still can'f find the cause of this issue, and the only solution that i found to make phones working is to change de "Device Security Profile" parameter from "Cisco 6921 - Standard SCCP Secure profile" to " Cisco 6921 - Standard SCCP Non-Secure Profile" on each of our ipphones, please check the attached screeshots.
everything has been working fine for years, but since two weeks ago, this issue started to appear on all the ipphones, and i dont now why
Sorry i'm just a beginner -_-'
Thank you very much for your help.
Regards
Solved! Go to Solution.
09-01-2022 12:36 PM - edited 09-01-2022 12:37 PM
Cisco 6900 series phones reached end of support in 2019.
These phones come with a MIC (manufacturer Installed Certificate) that is only valid for 10 years.
Most likely, your MIC certs have expired.
Once the cert expires, you can't use these phones in secure mode any more. But you can continue to use them in non-secure mode.
08-31-2022 06:55 AM
Why did the phone have the "secure" profile in the first place?
Are you using encrypted calls internally?
Which value has the Enterprise parameter "Cluster Security Mode" in CUCM?
09-01-2022 04:08 AM
Hello b.winter,
the Enterprise parameter value of "Cluster Security Mode" is 1 , please check the screenshot.
Best regards
09-01-2022 04:39 AM
What about my other questions?
09-01-2022 12:36 PM - edited 09-01-2022 12:37 PM
Cisco 6900 series phones reached end of support in 2019.
These phones come with a MIC (manufacturer Installed Certificate) that is only valid for 10 years.
Most likely, your MIC certs have expired.
Once the cert expires, you can't use these phones in secure mode any more. But you can continue to use them in non-secure mode.
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