Unable to Call Forward All (CFA) from Phones

Issues in production are the gifts that keep on giving. Another strange one to look at as phones were unable to perform Call Fortwarding All (CFA) from phones, depending on which server they were registered to.

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CUCM  UC  Phones 

Dial Peers Unencrypted Post Upgrade

I ran in to an issue in a customer’s production enviornment a few months back with a voice stream not negotiating Secure Real Time Transport Protocol (SRTP) even though it was configured correctly on the customer’s edge router, or so we thought.

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CUBE  Crypto  UC  SRTP 

SSM On-Prem Upgrade Issue: "No Matching MAC Found"

This document provides step-by-step instructions for upgrading Cisco’s Smart Software Manager (SSM) On-Prem from version 7-202001 to 8-202102, addressing common issues like Message Authentication Code (MAC) mismatches and using SFTP for file transfers.
I wrote this a while back when running in to issues in a production environment and am finally posting in case others run in to this while preparing for their Alma Linux upgrades. See my other post for those upgrade steps.

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