Cisco 8831 - Mute IP phone DCU; On-Hook dialing; Dial number on-hook; Plus Dialing

Step 5
Enter the authentication code and press Submit.
The conference phone begins to install, update, or remove the LSC, depending on how the CAPF was
configured. During the procedure, a notification message is displayed so that you can monitor progress.
The LSC install, update, or removal process can take a long time to complete. You can stop the process at
any time by pressing Exit.
You can verify that an LSC is installed on the conference phone by choosing Apps > Admin Settings >
Security Setup and ensuring that the LSC setting shows Installed.
Cisco Unified IP Conference Phone 8831 Administration Guide for Cisco Unified Communications Manager 9.0
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Cisco Unified IP Conference Phone 8831 installation
Set up locally significant certificate