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Upload phone certificate

Do not perform these steps if you have selected 
Trust Phones
 in the Blast System Configuration screen. If you did not select 
Trust Phones
, the CUCM Phone Certificate Authority must be downloaded from CUCM and imported to the Blast application server.
  1. Open 
    CUCM
    .
  2. From the navigation drop-down list, select 
    Cisco Unified OS Administration
    .
  3. Click 
    Security > Certificate Management
    .
  4. Search for the CAPF certificate where 
    Certificate begins with CAPF
    .
  5. Click 
    Find
    .
  6. Click 
    CAPF Common Name
    . The Certificate Details window should show the file name "CAPF.pem".
  7. Click 
    Download.PEM
    .
  8. Import the CAPF.pem file to the application server's local computer- Trusted Root CA's certificate store.