Hello,
Let me explain.
Symantec Antivirus version 10 uses Symantec System Center (SSC) as the Manager Console.
Symantec Endpoint Protection version 11 uses Symantec Endpoint Protection Manager (SEPM) as the Manager Console.
Symantec Endpoint Protection version 12.0 uses Symantec Protection Center (SPC) as the Manager Console.
Symantec Endpoint Protection version 12.1 uses Symantec Endpoint Protection Manager (SEPM) as the Manager Console.
Hope that helps!!