SSC is a server / client solution.
Most of the time when working with SSC you will want to connect to the server to access the remotely stored database containing users, institutions, etc. When recording samples you will also transfer them to the server directly in most cases.
Sometimes, though, you might not have a (trusted) internet connection available and still need to record samples with SSC. For this purpose SSC contains an offline mode allowing you to gather speech data without a connection to the SSCd server.
In offline mode you cannot add, edit or view users or institutions. You can only gather new samples to send to the server later on through the stored samples functionality.
Recording works the same in offline mode as it does when connected to the server but certain features might be unavailable (like resolving the name or validity of the entered user id).