QNAP Security VioStor CMS (Version: 1.0.1) - Manual (Page 150)

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4.2 Service Log
Click “Server Log” on the configuration page and then the “System Event” tab to list all
service logs. Each record listed is recorded from the last login to the current login. The log
content is the communications, including messages, warnings, and errors, between the
CMS system applications and the PC, CMS Server, or other NVR devices
For each record, its date and time, event level, username, IP address, device name, the log
content and status are displayed from left the right.