Comelit MT COMELIT VSC IP START SERIES - Manual (Page 23)

The type of alarm can be divided into alarm input, motion detection, video
shelter, video lost.
Alarm source come from the device channels.
Begin time and end time is the time of alarm triggered and the time of alarm stop.
Linkage action shows the relevant linkage rule information, such as there will
show pop image chars if set video action linkage.
The playback, icon indicate that there a record video, click the
icon to play.
2.4.2 Operation logs
Operation logs: all users operations will be recorded and the operation type
include: All type, log in/out, add/delete devices, setup/cancel alarm, open/ close
record, remote configuration, set alarm linkage.