CCTV Camera Pros Geovision 8.4 Multicam Digital Surveillance System - Manual (Page 322)

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6.3.5 Other Applications
[Video Lost/Connection Lost Trigger I/O] Activates the specified output module if any camera loses
its video signal or the connection is interrupted.
[Never Recycling Input-Triggered Events] When the item is checked, the files of input-triggered
events won’t be recycled by the system when disk space is full.