17.2
Monitoring
Unlike 24-hour recording by an NVR, edge recordings are typically short recordings. Start and
stop times for the recordings are triggered by external events, such as a lost or restored
connection to an NVR or VMS, for example. To detect these events, the BC840-MC monitors
the network connection to the device specified by its IP address. This is done by pinging it at
regular intervals to test its reachability over the network.
To monitor a connection
1
In the Connector monitor section, specify the IP address to be monitored.
2
Select Enable.
3
Click Save.
The device is now pinged every 15 seconds.
If the device is reachable, IP address highlighting goes from pink to green.
17.3
Recording
Detecting a loss of connection to the device at the monitored IP address triggers the
following:
● Edge recording starts.
● The IP address of the device is highlighted in pink to indicate the connection loss.
● The video clip appears in the Available clips section with clip status shown as 'recording'.
A recording status reported as 'pending' is an indication that the encoder used for edge
recording is either not enabled or not correctly configured for edge recording.
● Edge recording continues until the device becomes responsive to ping messages again.
Important: Recording does not start if the device at the specified IP address has not been
detected previously. In other words, recording is only possible if the device has
acknowledged its presence on the network at least once by responding to ping messages.
This is to prevent unintended recording to the SD card.
17.4
Clips
Details about clips can be found in the Available clips section.
● Clips with recording status 'recording' or 'ready' are available for download in .avi format.
● Clips include 30 seconds of prerecorded video and five seconds of postrecorded video. The
prerecording mechanism is active at all times.
● Clip file size will not exceed 500 MB. If a recording requires more storage capacity,
multiple clips are created.
● Clips can be deleted one at a time (select the clip, and then click Delete), or all in one go
(click Delete all).
To download a clip
1
In the Available clips section, select the clip.
2
Click Download.
3
Specify if you want to open, save, or cancel the download.
Edge recording
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