Alarm: Exception - Swann Digital Video Recorder Manual

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An Exception is any deviation from the DVR's normal
behaviour - phrased another way, it's like saying the DVR's
been working fine except for these events
Exception Type: What event type you'd like the DVR to react
to. By configuring the Action for these events, you can create
any combination of audio alerts (see below) or auto-emails to
be sent for different event types.
HDD Full: As the name suggests, this event occurs when the
DVR runs out of space on the hard drive to save new footage.
This event is redundant if you've got overwrite enabled, as
the DVR will automatically delete old footage to ensure it can
continue to record.
HDD Error: Occurs when the DVR has trouble accessing its
hard drives, or when it cannot detect one at all. This error could
be generated by either an internal hard drive, or an external
one connected to the eSATA port.
Net Disconnected: Will occur if the DVR has problems
connecting to the Internet. This may indicate a problem
with the DVR's configuration, a fault with your network or a
problem with your Internet Service Provider (ISP).
IP Conflict: This event will occur if the DVR detects another
device on the same network with a conflicting IP address. It's a
little like two houses with the same number being on the same
street - one house might get the other's mail, or get woken up
at all hours of the night being asked if someone named "Big
Bob" lives there.
Basically, it indicates that two devices are trying to use the
same IP address. This shouldn't occur if you're using DHCP
addressing, unless one or more devices is set to use a STATIC
IP (the static addressing method overrides the automatic
assignment process).
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Alarm: Exception

Audio Warning: The DVR will use its internal buzzer to emit an
alarm tone. It sounds like an old computer indicating an error,
or a large truck backing up.
Send Email: The DVR will send an auto-email alert when the
event type you've selected occurs.
Trigger Alarm Output: Instructs the DVR to output an alarm
signal from one or both alarm output terminals. The alarm
output must be correctly connected and configured.