Rapid Eye™ Multi-Media DVR Installation Guide
Document 800-02607V3 Rev A
45
11/09
or log entry has occurred. Remove the opaque cloth. Turning the lights off at the scene can
also trigger tamper detection, as can panning a PTZ camera from a light colored scene to
a darker scene (or the opposite). Lowering the threshold can compensate. Blinding a
camera also triggers the Blur-type and Scene Change-type of tamper detection.
Blur
It is not recommended to alter a camera’s focus, once set. To simulate sabotage of
focus, use a lens-like sheet of glass or plastic, or a transparent container of water, and prop
it in front of the camera during calibration.
Scene Change
After a Multi SA has rearmed an alarm produced by the Scene
Change-type of tamper detection, move the camera back to the scene that the organization
needs to monitor.
TIP!
The Blind type of tamper detection can be used for fixed and for PTZ cameras.
Blur and Scene Change tamper detection are designed for fixed cameras only, not for
PTZ use. Using pan, tilt or zoom functions will trigger Blur and Scene Change.
Calibrating Rows of Mobile Objects
Scene Change is sensitive to large scale changes in a scene. For example, using Scene
Change for a camera that shows many chairs in a row, close by, such as in an airport or
casino, may not be effective. If the DVR learns while people are sitting, that sitting persons
are not to be considered as sabotage, when the chairs empty, the scene may have
changed enough for the DVR to trigger a log entry or an alarm. And if the operator makes
the DVR learn when the chairs are empty, then tamper detection may be triggered when
people sit in the chairs. The same can be said for a row of vehicles that are frequently
moved, such as in a taxi stand or truck depot.
Firewall Reference
Multi-Media sessions (live, retrieval and alarm) are sent to port 10 000, the DVR base IP port.
The value of the base port can be changed by a Multi SA. For port functions, see
.
Table 3-1
Default Transmission Control Protocol (TCP) Ports
Port
a
Name
Use
Needed at …
10 000
b
Base
Live, retrieval and alarm sessions
Multi-Media DVR
operator station
10 001
Maintenance
Maintenance session for configuration,
security, and sending/receiving system
files
Multi-Media DVR
administrator
station
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