OnSSI NetDVMS Rev 6.5
Administration
On-Net Surveillance Systems, Inc. | 222 Route 59, Suite 303, Suffern, NY 10901 | T: 845-369-6400 | F: 845-369-8711 | www.onssi.com | [email protected] | page 83
Using Dedicated I/O Devices
In addition to IP video camera devices and IP video encoder devices it is possible to add a number of
dedicated I/O (input/output) devices to NetDVMS (see
How to Add a Device
). For information about which
I/O devices are supported, refer to the release note.
When such I/O devices are added, input on the I/O devices can be used to generate events in NetDVMS,
and events in NetDVMS can be used for activating output on the I/O devices. This means that I/O devices
can be used in your events-based system setup in the same way as a camera.
Note: When using some I/O devices it is necessary for the surveillance system to regularly check the
state of the devices' input ports in order to detect whether input has been received. Such state checking
at regular intervals is called polling. The interval between state checks, called a polling frequency, is
specified in the
Advanced window
. For such I/O devices, the polling frequency should be set to the lowest
possible value (one tenth of a second between state checks). For information about which I/O devices
require polling, see the release note.
I/O Setup
I/O Setup Window
Note: Access to features in the Administrator application, including those described in the following, may
require administrator rights.
The I/O Setup window lets you define input events, VMD (Video Motion Detection) events and output for
devices on your surveillance system.
When events occur, they can trigger one or more actions:
•
Input events occur when input from an external input unit is received on a device's input port, for
example when an external sensor detects that a door is opened. Some devices also have their
own capabilities for detecting motion, for detecting moving and/or static objects, etc. (configured
in the devices' own software; typically by accessing a browser-based configuration interface on
the device's IP address), in which case such detections from the device can also be used as input
events.
•
VMD events occur when NetDVMS detects motion on a particular camera.
•
Outputs are used for activating external output units, for example for switching on lights or
sounding a siren.
The I/O Setup window is used for defining which input events, VMD events and outputs should be
available on your system.
Input and VMD events can be used for triggering outputs or for triggering various actions on the
surveillance system itself, such as for starting or stopping cameras (configured in the
Camera/Alert
Scheduler window
) or for moving a PTZ camera to a particular preset position (configured in the
Event
window (for PTZ preset positions on event)
).
Once you have defined input events, VMD events and outputs, you are able to associate specific input
events or VMD events with specific outputs in the
I/O Control window
, so that, for example, lights are
Содержание NetDVMS 6.5
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