Axis Network video Manual page 100

100 CHAPTER 11 - VIDEO MANAGEMENT SYSTEMS
> Activate output port: The output port(s) on a network camera or video encoder can be
connected to external devices such as alarms. (More details are provided below on output
ports.)
> Send e-mail notification: This notifies users that an event has occurred. An image can also
be attached in the e-mail.
> Send HTTP/TCP notification: This is an alert to a video management system, which can then,
for example, initiate recordings.
> Go to a PTZ preset: This feature may be available with PTZ cameras or PTZ domes. It enables
the camera to point to a specified position such as a window when an event takes place.
> Send an SMS (Short Message Service) with text information about the alarm or an MMS
(Multimedia Messaging Service) with an image showing the event.
> Activate an audio alert on the video management system.
> Enable on-screen pop-up, showing views from a camera where an event has been activated.
> Show procedures that the operator should follow.
In addition, pre-alarm and post-alarm image buffers can be set, enabling a network video prod-
uct to send a set length and frame rate of video captured before and after an event is triggered.
This can be beneficial in helping to provide a more complete picture of an event.
Input/Output ports
A unique feature to network cameras and video encoders, in comparison with analog cameras,
is their integrated input and output (I/O) ports. These ports enable a network video product to
connect to external devices and enable the devices to be manageable over a network. For
instance, a network camera or video encoder that is connected to an external alarm sensor via
its input port can be instructed to only send video when the sensor triggers.
The range of devices that can be connected to a network video product's input port is almost
infinite. The basic rule is that any device that can toggle between an open and closed circuit can
be connected to a network camera or a video encoder. The main function of a network video
product's output port is to trigger external devices, either automatically or by remote control
from an operator or a software application.