21
>
Event management and intelligent video:
Consider requirements for I/Os and intelligent video
functionalities such as video motion detection, audio detection and active tampering alarm. These
features can help reduce bandwidth and storage consumption as they enable only actionable data to
be sent upon alarm.
>
Advanced security and network management:
Axis video encoders offer many ways to secure
access to video. Security features include multi-level password protection; IP address filtering, which
gives or denies access rights to defined IP addresses; HTTPS encryption, which provides a secure
channel between the video encoder and application; and IEEE 802.1X to control network access. Net
work management features include Quality of Service (QoS), which helps secure the necessary band
width for streaming video and control commands over a network; and support for Internet Protocol
version 6 (IPv6) and standard IPv4 addresses.
>
Video management software:
Axis video encoders are supported by a wide range of application
software, including AXIS Camera Station.
Network
The next consideration to make is assessing your network needs.
Network switches allow devices such as network cameras, servers and PCs to communi-
cate with each other to share information and, in some cases, a common Internet con-
nection. Network designs can take many forms and may vary in terms of performance
and security.
First, determine what your company is using the network for and how congested your
local area network (LAN) or wide area network (WAN) is.
If you are implementing a smaller surveillance system involving 8 to 10 cameras, you
should be able to use a basic 100-megabit (Mbit) network switch without having to
consider bandwidth limitations. Most companies can implement a surveillance system of
this size using their existing network.
If you are implementing 10 cameras or more, you should try to estimate the load on the network using
a few rules of thumb:
> A camera will use approx. 2 to 3 megabits of bandwidth when configured to deliver high-quality
images at high frame rates.
> With more than 12 to 15 cameras, you should consider using a switch with a gigabit (Gbit) backbone.
If a gigabit-supporting switch is used, the server that runs the video management software should
have a gigabit network adapter installed.
Determine the pattern of congestion levels over a given period to find out if you have to install addi-
tional bandwidth capacity on your network or whether you can make use of the same network as for
general business activities. It may be that the network traffic drops off during nighttime and weekends—
the times when you may want to activate the video surveillance system. The usage pattern will help you
to determine whether you can a) simply use the same network infrastructure for your general purpose
needs as for your surveillance needs, or b) use a combination of existing general purpose network as well
as a new network for IP-Surveillance. If additional network capacity is needed, new cabling is normally
not needed since adding a switch or reconfiguring the patch panel may solve the problem. One tool that
helps estimate bandwidth usage is the AXIS Design Tool, which is available at www.axis.com/products/
video/design_tool/. See also section 5.d for more about bandwidth control.
2.3.
Summary of Contents for IP-Surveillance system
Page 49: ...49 ...
