Bedienungsanleitung Axis IP-Surveillance system (Seite 45 von 50) (Englisch)

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Scaling up your surveillance system

AXIS Camera Station enables you to easily add more cameras to the system, while the client application

allows you to work with multiple AXIS Camera Station servers.

Adding more cameras

AXIS Camera Station allows you to easily add cameras to the system simply by using the Add function.

You can add as many cameras to the system as the purchased license allows. If the number of cameras

exceeds the number allowed under license, simply purchase an add-on license.

Network considerations

When implementing 10 cameras or more, 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. The bandwidth usage will be significantly lowered using H.264 or MPEG-4

streaming compared with Motion JPEG.

> In a system with more than 12-15 cameras, consider using a switch with a gigabit backbone. If a

gigabit-supporting switch is used, the server that runs the video management software should have

a gigabit network adapter installed.

Consider also using Quality of Service (QoS) on your network. Quality of Service enables reservation of

network capacity and prioritization of mission-critical surveillance. Some Axis network video products

support QoS.

Figure 8.2.a. The above is an example of a QoS aware network, where Router 1 has been configured to devote a certain amount of

maximum bandwidth usage to streaming video, FTP traffic, and HTTP and all other traffic. The maximum usage applies only when

there is congestion on the network. If there is unused bandwidth available, any type of traffic can take advantage of it. (In an ordi-

nary or non-QoS network, there is no reserved bandwidth usage for different types of traffic, so when there is network congestion,

there is no guarantee that video streams will be able to maintain the desired frame rate.)

Server considerations

If you are adding more cameras, you should monitor the server’s CPU usage so that it does not exceed

its limitations. One hard disk is suitable for storing recordings from six to eight cameras. With more than

12-15 cameras, at least two hard disks should be used to split the load. For 50 or more cameras, the use

of a second server is recommended. The AXIS Camera Station Client will be able to switch between dif-

ferent AXIS Camera Station servers.

For more information, please refer to the hardware recommendation sheet on page 31.

8.1.

8.2.

100 Mbit

Switch 1

Switch 2

Router 2Router 1

PC 1

PC 2

PC 3

Camera 1

Camera 2

100 Mbit

FTP 2

Video 5

HTTP 3

10 Mbit

FTP

Video

8.3.

Number of cameras Considerations

1 to 15

1 disk

15 to 30

2 disks

30 to 40

3 disks

40 to 50

4 disks

50+

2 servers

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