Axis 247S Instrukcja Użytkownika Pobierz pdf (Strona 27)

AXIS 247S - System Options

Maximum bandwidth - Specify, in Mbit/s or kbit/s, the maximum bandwidth that the Video Server is allowed

to use on your network. This is a useful function when connecting your Video Server to busy or heavily loaded

networks. The default setting is Unlimited.

Note: When using MPEG-4 as the video format, remember that setting a maximum bandwidth value here may create problems for individ-

ual video streams if the maximum value is less than the sum of the bit rates set for the video streams.

For more information, please see the online help

SOCKS

SOCKS is a networking proxy protocol. The Video Server can be configured to use a SOCKS server to reach

networks on the other side of a firewall/proxy server. This functionality is useful if the Video Server is located

on a local network behind a firewall, but notifications, uploads, alarms, etc., need to be sent to a destination

outside the local network (e.g. to the Internet).

QoS (Quality of service)

Quality of Service (QoS) provides the means to guarantee a certain level of a specified resource to selected

traffic on a network. Quality can be defined as e.g. a maintained level of bandwidth, low latency, no packet

losses, etc. The main benefits of a QoS-aware network can be summarized as:

• The ability to prioritize traffic and thus allow critical flows to be served before flows with lesser prior-

ity.

• Greater reliability in the network, thanks to the control of the amount of bandwidth an application

may use, and thus control over bandwidth races between applications.

The QoS in Axis network video products marks the data packets for various types of network traffic originating

from the product. This makes it possible for network routers and switches to e.g. reserve a fixed amount of

bandwidth for these types of traffic. The following types of traffic are marked:

• live video

• live audio

• event/alarm traffic

• management network traffic.

QoS Settings

For each type of network traffic supported by your Axis network video product, enter a DSCP (Differentiated

Services Codepoint) value. This value is used to mark the traffic’s IP header. When the marked traffic reaches a

network router or switch, the DSCP value in the IP header tells the router or switch which type of treatment to

apply to this type of traffic, for example, how much bandwidth to reserve for it.

Note that DSCP values can be entered in decimal or hex form, but saved values are always shown in decimal.

For more information on Quality of Service, please see the Axis support web at www.axis.com/techsup

SMTP (email)

Enter the host names or addresses for your primary and secondary mail servers in the fields provided, to enable

event and error email messages from the Video Server to predefined addresses, via SMTP.

If the mail server requires SMTP authentication, check the box for Use authentication to log in to this server

and enter the user name and password used for logging in. Several different methods of authentication are

available. See the online help for more information.

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Axis 247S Instrukcja Użytkownika Strona 27