Axis Communications Video Server AXIS 241SA - Manual (Page 52)

52 AXIS 241QA/AXIS 241SA - System options
SOCKS
SOCKS is a networking proxy protocol. The AXIS 241QA/AXIS 241SA can be configured
to use a SOCKS server to reach networks on the other side of a firewall/proxy server. This
function is useful if the video server is located on a local network behind a firewall, but
notifications, uploads, and alarms need to be sent to a destination outside the local
network (such as the Internet).
QoS
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 a maintained level of
bandwidth, low latency, and no packet losses. 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 priority.
• greater reliability in the network, thanks to the control of the amount of band-
width 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 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 Code Point) 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.
More information on Quality of Service at 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.