Local Area Networks
Using existing LAN with little upgrade to
capacity?/B>
When there is enough capacity on the network, when your
application requires little security, simply add network video equipment onto
the existing network. You can further optimize your network using technologies
such as VLAN or Quality of Service.?BR>
Good technologies to use in a LAN?/B>
VLAN or virtual local area network is a "logical" way to
separate the surveillance network from the general-purpose network. The
router/switch can be configured to provide a range of IP addresses with assigned
features. In the example above, the router/switch manages the IP addresses,
bandwidth and security allocated to those on VLAN A (with access to video) and
VLAN B (general purpose traffic). No matter where users might be physically
located, all those in VLAN A will have access to the video while those on VLAN B
will not.
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Quality of Service (QoS) ensures available bandwidth for
surveillance equipment on the general-purpose network. You can set the level of
priority for specific ports on a switch. Connections to network cameras and
storage servers should be set at high priority while desktops can be set for low
priority to ensure that bandwidth is always available for critical surveillance
video when needed.
Using existing Wide Area Networks
Use VPNs or virtual private networks, which enable data to be
sent in encrypted form. They are ideal for surveillance systems.
Distributed storage: You can set local storage sites to
record at higher frame rates, while the monitoring center at headquarters need
only record at lower frame rates.
Nightly transfers of recorded material is possible.
Define the scene and type of network video products required
Application requirements: features, recording and storage needs
Assess your network needs: local area network (LAN) and wide area network (WAN)
Existing networks
New, dedicated IP-Surveillance network, together with the general purpose
Dedicated IP-Surveillance network
