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Reality: If you will only have a few cameras, then an existing
Fast Ethernet (100 Mbit) office network will normally meet any
transmission demands. For comparison, a typical single network
camera video feed is 0.2 to 2.0 Mbit/second depending on compression,
size and frame rate. For any larger deployment of network cameras
and video servers, we recommend a separate network for the video.
Think of it like rail transportation—once the existing track becomes
too congested, you simply build another set of tracks. For
enterprise size, your local network core would probably be running
at Gigabit Ethernet. With today’s network switches and routers,
separating networks is easy. In addition, other specific steps can
be taken to ensure that IP-Surveillance technology can be integrated
into an organization’s operations and will not tax the network.
Additionally, because of the local
intelligence inside a network camera, the camera can actually decide
which frame rate to send over the network based on events, motion,
time of day, etc. So in many cases the camera will only send video
over the network if the video is worth recording, which might only
be 10% of the time. 90% of the time nothing is being transferred
over the network.
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