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Frequently Asked Questions |
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What is a video server? |
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A video server digitizes analog video signals and sends digital images directly
over an IP network, such as a LAN, intranet, or the
Internet. It essentially turns an analog video system
into a
network video system, and enables users to view live
images using a Web browser or video management software
on any local or remote computer on a network. The video
server allows authorized viewers from different locations
to
access images simultaneously from the same analog camera,
and from network cameras as they are
added
to the system. |
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What benefits do I get from using a video sever instead of a traditional CCTV
system? |
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Remote Control: Access to live images and remote administration of a network
camera are possible from anywhere using a standard Web browser on any PC.
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Scalability: Due to IP infrastructure, adding more devices to the system is easy. |
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System requirements: Simply connect the network camera to a network. View, record,
and administer from any networked PC. |
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Cabling: Using Standard UTP (unshielded twisted pair) network cable instead of coaxial cable. |
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How many users can access the same VPort at the same time? |
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In general, there is no limitation. However the video quality also depends on the network
bandwidth. To achieve the best effect, the video encoder
will allow 10 users for UDP/TCP/Http connections and
10 users for multicast to be connected. We recommend
using an additional web server that retrieves images
from the video encoder periodically if you need to
host a large number of users. |
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What should I do if I forget the password and cannot log in to the video
sever? |
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Every access to the video encoder needs authentication, unless the admin password
is set as blank. If you are one of the managed users,
you will need to ask the administrator for the password.
If you are the administrator, there is no way to recover
the admin password. The only way to regain access to
video encoder is to utilize the RESET button on the
top panel to restore the factory settings |
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What is pre-alarm recording? |
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The VPort 351 provides a unique pre-alarm video recording function that can
help the video surveillance system obtain a more complete
pre-alarm record. A total of 9 MB of memory
is available for video recording. |
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I'm configuring an event type on the VPort 351 and want to know the length
of the pre and post alarm recordings. |
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A total of 9 MB of memory is available for video recording. The amount of time it takes to record pre-alarm (before
event) and post-alarm (after event) videos depends
on the memory size, video performance settings, and
video content. To determine how long (in seconds)
the pre-alarm and post-alarm videos are, administrators
should run a test when the video content is confirmed. After getting the recorded video file, right click
the file to check the video information, or play the
video to see if the recording time is appropriate.
If you need to modify the recording time, you can tune
the memory size, percentage of pre-alarm recorded video,
and the video performance to get the optimal configuration. |
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What factors affect the bandwidth used by the VPort 351? |
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Use the following simple calculation to estimate the bandwidth requirement:
Image Size per frame x FPS (Frame per second) x (1
+ 3% IP overhead) x (1+30% margins) x 8 bits
As you can see from the equation, both image size and
frame affect the bandwidth. |
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Will my original settings change if I update the VPort 351's firmware ? |
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Updating the firmware will not change the original settings. |
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