User`s manual

VPort 25 User’s Manual Frequently Asked Questions
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Q: How many users are allowed to access the video encoder at the same time?
A: Basically, 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.
Q: What is the IP camera’s video rate?
A: The codecs can process 30 frames per second internally. However the total performance is
subject to many coefficients, as listed below:
1. Network throughput.
2. Bandwidth share.
3. Number of users.
4. More complicated objects result in larger image files.
5. The level of your PC or notebook that is responsible for displaying images.
In general, the transfer rate for a general local network environment can achieve over 800
kilobytes per second and approximately 10 to 20 pictures of a normal environment per second.
Q: How can I keep the IP camera as private as possible?
A: The IP camera is designed for surveillance purposes and has many flexible interfaces. The
user authentication and special confirmation when installing can keep the IP camera from
unauthorized access. You may also change the HTTP port to a non-public number. Check
the system log to examine any abnormal activities and trace the origins.
Q: How fast will the IP camera check the status of digital inputs?
A: The IP camera will check the input status in less than half a second.
Q: Why can’t I access the IP camera when I set up some options in the application?
A: When the IP camera is triggered by events, video and snapshots will take more time to
write to memory. If the events occur too often, the system will always be busy storing video
and images. We recommend using sequential mode or an external recorder program to
record motion pictures if the event is frequent. If you prefer to retrieve images by FTP, the
value could be smaller since an FTP server responds more quickly than a web server. Once
the system is too busy to configure, use the restore factory default and reset button to save
the system.
Q: The image is not clear enough. Is anything broken?
A: The lens can be focused by rotating the outer ring. Rotate it clockwise or counter-clockwise
to focus near or far.