Active-X controls of only 300KB, requiring a much shorter download time, especially over a
dial-up connection.
• Q: Can VersaCam IC Series support multiple users with different resolutions at the
same time?
A: The VersaCam IC Series can support up to 100 users with different resolutions at the same
time. Moreover, VersaCam has progressive mode (image quality builds slowly over time) and
gray mode. As these modes require much less bandwidth than full color images, these can be
accessed by dial-up connections with reasonable results. One user can monitor full resolution
(720 X 486) color images while another user views half resolution (360 X 243) B/W images.
• Q: What is the maximum transmission speed?
A: The VersaCam IC Series compress and transmit up to 30 frames per second, and operates
on a 10BaseT network. However this speed is not necessarily available to every user. Actual
transmission speed may depend on the performance of the user's PC and available network
bandwidth. A few things must be remembered when attempting to calculate transmission
speed:
The maximum transmission speed is 30 frames per second to any individual user. However,
this does not necessarily mean that any number of users can simultaneously receive 30 frames
per second. Although the VersaCam can keep track of transmission of images for up to 100
users simultaneously, it is limited by available network bandwidth. For example, if 5 users are
receiving 10 frames per second, the total frame count that the VersaCam will need to transmit
is 50 frames per second. The total bandwidth required to transmit 50 frames per second (of
10KB images) is within the full bandwidth capacity of a 10BaseT network. Such networks can
typically handle 123 frames of 10KB images per second, assuming no other devices are also
trying to consume that available bandwidth. Listed below are the sizes of a very complex
image (highly detailed and difficult to compress) and a fairly simple image (less detail) at
various resolutions and image quality (compression level) settings:
Image Resolution Quality Complex File Size Simple File Size
720 x 486 9 77KB 24KB
720 x 486 5 49KB 16KB
720 x 486 2 33KB 12KB
360 x 243 9 29KB 10KB
360 x 243 5 22KB 8KB
360 x 243 2 17KB 6KB
180 x 121 9 17KB 7KB
180 x 121 5 12KB 5KB
180 x 121 2 8KB 4KB
VersaCam IC-360 User’s Guide
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