
E-Comunication in the Classroom:
Classroom Uses
Video Conferencing
iVisit
E-Comunication for the Teacher:
Distribution Lists
E-communication Options
Comparison Chart
Miscellaneous:
Databases in the Classroom
Equation Editor
Elsewhere on this site:
General
Instructional Technology,
Presentation/Web,
Imaging,
Sound,
Video,
Home
|
 |
General Educational Technology
Video
Conferencing over a Network - iVisit
|
iVisit is a simple, free-for-download
program that serves as a connection interface for video
conferencing. It is not materially different from Microsoft's NetMeeting or
CUSeeMe ( also free), with one very notable exception: it uses a
video compression CODEC to greatly decrease transmission size and improve
quality. This is crucial,
since most schools barely have enough bandwidth to handle the Internet traffic
they now have, and video conferencing uses the same pipe (see Things
effecting quality of the video and sound below for hints).
Here's
how it works:
| Hardware |
One computer with a QuickCam or similar, plugged into a
network drop. If you're in a low-connection-speed elementary or middle school, it is
helpful for this network drop to be switched out of the school (if
you don't know what that means, ask for technical assistance from your STC).
Install the QuickCam before you install iVisit. |
| Software |
iVisit, free for download from http://www.ivisit.com
- the software is timed shareware, which means it will "time
out" after two months. When that happens (you'll get a notice and the
software won't work), just go back to
the iVisit website and download and install the newer version right over
the top of the old. |
| Set-up |
Your computer must have a fixed IP address (simply
discovering your DHCP-assigned IP won't work). If you don't know
what this means, then you'll need technical help, since there are a
half-dozen settings that go along with this. If you wish to
video-conference with anyone outside of the FCPS district WAN, you'll need
that fixed IP to be public (again, ask if you don't know).
Make sure you obtain that IP address if you aren't the one to enter it. |
| Installation |
The software install is brainless, just use all of the
defaults (hit <Enter> when it asks something). When you first start
the software after installation, you'll be asked some questions. Again, use
the defaults, though you'll want to give "yourself"
(your computer's iVisit name) a meaningful name for the task you'll be
doing - the name of your class, etc. Make sure
after the startup that iVisit shows a video window with your QuickCam
video showing in it. |
| Configuration |
Go
to Settings/Properties. Check to make sure your chosen name made it into
"Personal Info," and that, under "Video" your QuickCam
is selected (if you don't have one, you can still do a sound-only
conference). Make sure under the "Codec" tab that
"H.263" is checked. Make sure whoever you intend to
conference with has this setting as well. The "Video" tab allows you to set
screen size and quality - it's best to select high quality and a medium
screen size to start with. iVisit will allow you to adjust that
mid-conference if things aren't going well.
|
| Connect |
It's
a good idea to have phone contact with your remote site until you're
confident things are going well - nothing like good-ol' Ma Bell to get
things going!
It is possible to connect through iVisit's server, but
it's preferable not to - like NetMeeting, it opens up your iVisit session
to outsiders. If you're initiating the session, go to File/Connect IP. You must know the remote computer's IP address (or you must have
given them your IP address in advance). If you've forgotten yours...
- Windows 9X: right-click
on "Network Neighborhood," select "Properties,"
click on "TCP/IP" and click "Properties."
- Windows 2000: right-click
on "My Network Places," select "Properties," right-click
on "Local Area Connection," click on properties, click on
"TCP/IP" and click "Properties."
You have no ability to discover the remote computer's IP
- if you're initiating the session, you must simply have it. Enter the name of your remote site, and the IP address.
Click "Save" if you wish to be able to save this for later use.
Then click "Connect." It is then up to the remote site to agree
to the session.
If the remote site initiates the session, you'll get a
window asking if you wish to accept. |
| The Conference |

Here's what you should have. The video frame rate will adjust
depending on the available bandwidth (displayed on the top of the remote
window), which might make things jerky. Since iVisit is by default
sound-priority, you should be able to hear even when the video isn't doing
that well. If the remote sound is garbled or distorted, ask them to adjust
their sound (and vise-versa, of course) - look to see if
things are going into the red - and larger adjustments (allowing direct
control of your sound card) is available through the Settings/Preferences option under "Audio"
tab.
If the sound is so poor that you cannot make it out at all, and adjusting
doesn't help, use the chat window for
text. Sound is not "full duplex" ( going both directions at once) by default - you have to "push
to talk," much like a walkie-talkie. Either click the "Talk"
icon, or just push the <Cntrl> key to talk. Make sure you're
sitting near the microphone (usually the one embedded in the QuickCam),
and keep ambient room noise ( talking, AC noise, etc.) to an
absolute minimum.
Complete access to settings is available by clicking on
the little arrow at the top right of the display window. Make sure you appear at the other end - it's easy to
forget! Look at the "What they see" window. To end the
conference, select the "Disconnect" option from this menu.
Either party can end the conference.
|
| Things
effecting quality of the video and sound |
Bandwidth, bandwidth, bandwidth! If you don't know
what bandwidth is by now, you'll be an expert after this! Here's the
possible restrictions:
- Your school connection speed: If you have a
128 kbps line (many elementary schools do), you'll struggle. If you
can get permission, have your STC shut down your proxy server
(effectively ending all Internet traffic) for the duration of the
session, so you can have the pipe to yourself!
- The remote site connection speed: Same story
there - you could have all the bandwidth in the world, and if the
remote site is slow, the session will not go well.
- The KDE Backbone: All IP traffic (including
your iVisit session) that leaves the cozy Fayette County environment
must go through a gateway to the KDE Internet backbone. That gateway
is typically maxed out (running at 100% of capacity) from 9:30 to 2:30
every day. It does not mean that your session won't work, it just
might encounter problems. If you can schedule around this bottleneck
(early morning or later afternoon), you're in better shape. This does not
effect conferences inside of FCPS.
|
|