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Tips and Troubleshooting
The VIU-323 indicates it is unable to call.
Check the gatekeeper endpoints list and make sure that each endpoint is registered; then
check the VIU-323 registration at both ends.
Check the network connection by pinging the far end VIU-323; if the ping fails, there is a
network problem; if the ping succeeds, turn off the room systems at both ends and turn them
back on; if this still does not work turn off the VIU-323s at both ends and turn them back
on.
Poor audio quality or last syllable repeats continuously.
Video has "artifacts" (areas where the screen does not update properly).
Call drops during videoconferencing.
These problems usually indicate a poor network connection. Try making the call at a lower
speed, if possible, or try making the call during off-peak hours.
If the above suggestions solve this problem, there is a network problem that you should
check.
Cannot place a call through a gateway.
Check the dialing stream to make sure the gateway prefix is correct.
Check that both ends of the call are set at the same bandwidth; if required, adjust the
bandwidth using the correct prefix.
Note: Firewalls will generally prevent calls from going through. Make sure that you are
not trying to send a call through a firewall.
Analyzing Problems
If the problem persists after trying the above solutions, apply the following procedures:
Network Quick Check
Use the Ping command to assess the network connection.
1. Working from a PC or UNIX system that is on the same segment as one of the failing
VIU-323, ping the IP address of the far-end VIU-323. The ping command indicates if
there is network connectivity and provides the round-trip delay time. Run the ping
command a few times or let it run continuously for a minute to see if connectivity is
consistent. Also note the round-trip delay variation.
9-2
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