Specifications

Troubleshooting the SCOPIA Elite MCU | 68
RADVISION | Administrator Guide for SCOPIA Elite 5100 Series MCU Version 7.7
Step 4 Monitor the router response for at least 20 minutes.
Figure 5-3 Example of a Router Response in a Ping Test
Step 5
(Optional) You may display statistics by pressing CTRL + Space.
Figure 5-4 Example of Router Statistics as Displayed in the Ping Test
Press CTRL +C to hide statistics.
Step 6 Use the router response to perform the following:
a. Verify that there is no packet loss.
The packet loss that is higher than 1-2% causes poor video quality.
b. Verify that the steady jitter (the difference between the minimum and maximum round trip
times) is not higher than 30-50 msec.
c. Verify that the minimal delay (round trip time) for QoS-tagged packets in not higher than
300-400 msec.
Step 7 Close the command line window.
Step 8 Verify that enough bandwidth is dedicated to videoconferencing traffic and this bandwidth is
available at all times.
Step 9 Verify that there is enough bandwidth for daily activity traffic on WAN IP links apart from
bandwidth dedicated to videoconferencing.
Step 10 Use a network sniffing application to perform the following:
• Verify that the one-way delay is not higher than 100-150 msec.
• Verify that the delay is the same for both directions.
Step 11 Verify that the Auto Negotiation preferred setting is selected for all routers and switches working
in 100 Mbit/Full Duplex mode.
Step 12 Verify that the MCU LAN ports are synchronized with the switch: