User's Guide

20 Active Tests 66
7signal Ltd, Panuntie 6, FI-00620 HELSINKI, FINLAND, [phone], [e-mail], www.7signal.com
7signal Sapphire Carat Carat User Guide Release 3.0
a. G.711 PCM Linear 16 = 64 kbit/s
b. G.729 GSM data = 8 kbit/s
4. Select an optional error correction method (Stream FEC)
5. Configure sender information:
a. Enter a port for the MOS test (Local port)
b. Enter the test duration in seconds (Send time)
c. Enter the packet interval in milliseconds (Stream interval)
d. Enter the packet size in bytes (Packet size)
e. Enter the sampling window size in seconds (Sampling interval)
6. Configure the receiver information:
a. Enter a port for the MOS test (Receiver port)
b. Enter the receiving window size in seconds (Window size)
c. Enter the sampling interval in seconds (Sampling Interval)
d. Enter the size of the dejittering buffer (Dejittering Buffer)
e. Enter the connection timeout in milliseconds (Timeout)
7. Enter the traffic class (licensed feature only)
8. Select “Execute”
9. The results are displayed in a new window in the selected format
Sample result set:
Elements of the results image:
• MOS result: The distribution of MOS values related to test duration. The color coding
indicates quality.
• Loss Rate: Packet loss as a function of test duration.
• Average Jitter: Variation in delay as a function of test duration.
• Codec: The distribution of codecs used during the test. If only one result is visible, the
codec was not changed during the test.
• Levels: Signal and noise levels during the test, averaged over the duration of the test.
• SNR: Signal/noise ratio during the test, averaged over the duration of the test.