Rtp Information Output - NEC Univerge SV8500 Operation And Maintenance Manual

12. RTP INFORMATION OUTPUT

This feature is used to output log that includes the causes of low voice quality and abnormal status of IP device.
Therefore, network administrator will be able to understand its cause and figure out how to solve the problem.
For more information such as available firmware version, please refer to [R-58] RTP Information Out-
Note 1:
put in Data Programming Manual - Business.
• Communication Log Function
A history (containing speech time, information of opposite party, IP address, MAC address, and voice qual-
ity) per speech is collected and output.
If a user makes a complaint about voice quality, the appropriate data can be retrieved in the form of speech
logs, which can be used to confirm and investigate the cause.
• Fault Log Collection Function
When an event such as autonomous reset occurs on terminals, the system outputs the reset factor and time
of the cause. If it is caused due to packet fault, the system also outputs the number of times that packets
have been sent/received/retransmitted, which will be useful to investigate the cause.
If a user makes a complaint about the terminal control and its status, the appropriate data can be retrieved
in the form of speech logs, which can be used to confirm and investigate the cause.
Communication Log Collection Function and Fault Log Function are available depending on termi-
Note 2:
nals. Please refer to [R-58] RTP Information Output in Data Programming Manual - Business for more
detailed information.
• .Warning Tone Playback for RTP Packets Communicating Error
Warning Tone is generated to indicate a deteriorated voice quality due to the RTP packets loss reaching the
predetermined threshold. Beeps are heard with tone duration of 120 ms and pause of 100 ms. The packet
loss threshold is 20% of total expected packets within 3 consecutive seconds or more. Packet loss is
checked every 1 second. If RTP packet loss continues the Warning Tone will be not generated one after
another but 10 seconds after the first one.
RTP Packet Loss Check Period
Warning Tone Playback
Conditions
Warning Tone Form
Received RTP Packet Loss Threshold
Reported Packet Loss Interval
Time Between Warning Tone Beeps
Tone
Pause
CHAPTER 2
1 second
20% of expected packets
3 seconds or more
10 seconds
120 ms
100 ms
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Operations of SV8500 Server