Difference between revisions of "Voice quality"
From Kolmisoft Wiki
Jump to navigationJump to search
| Line 14: | Line 14: | ||
# Change it to G729, retest | # Change it to G729, retest | ||
# Check network connection status using ping command from device's location to the server's location | # Check network connection status using ping command from device's location to the server's location | ||
# Make recording on the server | # Make recording on the server of the bad call, listen to it to decide which part sounds bad, localize in which part of the network problem is | ||
<br><br> | <br><br> | ||
| Line 20: | Line 20: | ||
= Poor internet connection with G711 codec = | = Poor internet connection with G711 codec = | ||
When server is not in the same country as clients, and clients use phones/softphones without G729 support, such as eyeBeam, xLite and so on - | When server is not in the same country as clients, and clients use phones/softphones without G729 support, such as eyeBeam, xLite and so on - then you will get poor voice quality. | ||
This is because (soft)phones will use G711 codec, which will use 80 kbps connection. | This is because (soft)phones will use G711 codec, which will use 80 kbps connection. | ||
In order to fix this problem, use only GSM and G729 codecs. | In order to fix this problem, use only GSM and G729 codecs. | ||
Revision as of 10:03, 18 August 2011
Introduction
Voice quality depends on:
- Network connection quality (jitter/delay/loss)
- Codecs
- Phones
Troubleshooting
- Change (soft)phone
- Check what codec device is using
- Change it to G729, retest
- Check network connection status using ping command from device's location to the server's location
- Make recording on the server of the bad call, listen to it to decide which part sounds bad, localize in which part of the network problem is
Poor internet connection with G711 codec
When server is not in the same country as clients, and clients use phones/softphones without G729 support, such as eyeBeam, xLite and so on - then you will get poor voice quality.
This is because (soft)phones will use G711 codec, which will use 80 kbps connection.
In order to fix this problem, use only GSM and G729 codecs.
