Symptom
You might have voice volume, echo, and voice quality issue.
Checklist
Voice Volume issue
1. GSM trunk volume setting. Adjust the volume according to your issue. TX Volume is for outgoing voice, and RX Volume is for incoming voice.
- S-Series
- GSM Gateway
2. Phone volume setting. Find the related phone settings and adjust according to your issue.
If issue persists after finishing the checklist, please post us the following information via our support portal.
- Problem description. Please describe which party would have volume issue.
- Result of each step in the check list.
- Screen capture of the volume settings.
- GSM channel capture How to Get GSM Channel Capture and PCAP dump capture How to Get PCAP Dump Capture. (It’s better to include the same call in the 2 captures.)
Echo Issue
1. Echo Cancellation. Try to disable or enable the option on Yeastar device to compare the difference.
- S-Series
- GSM Gateway
There is no Echo Cancellation on web.
2. Swap phone. Swap an IP phone to test echo.
3. Volume settings. Decrease the TX Volume from the default 40% to different percentage till custom value -8. Compare the difference.
If issue persists after finishing the checklist, please post us the following information via our support portal.
- Problem description. Please describe which party would have echo issue.
- Result of each step in the check list.
- Screen capture of the volume settings.
- GSM channel capture How to Get GSM Channel Capture and PCAP dump capture How to Get PCAP Dump Capture. (It’s better to include the same call in the 2 captures.)
Voice Quality Issue
1. Signal interference. Check if there is Wifi or other radio device is near the Yeastar device.
2. Signal strength. Check the signal strength on the GSM trunk settings page, or check the signal strength on a mobile in the same place where the Yeastar device installed.
3. Ground connection. Check if your power circuits have been connected with ground.
4. Network environment. Check if your network exists heavy traffic.
5. Jitter Buffer. If you have voice cut issue, you could try the option. (For S-Series only)
6. Swap phone. Swap an IP phone to compare the voice quality.
7. Call traffic. Check if you have heavy call traffic for Yeastar device.
If issue persists after finishing the checklist, please post us the following information via our support portal.
- Problem description. Please describe specifically how the voice quality issue is.
- Result of each step in the check list.
- Screen capture of the Jitter Buffer settings if you have configured.
- GSM channel capture How to Get GSM Channel Capture and PCAP dump capture How to Get PCAP Dump Capture. (It’s better to include the same call in the 2 captures.)
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