Symptom: when you make call via the FXS port, you would meet the voice quality issue. For instance, voice cut, echo, unclear voice etc. Usually, it’s 100% hardware issue. It’s also could be setting issue. Before it is identified as hardware issue, please seek advices from our support.
Check List:
* If it is not S-Series, please skip the steps included with EX08 card test.
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Check the advice from Yeastar support about the settings.
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Swap the FXS port to test.
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Swap the analog phone to test.
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Swap slot to install the S2 module on the same motherboard/EX08 board to test.
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Swap a S2 module, if you have one.
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If failure happens on above 3 steps. And if the PBX is installed with the other EX08 board, try to install the S2 module on the other EX08 board to test.
Log & Packet Capture: (If you can’t resolve the issue, please submit the following information to Yeastar)
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Post us the test result of the check list.
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Post us the FXS port capture including the issue.
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