FXS Port Voice Quality Issue

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.

  1. Check the advice from Yeastar support about the settings.

  2. Swap the FXS port to test.

  3. Swap the analog phone to test.

  4. Swap slot to install the S2 module on the same motherboard/EX08 board to test.

  5. Swap a S2 module, if you have one.

  6. 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)

  1. Post us the test result of the check list.

  2. Post us the FXS port capture including the issue. 

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