Cellular Port Voice Quality Issue


When you make call via the cellular 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 as well as related with the practical line. 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. Swap the IP phone to test.

  2. Check if signal is good on the trunk page.

  3. Try different SIM cards on the cellular port. And test the SIM card on your cellphone to compare.

  4. Check antenna connection of the cellular port.

  5. Swap slot to install the cellular module on the same motherboard/EX08 board to test.

  6. Swap a cellular module, if you have one.

  7. If failure happens on above 6 steps. And if the PBX is installed with the other EX08 board, try to install the cellular module on the other EX08 board and test.

Logging: (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 cellular port capture including the issue.

Have more questions? Submit a request


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