Echoes in the Line

Possible cause

• The network is abnormal.
• The echoes are acoustic feedback from the user's microphone.
• The echo cancellation (EC) function is not enabled.
• The device gain is too large.
• The EC setting on the peer device is incorrect.

Solution

1. Verify the network connection.
2. The PSTN user covers the microphone to check whether the echoes disappear.

   If yes, disable the handsfree function.

3. On the UAP NE, run the MOD MRP command to set EC to TRUE.
4. Reduce the device gain by referring to High or Low Call Volume.
5. Contact the peer end engineers to check whether the EC function is correctly configured on the peer device.
6. If the fault persists, collect detailed fault information and related logs, and submit them to the service provider.