Echo

[allen@millermanor.net]

I've got a recent system install that has Yealink T42Gs along with 3CX pbx.

The customer describes some echo sound in their handsets. The outside party does not hear this. When I went onsite to observe I see that rather than this being an echo that repeats - it is more like a highly sensitive mouthpiece picking up the ambient room noise and playing it back one time through the ear piece.

This happens on all the phones in the office.

Is this a known situation?

Is there any way to reduce the sensitivity of the mouthpiece or microphone?

Thanks.

Allen