Strange pinging noise during calls

I have rebuilt my * box and have run fxotune and messed around with my echo settings and echo is no longer really an issue ? I have a bigger problem :smiley:

During a call I hear this pinging noise almost like a sonar bounce. I can hear it but the person at the other end cant but if Im talking during the noise they dont hear what I was saying at that time. It doesnt happen all the time and only maybe 2 times every call but its extremely annoying.

Anyone know what it is or more importantly how to get rid of the thing. I thought it might be an echo training tone or something or am I barking up the wrong tree.

Thanks

we too experienced the same issues, it has got solved after doing fine tuning the pechotraining and echo cancelling parameters.

How did you do that - what commands did you run?

adjust the echocancell and echo trainiing parameters in zapata.conf , if you use tdm cards with fxo trunks