I’ve just installed a new * for one of the department (replacing their old analogue PBX). The users keep complaining that they can hear themself even they are talking within same PBX (e.g. SIP ext to SIP ext) or PSTN call. Initially I thought that was caused by the poor quality phone without echo cancellation feature. But after changing to some other (more expensive) phones, I can still hear my echo.
I’m wondering is there parameter in * that can eliminate the echo?
below is my zapata.conf