Cisco 7960g Feedback Problem

[huzer1]

I have six cisco 7960g's in my office, they are going to the 3cx server version 3.1.2434.0 and then to a Audio Codes MP-114 Gateway. The issue is on 1-2 phones in the office there is significant feedback i.e. You hear yourself talking in the converation, can anyone offer any advice on this?

 

[LLangston]

In the Audio Codes make sure the EchoCanceller is Enabled and you may want to set the value of the ECDCRemoval to 1.