Yealink T21P E2 Communication Problem

[Windland_Support]

Hello Everybody,

I need help. I have a problem on my voip system. I'm using the Yealink T21P E2 phones, and what is happening is, when there is a phone call from the outside or even phone calls from the inside from one extention to another, one person is speaking and if there is a noise or the person talks in the other end, it cuts the signal/voice of what i'm saying, and i can't hear or understand what that person just said. In another way...seams that its working in half duplex and not full duplex ? you have to finish the conversation or else what you are saying will be cut.

Hope i'm clear the way i explain the problem.

Anyone can help me with this situation ?

Best Regards
Kevin Guerreiro