Hi Cecile, I am wondering about the specific configurations inside the codec in order to get the AEC to work. I have connected the REF of the Mediaport to a Line In on the Cisco codec, but I still get echo. Are you able to clarify at all about this?

Thanks for the answer! Can you clarify the connections here? Is it HDMI out from the secondary codec to the HDMI input of the primary codec? Is the secondary codec still connected to room control, for example if there is a third part processor, or do...

Thanks for the answer Brian. Can you let us know how the second "slave" codec is connected to the system? Johnny