In the T-1 padding section---RX Gain & TX Gain you can make changes. I've fooled around with this thing on a few DX120s --but I really haven't had too much luck.

Overall, I would say that the Conferencing feature just doesn't work with the PRI. I'd like to see you try some things---maybe it would work for you---but I've more or less given up on the feature---so have my customers.

Before the PRI, they had Centrex lines and used the Conference on the lines---they loved it. It was a real bummer for them to "upgrade" to a PRI. But they do like all the DIDs. Maybe someone else has some ideas. I'm done.

Rockford VoIP