I am trying to configure Ericsson MD110 with RAD Vmux 2100. I have Ericsson MD110 BC11 at the HQ connected to RAD Vmux 2100 using TLU 20. At the remote end I have an MD110 BC9 connected to another Vmux 2100 using TLU 76/3. The problem is that I can make calls from the HQ to the remote, but cannot make a call from the remote end to HQ. Please any help with what to do? Thanks