I have found a problem that involves the x21 4.0T PBX and CallPilot (2.02). If EEST and DTMF are both set to yes. then this creates a transfer problem in applications in callpilot. The problem will occur as RNA or "Your call can not be completed at this time" message. This occurs after you go through the menu and choose an option that involves a transfer block.
Changing DTMF=NO corrected the issue on both sites.
Changing DTMF=NO corrected the issue on both sites.