I have a strange problem with my AddPac200 (h323) and CCM 5.1. AddPac cann't establishe incoming call from CCM (no ringtone back to CCM). I try to debug AddPac and find that it cann't work using faststart with CCM. Call from AddPack to CCM work fine. Incoming/outcoming call from AddPack to C2811 work fine with faststart. If C2811 can work with AddPac, why CCM cann't?