We currently have VRUs using Dialogic analog integration. We are upgrading to digital Dialogic cards, model D/82JCT. I can call any of my channels and the VRU answers. However, the VRU won't respond to any digits from any Rolmphone. If I call out and back in via trunks it's fine, as it is from analog phones dialing directly. When I call another Rolmphone from an RP400, answer, then enter digits from the RP400 I get 'not possible' on the display. I don't hear anything on the receiving Rolmphone - but do if I call an analog phone, as expected. I wonder if there's a parameter or other setting that needs to be modified. We have many of the same digital VRUs connected to Rolm 9751s where the integration works fine.