We have installed a 100ds1 card into an existing merlin Magix that previously was using a did card. We are able to make and receive calls. Problem is that DID's are not routing to individual extensions. We are using three digit extensions and are setup to receive 3 digit, the carrier (Comcast) is sending 3 digits. All calls are going to the receptionist as the system is not translating properly. On her display in reads DID? on incoming calls. We have gone through the PRI setup on multiple occasions and still have the issue. System is 5ESS and we have asked for options to be custom. They are setup as 5ESS but have no setting for customs. Is the cause of the problem? Anyone have any other suggestion as to what we should be looking/asking for?