We have a Uniden DECT 6.0 phone with a total of three phones. Recently, we had a problem with our phone not ringing, and found out that the problem was due to our conversion from DSL (2-wire) to COMCAST. But after that problem was solved, our caller ID is not working--and we do get that feature with our COMCAST (Xfinity) service. How can I restore the caller ID feature on our phone? Are there steps to be taken?