Did the changes to the recording values help? I am working on the same problem.Try to see if I can boost the gain on the DS1 trunk coming into my G3, I haven't found any controls yet.

I had this same problem. The fix is to unistall the tsp get the G3 switch setup and ports defined and then reinstall the TSP.At that point the IP ports will be 9-16 as the need to be.