If the system is not licensed for PRI that is possible. You should be able to find that information in the system. In the new world it is all "comscendo" licenses that can be used for anything. I can't remember back that far, but I think you would need to have enough "port licenses" to cover what you need to do, and you would need to be licensed for PRI as a feature.
Sorry - it has been a long time for that!
Don Bruechert, Voice Comm Analyst II
CareTech Solutions @ Holy Family Memorial
Manitowoc, WI, USA