Operator has ETJ-16DD with two Add-on modules. All trunks are on PRI. Restricted phones would like to call her and receive dial tone for one unrestricted call. System is about 10 years old. I have been doing adds, relocates with very little know-how. Previous vendor had converted from copper trunks to PRI. With copper trunks Operator could transfer dial tone using a loop button, I believe.