I am posting this to see how many of you have converted to PRI lines and how you are handling them in the studio. What we have is an Allworx digital phone system, connected to a PRI system for the calls. We use an interface to break the digital circuits into analog "fax" lines, and on to the studio on copper. Has anyone else had an issue getting them to ring properly in the studios like the old systems used to. Line one is busy, so it goes to line 2, then line 3, etc...rollover until all lines are full then deadend and busy signal the callers until a line opens. Ours likes to fill all lines during contests, then continue looking throughout the building to whatever extension is open and rings there. Nobody, including the installers or vendors, seem to know what a choke circuit is anymore, yet i have to think that stations in larger cities are using this type of set up.