I have a customer that had an onsite tech convert them from PRI to IPflex. The guy quit and their salesman called me to verify if the PRI is being used because they want to now cut it off. What's the best way to verify the PRI is not being used any longer? I am pretty rusty as I have been working with Avaya for several years now with little Cisco work. I know I can look at the route lists and verify what gateway it's hitting. But on the gateway, what's the best way to verify PRI usage/non-usage? Thanks