We have Definity G3r V9. My Avaya business partner has told me that activating the MCT feature "nails up" the trunk the person is calling on... I'm not sure what this means. I know I can get a printout from ASA. Does this nailing up the trunk help my local telco (Qwest) identify where the call is originating? They have an annoyance call bureau, and have been told we call them AFTER THE FACT. Then what if the person is using caller ID blocking... Is there any way around this in the switch? Thanks for any help anybody can pass on.