I would look into the ACD for the way the call is presented to the ACD. Also if your PRI is working don't reinstall the keycodes (if they are not in, the PRI won't work at all). If your switch is version 4.1, try the restarting feature in the Maintenance heading. I've had problems after making many changes in the switch, "rebooting it" usually cures the symptoms. If you have a lot of incoming traffic into the switch, usually that slows the switch down, for example, if you grab an outside line, it takes forever to get dial tone, if you invoke a feature, it takes a long time for it to complete the command, it's like the phone gets "hanged" like PC's when you open windows and they stand there, and after a little while does their thing. If traffic is the problem, I'll would definetly go with something more powerful like an Option 11C or similar switch. Good luck!