I have a customer that has a G3 R11 which we are connecting to a Nortel Option 81 using a Point to Point T1. We have programmed both switches and are getting calls back and forth between them with no problems. The problem is that calls start droping. I am sure this is a timing issue between the two switches but I don't know how to make the definity get timing on that T1 from the Nortel in other words a Master/Slave arrangement. The trunk group is set up as tie with all 24 channels as members. Any help would be greatly appreciated.