I'm running a cluster with CUCM BE 6.1.3 and a cluster with CUCM 7.1.2(just upgraded from 4.2 to 7.1). Between these clusters I configured a intercluster trunk. Before the upgrade everything was okay. Now when I dial from the 7.1 Cluster it takes at least 5 seconds until it rings on the other side. This happens just the first time. When I dial a second time the same number it works normal until I erase the directories of the phone(missed calls and so on). Urgent priority is checked and I configured already a Pattern pointing directly to the number I'm dialing. Any ideas why this happens?