We have CallManager 5.12.3000-2. There is one particular ext 9180 having issue. Internal caller dial this ext and have to wait for 5 sec before the caller hear the ring back tone and the call will finally go through. External caller does not experience the same problem. all other ext 91xx work fine. I tried to delete this ext and re-create it, same problem. I tried to add 9179 and 9181 to this phone. Both number work fine. 9180 work fine in the past, this problem started to happen yesterday.
By the way, it is a 7971 phone.
does it take 5 seconds for the call to go??
or it goes immediately and 5 seconds later the phone rings??
i would think you might have something overlapping with that DN, check the route plan report and unassigned DNs (do not look only for the exact number, most of the times is something with wildcards). you can use DNA
If T302 is set to 5 then most probably this is an overlapping issue.
if this helps, please rate