Hi Gunnaro,
Here is the SSA Trace:
8/17/14 10:13:38 AM-527ms Call Ref = 75001, Originator State = Connected Blind, Type = Trunk, Destination State = Alerting, Type = Target List
8/17/14 10:13:38 AM-527ms Call Ref = 75001, Alerting, Extension = 221, Button = 1
8/17/14 10:13:40 AM-843ms...