A method of tracking calls received within a call center is disclosed. A call is received within a call center switch that is connected to a call center via a host interface link (HIL). The call center has an automatic call distributor (ACD) server and interactive voice response (IVR) server, which is...http://www.google.de/patents/US20050163304?utm_source=gb-gplus-sharePatent US20050163304 - Integrated ACD and IVR scripting for call center tracking of calls