The following sequence diagram applies to the ISR configuration in non-SIPREC, pass-through, interactive voice response (IVR) skip mode. The call applies to a percentage-based recording route.

The simple call flow below reflects a single successful call which applies to a route configured for pass-through mode and recording of 100% of calls. The diagram highlights some of the features in the ISR, such as IVR-skip mode. Previously, the ISR architecture required a VoiceXML platform to make routing, recording and availability decisions. This information now resides locally in the Local Route Cache or is referenced in the database through API commands.