session.connection.aai
This variable provides application-to-application information (AAI) passed at the start of a call. For example, if one application calls a second VoiceXML application using <transfer aai=”string”...>, the AAI string will be available to the second application as session.connection.aai.
Similarly, a VoiceXML application receiving an inbound call containing an AAI string in the message can use this variable to extract the data. For example:
Var AAIString = session.connection.aai
At present, only the NMS (ISDN) and SIP audio providers support this feature.