session.connection.uuid

Contains the value of the session's UUID (universally unique identifier), which is shared across platforms and the VoiceXML application.

TSS (Telephony Session service generates the UUID, and sends it to VBS (Voice Browser service) via P-Nuance-UUID in the SIP header. Subsequently, VBS sends the UUID to NSS (Nuance Speech Server) using the same header.
VoiceXML applications can access the UUID via the session.connection.uuid variable. A typical use is to pass the UUID into the AAI field during a telephony transfer. For example, <transfer destination=”..” type=”..” aai=”UUID_Value”
Logging: the P-Nuance-UUID header is logged in SIP traces of TSS, VBS, and NSS, VoiceXML applications can log session.connection.uuid.

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