UUI Treatment set to service-provider forwarded ASAI provided user data in a non-shared codeset 0 UUI IE and all other user data in codeset 0 Facility IEs as MSI. In this case the Max. Size of UUI Contents field is not relevant and the Shared UUI Feature Priorities page does not show nor apply. This setting is used for QSIG trunk groups to pre-R6.3 DEFINITY switches for compatibility with existing ASAI applications or when service-provider functionality is wanted (e.g., where shared forwarding of the new data items is not required or for trunk groups to other vendor switches that need user information from the trunk group in a non-shared UUI IE such as provided by ASAI). Incoming calls received with shared data (shared UUI IE) routed out over a QSIG service-provider trunk group, will separate any ASAI provided user data included in the shared UUI IE and forward it in a non-shared UUI IE.

UUI Treatment set to shared will forward all user information including ASAI provided user data in codeset 0 Facility IEs as MSI in the SETUP or DISCONNECT message. The UUI IE is never included over a shared QSIG trunk group. In this case, the Max. Size of UUI Contents field and the Shared UUI Feature Priorities page do not apply. This is the normal setting for QSIG trunk groups to the switch when information forwarding is required and must be used for BSR.