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19-14 MAUUI
Figure 19-14
ISUP-PRI Call Clearing before Alerting when Treatment Applied
ISUP-PRI Call Clearing After Alerting/Before Connect
There are two scenarios concerning UUI delivery in a call clearing message
before the terminator sends an indication of answer. In the first scenario, the
originating ISUP agent includes UUI in the ISUP IAM message to invoke
the MAUUI service. A Q.931 Setup message with UUI is sent to the
terminating PRI agent. The terminating PRI agent responds to this message
with a Q.931 Alerting message and an ISUP ACM message is sent to the
originating ISUP agent (UUI is included if received in the Q.931 Alerting
message). The terminating agent then sends a Q.931 DISConnect message
with UUI. If treatment is not applied at this switch, the UUI is transported to
the originating ISUP agent in the corresponding ISUP REL message.
The following scenario shows the "ISUP to PRI call clearing before connect
when treatment not applied" sceario.
297-2521-106 Standard 23.01 March 2001
MWC DMS-250
ISUP IAM (UUI)
ISUP ACM (UUI)
Applied tones or announcements
ISUP REL
ISUP RLC
Q.931 Setup (UUI)
Q.931 Call Proceeding
Q.931 DISConnect (UUI)
Q.931 RELease
Q.931 RELease COMPlete
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