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19-8 MAUUI
The second scenario is similar to the first scenario except that treatment is to
be applied at this switch. The UUI from the received call clearing message is
copied into an ISUP ACM message and is used to establish voice path. The
message is transported to the originating ISUP agent before the treatment is
applied.
The following diagram shows the "ISUP to ISUP clearing before ACM
when treatment applied" scenario.
Figure 19-6
ISUP–ISUP Call Clearing before ACM when Treatment Applied
ISUP-ISUP Call Clearing After ACM/Before ANM
There are two scenarios concerning User-to-User Interface (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. The ISUP IAM message with
UUI is sent to the terminating ISUP agent. The terminating ISUP agent
sends an ISUP ACM message to the originating ISUP agent (UUI is
included if received in the ISUP ACM message). The terminating ISUP
agent then sends an ISUP REL 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 diagram shows the "ISUP to ISUP call clearing before
Answer Message (ANM) when treatment is not applied".
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
ISUP IAM (UUI)
ISUP REL (UUI)
ISUP RLC
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