Nortel DMS-250 - Page 348

19-6 MAUUI
297-2521-106 Standard 23.01 March 2001
Figure 19-3
PRI–PRI Call Clearing before Connect when Treatment not Applied
Q.931 Call Proceeding
Q.931 Call Proceeding
Q.931 Setup (UUI)Q.931 Setup (UUI)
Q.931 DISConnect (UUI)
Q.931 DISConnect (UUI)
Q.931 RELeaseQ.931 RELease
Q.931 RELease COMPlete
Q.931 RELease COMPlete
Q.931 Alerting (UUI)
Q.931 Alerting (UUI)
MWC DMS-250
The second scenario is similar to the first scenario except that treatment is
applied at this switch. The UUI from the received call clearing message is
copied into a Q.931 Progress message and sent to the originating PRI agent
before the treatment is applied.
Figure 19-4
PRI–PRI Call Clearing before Connect when Treatment Applied
Q.931 Call Proceeding
Q.931 Call Proceeding
Q.931 Setup (UUI)Q.931 Setup (UUI)
Q.931 DISConnect (UUI)
Q.931 DISConnect
Q.931 RELease
Q.931 RELease
Q.931 RELease COMPlete
Q.931 RELease COMPlete
Q.931 Progress (UUI)
Applied tones or announcements
Q.931 Alerting (UUI)
Q.931 Alerting (UUI)
MWC DMS-250