Nortel DMS-250 - Special Cases; ASE

MAUUI 19-17
Digital Switching Systems DMS-250 ISDN Reference Manual MWC14 (CSP14)
Figure 19-18
PRI-ISUP-PRI Call Clearing Received before Connect
ISUP IAM (UUI)
ISUP REL
ISUP RLC
Applied tones or announcements
ISUP CPG(UUI)
Q.931 Call Proceeding
Q.931 Setup (UUI)
Q.931 DISConnect (UUI)
Q.931 RELease
Q.931 RELease COMPlete
Q.931 Call Proceeding
Q.931 Setup (UUI)
Q.931 DISConnect
Q.931 RELease
Q.931 RELease COMPlete
Q.931 Progress (UUI)
Applied tones or announcements
ISUP ACM (UUI)
Q.931 Alerting (UUI)
Q.931 Alerting (UUI)
MWC DMS-250
MWC DMS-250
Special Cases
ASE
Answer Supervision Enhancements (ASE) allow MWC DMS-250 switches
that are attached to gateway switches to send ACM and ANM, instead of the
normal ACM only, to establish voice path for suppcode and/or digit
collection. ASE is based on the ASE_ACTIVE boolean in table TRKGRP
for the originating agent. ASE functionality was originally introduced for
ISUP RLSR OPT2 originating agents (AD7746: Answer Supervision
Enhancements), but was later developed for ISUP IMT (AD8380: Answer
Supervision Enhancements for ISUP IMTs) and ETSI PRI (AD8728:
Answer Supervision Enhancements for ETSI PRI). This feature is not
supported for ETSI PRI trunks and concentrate on the interworking of these
features with respect to ISUP RSLR OPT2 and ISUP IMT originating
agents. The following diagram shows an example of the message flow of a
call with ASE active.