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Feature interaction 7-53
If the terminator is ISUP, then the ATP is copied in the outgoing IAM. If the
terminator is PRI, then the ATP is converted into Q.931 format information
elements and sent in the SETUP message to the terminator.
The RLT/ATP feature affects redirect and bridging calls and provides the
ISDN with the ability to transport the ISUP ATP for calls that interwork with
ISUP RLT trunks.
When a FAR message is received with ATP at a DMS-250, the outgoing
IAM from the DMS-250 copies the ATP from the incoming FAR to the
outgoing IAM for ISUP termination.
Within the DMS-250 Integrated Services Digital Network, the originating
and terminating nodes provide the interface between PRI and ISUP. These
nodes use the ATP to transport information back and forth to each other and
across the DMS-250 ISDN. The DMS-250 switch transports the ATP from
the incoming IAM on an ISUP trunk to the outgoing SETUP message on a
PRI trunk.
If an ATP is received from the originator and the call is sent to the RLT
platform, then it will be included in the IAM.
If an ATP is received in either an IAM or FAR message from the RLT
platform, it is sent out to the terminator for appropriate processing.
If the terminator is ISUP, then the ATP is copied in the outgoing IAM. If the
terminator is PRI, then the ATP is converted into Q.931 format information
elements and sent in the SETUP message to the terminator.
Figure 7-15 shows how this feature works.
Digital Switching Systems DMS-250 ISDN Reference Manual MWC14 (CSP14)
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