Table of Contents
Advertisement
Feature interaction 7-55
introduced. For calls that are released because they were fraudulent, the
value is 8. Prior to this feature, values 8–15 were unused.
Once the fraudulent call is found, the originator is released, followed by the
terminator. If either of these is an ISUP or PRI trunk, it is released with
cause values of normal call clearing.
When the bridging switch processes the ISUP facility message, it commands
the fraudulent call to take itself down. If the call is released before the
release command reaches the call, the status ISUP facility message indicates
that the call was found and released. However, the TP7Q in the billing
record is not set to 8; rather it is set to the value that indicates how the call
was released.
The call reference is contained within the Call Interrupt Information (CII)
parameter, which is included in the Super Generic Digits (SGD) of an
incoming ISUP Initial Address Message (IAM).
Figure 7-16 shows the method of handling a fraudulent call through an ISUP
facility.
Digital Switching Systems DMS-250 ISDN Reference Manual MWC14 (CSP14)
Advertisement
Table of Contents
