7-24 Feature interaction
297-2521-106 Standard 23.01 March 2001
SETUP message
When a SETUP message is received, the network checks to see whether the
calling number information element is included. If so, it is captured in the
ANI field in the appropriate billing record. (PRI delivers pseudo-ANI for
FGC trunks.)
SETUP contains calling number
If the calling number information element is included in the SETUP
message, the following rules for the calling number delivery apply
(depending on the CPIALLOW value in Table CALLATTR for the
terminating PRI):
• CPIALLOW = YES
— If the screening indicator is not present in the calling number, the
screening indicator is set to user-provided, not screened and the
calling number is sent unchanged in the outgoing SETUP message to
the terminating PRI. If the screening indicator is present in the
calling number, it is relayed to the terminating PRI.
— If the user has provided the presentation indicator in the calling
number, it is passed unchanged to the terminating PRI. Otherwise,
the presentation indicator is set to the subscription default value
“presentation allowed.”
• CPIALLOW = NO
— The calling number information element is not delivered in the
SETUP message to the terminating PRI. This means the presentation
indicator and screening indicator fields are also not delivered.
SETUP does not contain calling number
If the SETUP message does not contain the calling number information
element, the following rules apply (depending on the CPIALLOW value in
Table CALLATTR for the terminating PRI):
• CPIALLOW = YES
— If the calling number is not received, then it is not sent.
— The screening indicator is set to “network provided,” and the
presentation indicator is set to the default value “presentation
allowed.” The calling number is not sent.
• CPIALLOW = NO
— The calling number information element is not passed to the
terminating PRI.
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