Welltech Dialogic SS7 Protocols ISUP Manuale Utente Pagina 60

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Section 6 Interface to Application
60
6.6.4 Circuit Seized Indication
This primitive is used by ISUP to indicate that the circuit has been seized for
an incoming call (but no address information has yet been received) and a
continuity test call has been received (refer to
Section 6.8.4:
Continuity
Testing
on page 95).
Message type
SZE (Circuit seized)
Mandatory parameters
Nature of connection indicators
Optional parameters
None
6.6.5 Collection Charging Indication
This primitive is used ISUP after alerting to convey the number of charging
units.
Message type
MPM (Collection Charging Message)
Mandatory parameters
Number of metering pulses
Message number
Optional parameters
None
6.6.6 Confusion Indication
This primitive is issued by ISUP on receipt of a Confusion message from the
network.
Message type
CFN (Confusion Message)
Mandatory parameters
None
Optional parameters
Cause Indicators
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