Welltech Dialogic SS7 Protocols ISUP Manuale Utente Pagina 40

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Section 6 Interface to Application
40
6.5.19 Overload Request
Note: This message is only applicable to ITU-T operation
This primitive is used by the application to invoke temporary trunk blocking of
a circuit.
Message type
OLM (Overload Message)
Mandatory parameters
None
Optional parameters
None
6.5.20 Pre-Release Information Request
Note: This message is only applicable to ITU-T operation
This primitive can be issued in all call states up until release. It is used by
the application to send end-to-end information prior to the release of a call.
Message type
PRI (Pre-Release Information Message)
Mandatory parameters
None
Optional parameters
Optional forward call indicators
Optional backward call indicators
Message compatibility information
Parameter compatibility information
Application transport parameter
This parameter may be repeated (see
Appendix E: ISUP Repeat
Parameters
on page 197).
End of optional parameter
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