Welltech Dialogic SS7 Protocols ISUP - Manual (Page 40)

Section 6 Interface to Application
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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