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ISUPConnectReq
Description
- Requests establishment of a circuit switched connection.
Prototype
- short ISUPConnectReq (U8 board,
- SpId spId,
- SiInstId suInstId,
- SiInstId spInstId,
- Bool cirSelFlg,
- CirId circuit,
- SiConEvnt *conEvnt)
- board The TX Series board number to which this request is destined.
- spId The ISUP sap ID to which the caller is bound.
- suInstId Service user instance ID - Caller's reference number associated with this connection; this number will be passed on all subsequent events associated with this connection. Its use and meaning are relevant only to the application.
- spInstId Service provider instance ID - ISUP layer's reference number for this connection. If this message is associated with a previously established connection (e.g., a circuit reservation/continuity test), the spInstId must be the spInstId value returned in the first event received from the ISUP layer relative to this connection. If this is the first message associated with this connection, this value should be coded to 0 (zero).
- cirSelFlg Circuit selection flag - Code this value to 0 (false) if ISUP is to select the outgoing circuit; Code this value to non-zero (true) if the circuit parameter contains the circuit ID to be used for this connection.
- circuit The circuit ID to be used for this connection if the cirSelFlg parameter is set to true.
- conEvnt Pointer to the caller's connect event structure containing all parameters (IEs) relevant to establishing this connection.
Return Values
Details
- When successful, ISUPConnectReq results in an initial address message (IAM) being sent to the far exchange. If the ISUP layer cannot successfully initiate the outgoing connection request (due to network congestion or the requested circuit not being idle, for example), it returns an asynchronous STATUS INDICATION event to the application with the cause value coded with the reason for the failure.
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