- DWORD ISUPRetrieveMessage ( CTAHD ctahd,
SiAllSdus *event,
IsupRcvInfoBlk *infoBlk,
Bool wait )
- ctahd CT Access handle returned by ctaCreateContext.
- event Address of caller's event buffer, where the received event (if any) is returned to the caller. This buffer must be large enough to accommodate any of the events specified in Appendix B, as defined by the
SiAllSdus structure (union of all event structures). The actual event structure returned (i.e., which member of the union) depends on the value of the infoBlk.indType field returned (see Details).
- infoBlk Address of caller's receive information block, where information regarding the received event (if any) is returned to the caller. The structure of the receive information block is as follows:
typedef struct rcvInfoBlk {
U8 indType; /* indication
* confirm. type */
U8 evntType; /* event type for
* status &
* connection status
* indications */
SuId suId; /* service user(SAP)
* id-all */
SiInstId suInstId; /* caller's
* reference
* number-all */
SiInstId spInstId; /* ISUP's refnce
* number-all */
CirId circuit; /* circuit id - all*/
Bool globalFlg /* global/circuit
* specific flag -
* status ind. only*/
U8 spare; /* filler for future
* use */
} IsupRcvInfoBlk;
- The indication type (
indType) identifies the event received and is coded to one of the following values:
EVTSITCONCFM 0x0D /* Connect confirm */
EVTSITCONIND 0x0E /* Connect
* indication */
EVTSITDATIND 0x16 /* Data indication */
EVTSITSUSPIND 0x3A /* Call suspend
* indication */
EVTSITRESMIND 0x36 /* Call resume
* indication */
EVTSITCNSTIND 0x5A /* Connection status
* ind. */
EVTSITRELIND 0x5E /* Connection release
* ind. */
EVTSITRELCFM 0x5D /* Connection release
* confirmation */
EVTSITFACIND 0x6A /* Call facility
* indication */
EVTSITSTAIND 0x7A /* Status
* indication */
- The
evntType identifies the actual message received for status and connection status indications. It is coded to one of the following values:
For Connection Status Indications
ADDRCMPLT Address Complete
MODIFY Call Modification Request
MODCMPLT Call Modification Complete
MODREJ Call Modification Rejected
PROGRESS Call Progress information
FRWDTRSFR Forward Transfer
IDENTREQ Identification Request
IDENTRSP Identification Response
INFORMATION Information (response to
INFORMATREQ)
INFORMATREQ Information Request
SUBSADDR Subsequent Address Message
For Status Indications
REATTEMPT Reattempt Indication
ERRORIND Error Indication
CONTCHK Continuity Check
CONTREP Continuity Report
STPCONTIN Stop Continuity Indication
LOOPBCKACK Loop Back Acknowledge
CONFUSION Confusion Indication
CIRRESERVE Circuit Reservation Request
CIRRESERVEACK Circuit Reservation
Acknowledge
CIRGRPQRYRSP Circuit Group Query
Response
CIRBLKREQ Circuit Block Request
CIRBLKRSP Circuit Block Response
CIRUNBLKREQ Circuit Unblock Request
CIRUNBLKRSP Circuit Unblock Response
CIRRESREQ Circuit Reset Request
CIRGRPBLKREQ Circuit Group Block Request
CIRGRPBLKRSP Circuit Group Block
Response
CIRGRPRESACK Circuit Group Reset
Acknowledge
CIRGRPUNBLKREQ Circuit Group Unblock
Request
CIRGRPUNBLKRSP Circuit Group Unblock
Response
CIRUNEQPD Circuit Unequipped
Indication
MTPPAUSE Pause indication received
from MTP
MTPRESUME Resume indication received
from MTP
RMTUSRUNAVAIL Remote user unavailable
RMTUSRAVAIL Remote user available
MTPCONGEST Congestion indication
received from MTP
MTPSTOPCONGEST Stop congestion indication
received from MTP
CIRGRPSET Circuit group set status
CIRGRPGET Circuit group get status
MTPBACKUP BACKUP received from MTP
MTPPRIMARY PRIMARY received from MTP
MTPSTANDALONE STANDALONE received from MTP
For Facility Indications
FACILITY facility
FACILITYREQ facility request
FACILITYACC facility accept
FACILITYREJ facility reject
FACILITYDEACT facility deactivate
FACILITYINFO facility information
Note: The service provider instance id (spInstId) field from the first event received from the ISUP for each connection must be saved by the user application and used in subsequent requests associated with that connection.
- wait Wait Flag - obsolete
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