Circuit group unblock request

A circuit group unblock request (CIRGRPUNBLKREQ) indication is delivered to the application when the ISUP layer receives a circuit group unblocking message (CGU) from the far exchange. The application must consider the referenced circuits to be remotely unblocked. The application must then acknowledge the circuit group unblocking message by sending a circuit group unblocking acknowledgment message using ISUPStatusReq.

The rangStat member of the status event (SiStaEvnt) structure is populated when CIRGRPUNBLKREQ indications are delivered to the application.