One or more remote user unavailable (RMTUSRUNAVAIL) indications are delivered to the application when the ISUP layer receives a remote user unavailable indication from the MTP 3 layer. The rangStat member of the status event structure (SiStaEvnt) is populated when RMTUSRUNAVAIL indications are delivered to the application.
The range value indicates the number of affected circuits minus one. The circuit member of the IsupRcvInfoBlk indicates the first affected circuit. Affected circuits are considered to be out of service.