Loop back acknowledgment

A loop back acknowledgment (LOOPBCKACK) status indication is delivered to the application when the ISUP layer receives a loop back acknowledgment message (LPA) from the far exchange.

When the application receives this indication, it must check the transmission path of the referenced circuit. The application then indicates the completion of the continuity check by sending a continuity report message using ISUPStatusReq.

Note: Loop back acknowledgement status indications are not supported in BICC.