This object provide details on the protocol states for this link as follows. Changeback control(TCBC) 'tcbcBuffering': Changeback control is buffering data on this link. Changeover control(TCOC) 'tcocBuffering': Changeover control is buffering data on this link Link availability control(TLAC) 'tlacAdjacentSpRestarting': Adjacent Signalling point is restarting. 'tlacEmergencyCoInProgress': Emergency changeover is in progress on this link. 'tlacChangebackInProgress': Changeback is in progress on this link. 'tlacChangeoverInProgress': Changeover is in progress on this link. 'tlacChangeoverFailed': The last changeover operation failed on this link. 'tlacInhibitRetry': Inhibit command will be retried. 'tlacManagementRequest': Management request in progress for this link. 'tlacSpRestarting': Signalling point is in the process of a restart. 'tlacLocalInhibit': Link has been inhibited by a local management operation. 'tlacRemoteInhibit': Link has been inhibited by a remote management operation. 'tlacLocalBlocked': Link is blocked because of a local processor outage. 'tlacRemoteBlocked': Link is blocked because of a remote processor outage. Signalling routing control(TSRC) 'tsrcChangeOverComplete': Changeove request is complete. 'tsrcAdjacentSpRestart': Adjacent Signalling Point is restarting.