When it has been enabled, this notification makes it possible for an APPN topology application to get asynchronous notifications of local TG operational state changes, and thus to reduce the frequency with which it polls for these changes. This notification is sent whenever there is a change to the appnLocalTgOperational object in a row of the appnLocalTgTable. This notification is only sent for row creation if the row is created with a value of 'true' for appnLocalTgOperational. This notification is only sent for row deletion if the last value of appnLocalTgOperational was 'true'. In this case, the value of appnLocalTgOperational in the notification shall be 'false', since the deletion of a row indicates that the TG is no longer operational. The notification is more than a simple 'poll me now' indication. It carries both a count of local TG topology changes, and the current operational state itself. The count of changes allows an application to detect lost notifications, either when polling or upon receiving a subsequent notification, at which point it knows it must retrieve the entire appnLocalTgTable again. This is the same count as used in the appnLocalCpCpStateChangeTrap. A lost notification could indicate a local TG CP-CP session state change or an operational state change. Generation of this notification is controlled by the appnTrapControl object.