When a failed board is reloaded, the TCAP application closes the TCAP service on that board if it was not already closed when the failure occurred.
When the Health Management service backup indication is received, the TCAP application can reopen the TCAP service to the board. A backup run state indication is received from the TCAP service after the open service is completed.
When the backup board is reloaded, it no longer contains a valid set of open transactions. After the backup board is reloaded, it requests an update of the open transactions from the primary board. When this process is complete, a backup ready run state indication is sent to the TCAP application.