0581 - Loss of heartbeat
This indicates that an FC enabled card did not receive a heartbeat message from XMF server before the expiry of RCV heartbeat timer.
        Example        
      
                       RLGHNCXA21W 00-12-09 12:01:43 EST  EAGLE 40.1 
 *   0108.0581 *      Card 1104           Loss of heartbeatAlarm Level: Minor
Recovery
No action necessary.
- Inspect the backplane for loose dongle cables (P/N 830-1343-0X).
- Verify the RJ45 cables are connected completely on the backplane.