Abnormal or unexpected HSL OptiConnect disconnection from a remote system or partition. The local system or partition disconnected from a remote system or partition due to an unexpected event or failure. The problem, which most likely originates with the remote system or partition, probably requires intervention at the remote system. Examine both the local and remote HSL OptiConnected systems or partitions for problems on this RIO or HSL loop. Possible reasons include: A fatal software or hardware error in the remote system or partition, or a power failure in the remote system. If a complete RIO or HSL loop did not exist before this error occurred, the cause of this error might be a failure or power down in a RIO or HSL component between the local system or partition and the remote system or partition. Check for a problem with the following:

• A RIO or HSL cable
• The RIO or HSL I/Oidge
• Power in an expansion I/O tower or unit on this loop

On the local system or partition, examine the Service Action Log (SAL) or serviceable event view. Look for RIO or HSL failures that occurred on the same RIO or HSL loop at approximately the same time as this error. Examine the remote system or partition for problems. If the remote system or partition is powered on and IPL'd, examine the SAL or serviceable event view on the remote system or partition. Look for problems on the same RIO or HSL loop that occurred at approximately the same time as this error. Correct any problems you find with the remote and local systems or partitions that happened at approximately the same time and involve HSL Opticonnect or RIO or HSL loop components. When the remote system is IPL'd, it will automatically reconnect with this system or partition. If you find no problems with either the local or the remote systems or partitions, collect all the Product Activity Log (PAL) information for this failure on both systems. Be sure to record all words in the SRC. Contact your next level of support.