3Com 5017C with load sharing Fault-Tolerance Capabilities, Backup Power Supply, Load Sharing

Fault-Tolerance Capabilities

The ONline System Concentrator provides fault tolerance through redundant features, such as an optional backup power supply, backup controller module, redundant cable links, and backup concentrator capability.

Backup Power Supply

An optional second power supply can be used to backup the primary power supply in case of a power failure. Should the primary power supply fail, the backup power supply takes over automatically. In addition, once a backup power supply has been installed, you can replace a failed primary power supply without shutting down the system.

Load Sharing

The load-sharing function provides uninterrupted power to modules installed in a concentrator with two power supplies. If the active power supply fails, the concentrator automatically switches to the other power supply without interrupting the network.

The following ONline 17-Slot System Concentrators have load-sharing capability:

❑Model 5017C-LS

❑Model 5017C with load-sharing upgrade

To determine if your model 5017C concentrator has load-sharing hardware, check the rear of the concentrator chassis for a label reading “Upgraded w/30-0286.” If this label is present, the concentrator has received the load-sharing upgrade.

In order for load sharing to work, the Fault-Tolerant Controller Module model 5000M-RCLS must be installed. This controller monitors the concentrator's load-sharing function.

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