C & C Power, Inc.

Lucent Technologies Inc.

Shujen Chen

Robert E Bland

Paul Joseph Blake

James Leo Leifker

Paul F Matras

Jeng-Yann Wellington Ku

James Leo Leikfer

Where an Uninterruptable Power Supply (UPS) is used in a system to ensure highly reliable power supply to an electronic system, occasional maintenance or repair of the UPS or its storage batteries may be required. Effecting this servicing while ensuring that the utility power continues to be supplied to the load may involve a Maintenance Bypass Assembly (MBA) comprising a plurality of manually-operated circuit breakers. The possibility of an incorrect actuation of such circuit breakers is precluded by the coordination of a plurality of electromechanically actuated circuit breakers in communication with a controller that may store a table of permitted state transitions and sequences for safe operation. Such operation may be confirmed by one or more sensors monitored by the controller.

Maintenance bypass assembly for uninterruptable power supply

A method is disclosed for dynamically allocating radio frequency channels in a wireless telecommunications system populated by a plurality of contiguous cells, each of which communicates with mobile units over the allocated radio frequency channels. In accordance with the method, an optimum channel is selected for use by a requesting cell from a cost table containing values representing the cost of the requesting cell using one or more candidate channels. The selected channel is allocated to the requesting cell and the cost table is updated to reflect the new channel allocation.

Efficient flexible channel allocation in a wireless telecommunications system

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Naperville, IL, United States of America

Shujen Chen