[ AC/DC rectifiers, fan trays, ] [ circuit breaker panels,] [ power conversion networks and devices, namely, ] [ platforms, ] [ rectifiers, switch mode rectifiers, converters, inverters, ] [ transformers,] [ power supplies, point of use power supplies, ][ integrated point of use power supplies, ] [ adapters, ] [ power switchers, ] [ breakers, breaker interface panels, power distribution elements, ] [ shelves,] [ chargers, ] [ generators, ringing generators, fan management units, ] [ rack converters and monitors used to sense power surges and failures, power anomalies, power distribution performance and power control parameters and information and reporting of same by means of alarm or reports, power systems for telephone equipment, DC/DC devices, namely, board-mount modules, and converters, ] [ and inverters, encoders, electrical and electronic tuners,] [ switching power supplies, ] [ inverters, microprocessor inverters and RF interface units; cables and connectors, panel meters, potentiometers, and toroids; electronic displays,] [ satellite television equipment, namely, adapters for powering set-top boxes ] [; semiconductors; inductors; capacitors; resistors; power supplies, modulators; monitors which determine the severity of an alarm and remotely request the appropriate level of intervention by maintenance and other personnel and for scheduling maintenance activities; and ballasts ] * AC/DC rectifiers, fan trays, power conversion networks and devices, namely, rectifiers, converters, power supplies, point of use power supplies, DC/DC devices, namely, board-mount modules, converters, switching power supplies *