Plantronics, Inc.

David Huddart

Peter M Flowerdew

Robert M Khamashta

Keith Derrick

Arthur Anderson

An accessory interface bus for a telecommunications headset adapter or base unit, which controls and monitors the operations of various headset accessories coupled to the interface bus, is disclosed. The accessory interface bus allows the telecommunications headset adapter to detect when a new accessory is coupled to the bus. The interface bus may be implemented within a headset adapter base in a telecommunications system that includes the headset adapter base, a telecommunications headset coupled to the adapter base, and various headset accessories coupled to the adapter base. The interface bus transmits control and status signals between the headset adapter base and the various headset accessories to directly control and monitor operations for each headset accessory coupled to the interface bus. The control and monitoring of a given headset accessory may include activating or deactivating, resetting, and/or simulating a button press of a button located on the accessory.

Accessory interface bus for telephone headset adapter

Systems and methods for a wireless stereo headset are disclosed. The system generally includes a first headset component and a second headset component. Both the first headset component and the second headset component may be wireless devices.

Wireless stereo headset

An apparatus for inductive charging a battery. The apparatus includes a housing with a lower surface and a charging surface. A rechargeable device with a rechargeable battery may be placed on the charging surface. The apparatus further includes a controller for driving an oscillator, wherein the controller receives power from a power source. A first charger coil and second charger coil are disposed within the housing and are coupled to the oscillator. The first charger coil and second charger coil create a substantially horizontal magnetic field in the volume of space above the charging surface.

Inductive charging system

A wireless communication system automatically aligns a magnetic induction field to establish a two-way communication link between a stationary base unit located, for example, at a user's work station, and a remote unit worn by the user, for example, as a headset or body pack. At any point in time, the base unit and the remote unit have an arbitrary relative orientation to each other. The base unit senses this orientation, then aligns the magnetic induction field to maintain the communication link with the remote unit. In one embodiment, the base unit preferably includes an aerial array having a number of mutually orthogonal windings. Each winding produces a signal when a magnetic induction field generated by the remote unit passes through the base unit. A selector module selects the longitudinal axis of the winding with the strongest signal as an approximation of a direction vector defining the orientation of the magnetic induction field relative to the base unit. In another embodiment, the base unit preferably includes an aerial array comprising three orthogonal windings disposed about a spherical core. A selector module selects one or more windings for transmitting a magnetic field that rotates in a plane orthogonal, i.e., 'crossed field,' to the direction vector defining the orientation of the received field relative to the base unit.

Vector measuring aerial arrays for magnetic induction communication

A telephone interface unit automatically configures itself to couple a headset to a telephone. The interface unit comprises a switch matrix, for coupling various signal lines of the telephone to various signal lines of the headset, and a control logic, for automatically setting the switch matrix. The interface unit also comprises a variable gain circuit, for adjusting the amplitude of signals transmitted by the headset. The control logic automatically adjusts the gain of the variable gain circuit such that the gain of the headset is matched to the gain of the telephone.

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Westbury-on-Trym, United Kingdom

David Huddart