Agilent Technologies, Inc.

Avaya UK

Charles Ronald Cook

Clifford Neil Didcock

Michael Geoffrey Andrew Wilson

Charles Graeme Ritchie

There is disclosed a unified messaging system in which a voice mail domain object comprising a plurality of fields is provided. At least one of such fields is selected to be defined as an open field such that it is accessible to an administration application of the system. The open fields are preferably stored as a voice mail domain summary in the e-mail directory of the unified messaging system.

Architecture for unified messaging

A DC feedback control circuit for compensating for a DC voltage level shift in a transimpedance amplifier circuit having a transistor as a high speed switching device. The DC feedback control circuit includes a filter for determining a DC voltage level at an output of the amplifier circuit and a differential pair of transistors for comparing the DC voltage level with a reference voltage. A pair of current mirrors mirror a current dependent on the comparison of the DC voltage level with the reference voltage and apply the mirrored current to an emitter of the transistor so as to maintain a substantially constant bias current through the switching transistor.

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Wakefield, United Kingdom

Charles Ronald Cook