Abstract: A computing device can include a spontaneous meeting component that assists the user to quickly and efficiently find a meeting room for a spontaneous meeting. The spontaneous meeting component can find one or more available meeting rooms in response to the user's selection of a user interface element that indicates a request to identify an available meeting room for the spontaneous meeting. Advantageously, the spontaneous meeting component can be configured to automatically identify one or more available meeting rooms, without requiring any additional user input other than the user's selection of the user interface element. The spontaneous meeting component can be configured to determine an estimated current location of the computing device and an estimated duration of the spontaneous meeting. The proposed meeting room can be identified based at least in part on the estimated current location of the computing device and the estimated duration of the spontaneous meeting.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: A DC feedback control circuit for compensating for a DC voltage level shift in a transimpedance amplifier circuit (12) having a transistor (20) as a high speed switching device. The DC feedback control circuit includes a filter (30) for determining a DC voltage level at an output of the amplifier circuit (12) and a differential pair (36) of transistors for comparing the DC voltage level with a reference voltage (41). A pair of current mirrors (44 and 50) 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 (20) so as to maintain a substantially constant bias current through the switching transistor (20).