Nortel Networks Corporation

Dick H Keilty

Chris R Buchanan

Steven Rhodes

Richard Martin

Tim Jenkins

Kevin MacNeill

Timothy Winston Hibberd

Ron Wellard

Chi-Yin Wong

The invention provides an adapter card for use with a computing apparatus executing in a multitasking environment program elements that implement call-related functional units requiring DSP (Digital Signal Processor) resources. In a specific example, the call-related functional units provide voice recognition services, IP (Internet Protocol) telephony and voice message, among others. The adapter card includes a switch that receives voice signals from one or more telephone lines physically connected to the adapter card. A digital signal processor is provided on the adapter card and can receive an audio signal from the switch for processing. When anyone of the call-related functional units needs access to the resources of the DSP, it issues a control signal to the switch that responds by directing the audio signal that is to be processed by the call-related functional unit to the digital signal processor. The results of the manipulations performed by the digital signal processor on the audio signal are then transferred to the call-related functional unit for further processing. The invention also provides a method and apparatus for processing calls implementing the above-functionality, and a digital signal processor featuring a switch capability coupled to a time-shared DSP resource.

Adapter card implementing a time-shared digital signal processor

A circuit arrangement is provided for connecting a personal computer (PC) to a port of a key telephone system via an adapter circuit which also interfaces a digital key set to the port. The adapter circuit is connected to the computer via an RS-232 single channel data link. The PC is programmed to generate and receive a serial data stream into which are encapsulated messages relating to link control and telephone functionality. The adapter circuit is also programmed to receive and generate the serial data stream. The data rate through the adapter circuit and the telephone system and hence to a remote computer is dependent on the utilization of the attached key set by the user to make a call.

Circuit arrangement for providing internet connectivity to a computer in

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Kanata, Canada

Dick H Keilty