Microtelephone controller
First Claim
1. A switching device for transferring digital information between a system node which functions at a first rate and one or more devices which function at rates which are different than said first rate, the switching device comprising:
- a system interface for communicating a signal stream including voice, data, and control information between the switching device and the system node and for providing signals identifying said voice, data, and control information in the switching device, the system interface including a system interface multiplexer operative to combine voice signals from an audio device and data signals from a data device in a message frame for transmission to the system node;
a microprocessor interface responsive to said identifying signals for communicating control information between a selected device and the switching device;
a voice interface responsive to said identifying signals for communicating voice information between an audio device and the switching device;
a data interface responsive to said signals for communicating data information between a data device and the switching device, with said local data device functioning at any of a plurality of rates; and
rate conversion logic for altering the rate of a selected portion of said information to a serial rate which corresponds to a data stream rate of one of said selected, audio, or data devices.
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Accused Products
Abstract
A large scale integrated circuit device is disclosed that can be used as a component in a variable bandwidth branch exchange system or for other applications utilizing programmable serial data rate conversion. The device can be a serial information interface between a system node and the voice and data channels in a telset or other similar data communications device. The device may be controlled and monitored by an external device such as a microprocessor, and can transfer control and status information between the external control device and the system node.
98 Citations
22 Claims
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1. A switching device for transferring digital information between a system node which functions at a first rate and one or more devices which function at rates which are different than said first rate, the switching device comprising:
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a system interface for communicating a signal stream including voice, data, and control information between the switching device and the system node and for providing signals identifying said voice, data, and control information in the switching device, the system interface including a system interface multiplexer operative to combine voice signals from an audio device and data signals from a data device in a message frame for transmission to the system node; a microprocessor interface responsive to said identifying signals for communicating control information between a selected device and the switching device; a voice interface responsive to said identifying signals for communicating voice information between an audio device and the switching device; a data interface responsive to said signals for communicating data information between a data device and the switching device, with said local data device functioning at any of a plurality of rates; and rate conversion logic for altering the rate of a selected portion of said information to a serial rate which corresponds to a data stream rate of one of said selected, audio, or data devices. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A switching device for transferring digital information between a system node which functions at a first rate and one or more devices which function at rates which are different than said first rate, the switching device comprising:
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a system interface for communicating a signal stream including voice, data, and control information between the switching device and the system node, the system interface including a system interface multiplexer operative to combine voice signals from an external audio device, data signals from an external data device, and control information from an external microprocessor in a message frame for transmission to the system node, the system interface further including timing circuitry for receiving a message frame from the system node, the received message frame including voice, data, and control information, the timing circuitry being operative to generate separate enable signals in response to the occurrence of each of the voice, data, and control information portions of the received message frame; a microprocessor interface responsive to said enable signals for communicating control information between the external microprocessor and the switching device; a voice interface responsive to said enable signals for communicating voice information between the audio device and the switching device; a data interface responsive to said enable signals for communicating data information between the external data device and the switching device, with said data device functioning at any of a plurality of rates; and rate conversion logic for altering the rate of a selected portion of said message frame received from the system node to a serial rate which corresponds to a data stream rate of one of said microprocessor controller, audio device or data device.
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20. A switching device for transferring digital information between a system node which functions at a first rate and one or more devices which function at rates which are different than said first rate, the switching device comprising:
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means for communicating a signal stream comprising voice and data information between the switching device and system node; means for providing signals identifying said voice and data information; means respsonsive to said signals for communicating voice information between an audio device and the switching device; means responsive to said signals for communicating data information between a data device and the switching device, with the data device functioning at any of a plurality of rates; and means for altering the rate of a selected portion of said voice and data information to a serial rate which corresponds to a data stream rate of one of said audio device or data device. - View Dependent Claims (21, 22)
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Specification