Northern Telecom Limited

Jonathan David Loewen

John Frank Pillar

Alan Charles Coady

Deborah Ann Frischknecht

The invention resides in the field of transferring data and other information from multiple asynchronous TDM channels across a synchronous interface in digital blocks of a preset length. Presently, transfer of data and timing information requires serial transmission of frame payload, qualified with clock and frame pulse indications. A separate set of these signals is required in both directions for each port or physical link. An interface of the invention permits data transfer in blocks which are uniquely identified for a specific port or links and the position of the block within the frame (if the transfer is one of framed data). The invention greatly reduces the number of required signals, thus enabling reduction of pin count requirements and an increase in the number of serviced ports.

Data transfer method and apparatus

A technique of processing multiple digital signal streams uses one instantiation of an algorithm with memory storage of the next state, to facilitate context switching. In one embodiment, the invention is applied to framing and mapping techniques, resulting in a low circuit count for implementation with excellent performance, when measured with the commonly accepted criteria.

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Kanata, Canada

Jonathan David Loewen