Multiplex communications – Communication techniques for information carried in plural... – Combining or distributing information via time channels
Reexamination Certificate
2005-04-12
2005-04-12
Vu, Huy D. (Department: 2664)
Multiplex communications
Communication techniques for information carried in plural...
Combining or distributing information via time channels
C370S537000, C370S361000, C370S373000, C370S376000, C370S384000
Reexamination Certificate
active
06879603
ABSTRACT:
A technique for performing a time slot interchange in a processor. The TSI process is surrounded by a multiplexing/demultiplexing circuit for converting a plurality of PCM highways into a single input serial data stream. The mux/demux circuit includes elastic stores to align frames and shift resisters to mux/demux with a minimum of delay. The TSI processor includes an input and an output buffered series port, a pair of input buffers, one to receive even-numbered frames from the PCM highways and one to receive odd-numbered frames, and an output buffer. Data is read from the appropriate input buffer in a non-sequential fashion as commanded by the processor in accordance with information stored in connection arrays (address buffers). The data is then written to the output buffer sequentially. The timing of the reading and writing steps is optimized relative to free running buffered serial port pointers for each BSP to reduce the frame delay.
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Dougherty James Michael
Francis Gordon K.
Groth Tim P.
Koenig Roger L.
Morris Matthew D.
Carrier Access Corporation
Hancock E. C.
Holland & Hart LLP
Phan M.
Sirr F. A.
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