Communications: electrical – Audible indication – Percussion-type sound producer
Patent
1983-09-06
1986-06-17
Shaw, Clifford C.
Communications: electrical
Audible indication
Percussion-type sound producer
370 99, H04J 306
Patent
active
045959072
ABSTRACT:
An interface device for use between a North American PCM channel bank and a CCITT PCM channel bank which allows data to stay in digital format rather than being converted to voice frequency. The interface takes care of not only the completely different serial data rates, but the different transfer characteristics of the channel data words. Synchronization is obtained by dividing the serial data stream into enough channel banks so that there is less than one-half cycle time period difference between the frequency of the incoming and outgoing data streams for one cycle of channel data words.
REFERENCES:
patent: 4138596 (1979-02-01), Roche
patent: 4154985 (1979-05-01), Munter
Huffman Charles E.
Southerland Stephen R.
Hamann H. Fredrick
Lutz Bruce C.
Rockwell International Corporation
Sewell V. L.
Shaw Clifford C.
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